Academic literature on the topic 'Serre solari'
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Journal articles on the topic "Serre solari"
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Koutchmy, Serge. "Serge Koutchmy: Spectacular exposure to solar eclipses." Physics World 14, no. 4 (April 2001): 50–51. http://dx.doi.org/10.1088/2058-7058/14/4/41.
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Miaoulis, Ioannis N., and Bradley D. Heilman. "Butterfly Thin Films Serve as Solar Collectors." Annals of the Entomological Society of America 91, no. 1 (January 1, 1998): 122–27. http://dx.doi.org/10.1093/aesa/91.1.122.
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Koon, Daniel W. "Comment on “Butterfly Thin Films Serve as Solar Collectors”." Annals of the Entomological Society of America 92, no. 4 (July 1, 1999): 459. http://dx.doi.org/10.1093/aesa/92.4.459.
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Ortiz de Adler, Nieves, and Ana G. Elias. "The solar cycle in the temperature of the tropical stratosphere." Geofísica Internacional 43, no. 1 (January 1, 2004): 5–9. http://dx.doi.org/10.22201/igeof.00167169p.2004.43.1.207.
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En este trabajo se busca una relación entre la anomalía de la temperatura estratosférica tropical a 10 hPa (~30 km), durante el período 1964-1996 y el flujo solar F10.7 cm. De las cuatro series estacionales y de la serie anual, se filtró la tendencia de largo plazo y la influencia de la oscilación de casi dos años (QBO). El coeficiente de correlación lineal r entre la temperatura y F10.7 para cada una de las cinco series está entre 0.02 y 0.31, lo que llevaría a pensar que la asociación entre la temperatura y el ciclo solar es débil. Sin embargo, si los datos de cada serie son agrupados de acuerdo con el ciclo solar al que pertenecen, la temperatura en función de F10.7 presenta un comportamiento no aleatorio, similar a una histéresis. El sentido de rotación, el eje y el área de cada histéresis varía segun el ciclo solar. El área, proporcional al desfasaje entre la temperatura y el F10.7, se hace más grande desde el ciclo 20 al 22. Para la serie anual r es 0.83 en el ciclo 20, decreciendo a 0.62 y 0.16 para los ciclos 21 y 22 respectivamente. La correlación entre la temperatura y F10.7 se hace progresivamente menos lineal desde el ciclo 20 al 22. Esto podría explicarse porque la temperatura estratosférica depende no sólo del flujo solar, sino de parámetros como O3 y CO2 y de los mecanismos de feedback entre ellos. A pesar de la pérdida de significancia estadística, el análisis de los datos agrupados por ciclo solar permitiría detectar cambios progresivos en una dada asociación.
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Caron, J., L. Laverdière, P. O. Thibodeau, and R. R. Bélanger. "Utilisation d'une souche indigène de Trichoderma harzianum contre cinq agents pathogènes chez le concombre et la tomate de serre au Québec." Phytoprotection 83, no. 2 (April 12, 2005): 73–87. http://dx.doi.org/10.7202/706230ar.
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Le potentiel antagoniste du biofongicide à base de Trichoderma harzianum MAUL-20, isolé au Québec, a été testé contre cinq agents telluriques phytopathogènes(Fusarium oxysporum f. sp. radicis-lycopersici (FORL), Pythium ultimum, Rhizoctonia solani, Sclerotinia sclerotiorum et Verticillium dahliae) du concombre et de la tomate de serre. Le biofongicide a démontré une efficacité contre P. ultimum et R. solani chez le concombre et la tomate et contre FORL chez la tomate. De plus, T. harzianum MAUL-20 a eu un effet stimulant sur le développement des plants de concombre lorsque cultivés, sans agents pathogènes, dans un substrat organique alimenté du biofongicide. L'efficacité de T. harzianum MAUL-20 a été comparée à celle du biofongicide américain Rootshield™ (Trichoderma harzianum KRL-AG2) et le premier a démontré une activité antagoniste égale ou supérieure à celle de Rootshield™.
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Duan, Tainan, Maxime Babics, Akmaral Seitkhan, Yuliar Firdaus, Ru-Ze Liang, Federico Cruciani, Shengjian Liu, Sergei Lopatin, and Pierre M. Beaujuge. "F-Substituted oligothiophenes serve as nonfullerene acceptors in polymer solar cells with open-circuit voltages >1 V." Journal of Materials Chemistry A 6, no. 20 (2018): 9368–72. http://dx.doi.org/10.1039/c8ta02781a.
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F-Substituted oligothiophenes were designed and used as nonfullerene acceptors in BHJ solar cells. With low-bandgap polymer donors, the solar cell devices reach PCEs of up to 4.5% and open-circuit voltages >1 V.
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Jordán Lorenzo, Ángel A. "Pautas generales del hábito epigráfico entre los Vascones durante el Principado (siglos I-III d.C.)." Cuadernos de Arqueología 21 (November 10, 2013): 81–111. http://dx.doi.org/10.15581/012.21.377.
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El presente trabajo se centrará en el análisis de la producción epigráfica en el solar atribuido a los vascones, a través de cuatro marcadores que aparecen de forma inequívoca en todas las inscripciones: su lugar de aparición, cronología, tipología y usuario. Con ellos se puede obtener una serie de pautas generales del uso de este medio de comunicación que permitan caracterizar la cultura epigráfica en este solar.
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Weber, Eliseu José, and Denise Cibys Fontana. "Obstrução do horizonte calculada a partir de modelo digital de elevação." Pesquisa Agropecuária Brasileira 47, no. 9 (September 2012): 1327–36. http://dx.doi.org/10.1590/s0100-204x2012000900018.
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O objetivo deste trabalho foi avaliar a exatidão do cálculo da obstrução do horizonte, a partir de um modelo digital de elevação (MDE), em diferentes situações topográficas. O material utilizado incluiu um MDE disponível para a região da Serra Gaúcha, RS, receptores GPS, câmera digital, lente grande‑angular e os programas Idrisi, Arcview/ArcGIS e Solar Analyst. Foram adquiridas fotografias hemisféricas, e coletadas as coordenadas de 16 locais na área de estudo. As coordenadas e o MDE foram utilizados para calcular a obstrução do horizonte com uso do algoritmo Solar Analyst. Foram comparadas a fração aberta do céu calculada e a obtida pelas fotografias hemisféricas. O coeficiente de determinação foi de 0,8428, tendo-se observado superestimativa média de 5,53% da fração aberta do céu. Os erros são atribuídos principalmente à obstrução pela vegetação, que não pode ser identificada pelo MDE. A obstrução do horizonte, causada pelo relevo na Serra Gaúcha, pode ser calculada satisfatoriamente pelo Solar Analyst, a partir de um MDE interpolado de cartas topográficas na escala 1:50.000.
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Song, Yadong, Hongyan Lu, Qiong Wang, and Rong Xiang. "Targeting Angiogenesis by Blocking the ATM–SerRS–VEGFA Pathway for UV-Induced Skin Photodamage and Melanoma Growth." Cancers 11, no. 12 (November 22, 2019): 1847. http://dx.doi.org/10.3390/cancers11121847.
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Retinoic acid (RA) has been widely used to protect skin from photo damage and skin carcinomas caused by solar ultraviolet (UV) irradiation, yet the mechanism remains elusive. Here, we report that all-trans retinoic acid (tRA) can directly induce the expression of a newly identified potent anti-angiogenic factor, seryl tRNA synthetase (SerRS), whose angiostatic role can, however, be inhibited by UV-activated ataxia telangiectasia mutated (ATM) kinase. In both a human epidermal cell line, HaCaT, and a mouse melanoma B16F10 cell line, we found that tRA could activate SerRS transcription through binding with the SerRS promoter. However, UV irradiation induced activation of ATM-phosphorylated SerRS, leading to the inactivation of SerRS as a transcriptional repressor of vascular endothelial growth factor A (VEGFA), which dampened the effect of tRA. When combined with ATM inhibitor KU-55933, tRA showed a greatly enhanced efficiency in inhibiting VEGFA expression and a much better protection of mouse skin from photo damage. Also, we found the combination greatly inhibited tumor angiogenesis and growth in mouse melanoma xenograft in vivo. Taken together, tRA combined with an ATM inhibitor can greatly enhance the anti-angiogenic activity of SerRS under UV irradiation and could be a better strategy in protecting skin from angiogenesis-associated skin damage and melanoma caused by UV radiation.
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Lopes, Pabricio M. O., Dalton M. Valeriano, Bernardo B. da Silva, Geber B. de A. Moura, and Alexsandro O. da Silva. "Simulação do saldo de radiação na Serra da Mantiqueira." Revista Brasileira de Engenharia Agrícola e Ambiental 17, no. 7 (July 2013): 780–89. http://dx.doi.org/10.1590/s1415-43662013000700013.
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A influência do desmatamento da Mata Atlântica sobre o microclima da Serra da Mantiqueira ainda não é totalmente compreendida. Para conhecer as consequências do desmatamento sobre o clima serrano é necessário realizar estudos sobre o balanço de radiação na superfície. A falta de dados possibilita conjugar imagens de satélite com dados meteorológicos em um Sistema de Informação Geográfica na determinação do balanço de radiação. O presente estudo teve por objetivo avaliar o modelo MTCLIM em dias de céu claro ou nublado para simular o balanço de radiação na Serra da Mantiqueira, divisa entre os estados de São Paulo, Minas Gerais e Rio de Janeiro, Brasil. Imagens diárias, semanais e dezesseis dias do sensor MODIS disponíveis em 2003 foram utilizadas em rotinas específicas do MTCLIM. Alvos específicos foram selecionados para avaliar o comportamento do balanço de radiação. Observou-se que o balanço de radiação acompanhou a topografia local e é influenciado pelo tipo de uso da terra. Conclui-se que a temperatura da superfície contribui para aumentar a temperatura do ar implicando em diminuição do balanço de radiação sobre pastagem. O modelo MTCLIM demonstrou boa correlação para a temperatura do ar (R² = 0,82) e para a radiação solar global (R² = 0,71).
Dissertations / Theses on the topic "Serre solari"
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Aumporn, Orawan. "Contribution à l'étude des performances d'un séchoir serre avec stockage de chaleur dans des matériaux à changement de phase." Thesis, Perpignan, 2017. http://www.theses.fr/2017PERP0032/document.
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Ce travail concerne une étude numérique des performances thermiques d’un séchoir- serre équipé d’une unité de stockage de chaleur solaire dans des matériaux à changement de phase (MCPs). L'unité de stockage de chaleur solaire, placée sous le sol de la serre, est composée d’une couche de MCPs (paraffine) disposée entre une plaque en acier et une couche de béton. L'écoulement de l'air asséchant se déroule par convection forcée et le produit disposé sur les claies du séchoir est la banane (Bananas Musa ABB CV. Kluai "Namwa"). Les équations de transfert de chaleur dans la serre, basées sur la méthode nodale, sont déduites d'un bilan thermique établi pour les différents composants du séchoir-serre. Les transferts de chaleur dans les couches de MCPs et de béton sont décrits respectivement par le modèle enthalpique et l'équation de la conduction. Le modèle de cinétique de séchage de la banane est celui d’Oswin modifié. Les équations de transferts sont résolues par une méthode implicite aux différences finies et les algorithmes de Gauss et de Thomas. Nous analysons l'influence du débit d'air asséchant et de l’irradiation solaire sur les distributions spatio-temporelles des températures des composants de la serre et de l'unité de stockage, la durée de séchage, les efficacités thermiques du séchoir-serre et de l'unité de stockage d'énergie. Cette modélisation est complétée par des simulations du fonctionnement du séchoir serre-unité de stockage de chaleur en utilisant la notion de journée type et les données météorologiques de Nakorn Pathom (Thaïlande) et par une analyse de faisabilité technico-économique. Les résultats montrent notamment que l’unité de stockage de chaleur contribue à la réduction de la durée de séchage et augmente les performances thermiques du séchoir et l’unité de stockageThis work is about a numerical study of the thermal behavior of a solar greenhouse dryer and a heat storage unit in phase change materials (PCMs). The heat storage unit containing of PCMs (paraffin) is disposed between a metal plate and a concrete layer and placed under the floor of the greenhouse. The air drying flows along the greenhouse by forced convection and the products placed on the dryer's rack is bananas (Bananas Musa ABB CV Kluai "Namwa"). The heat transfer equations in the greenhouse are based on the nodal method and deduced from a thermal balance on the different components of the solar greenhouse dryer. The heat transfers in the PCMs and the concrete slab are described by the enthalpy method and the conduction equation, respectively. The banana drying kinetic is described by the model modified of Oswin. Transfer equations are solved using an implicit finite difference method associated to Gauss and Thomas algorithms. We analyze the effects of the air drying volumetric flow rate and the solar irradiance on the temperature distribution of the greenhouse dryer and the heat storage unit, the drying time, the solar greenhouse dryer and heat storage unit efficiencies. This modeling is complemented by simulations of the solar greenhouse dryer with the heat storage unit using the day type and the meteorological data of Nakorn Pathom (Thailand) and by an economic analysis. The results show that the heat storage unit provides the reduction of the drying time and increases the thermal performances of the solar greenhouse dryer and the heat storage unit
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Franceschetti, Paolo <1981>. "Energie rinnovabili e microgenerazione distribuita : serra solare ad evaporazione." Doctoral thesis, Università Ca' Foscari Venezia, 2013. http://hdl.handle.net/10579/4658.
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In un contesto internazionale di ricerca focalizzato allo sviluppo di nuove tecnologie basate su energie alimentate da fonti rinnovabili, un settore di sempre maggiore interesse è lo sviluppo d’impianti di microgenerazione legati all’acqua. In questo settore si pone il presente studio, il quale vuole apportare un contributo innovativo all’ottimizzazione dei sistemi di desalinizzazione/depurazione delle acque sfruttando unicamente la radiazione solare.
Lo stato dell’arte di questi sistemi, denominati serre solari, è stato in prima istanza analizzato al fine di comprenderne le potenzialità e i limiti dal punto di vista fisico e di efficienza. Si sono quindi sviluppati e sperimentate nuove configurazioni che hanno portato a significativi miglioramenti delle prestazioni. Sulla base dei risultati dei primi test, è stato sviluppato poi il calcolo exergetico dell’intero sistema. Attraverso sperimentazioni circa la tipologia dei materiali da utilizzare per la costruzione delle serre solari e le modellizzazioni termodinamiche e fluidodinamiche, si è giunti quindi ad un ulteriore sviluppo dei sistemi. I miglioramenti apportati hanno permesso un’efficienza del sistema depurativo maggiore rispetto allo stato dell’arte. Una volta consolidato il sistema, è stata approfondita l’analisi volta ad individuare in quali aree del pianeta questi sistemi possano essere maggiormente applicabili, in funzione delle condizioni climatiche (modello geo-spaziale – GSI) e delle condizioni antropiche (indice socio-economico –SEI)In an International context of research focused on the development of new technologies based on energy supplied by renewable sources, the development of micro-water treatment plants is of increasing interesting. The current study fits into this perspective with the aim to provide an innovative tool for the optimization of the desalination/water purification systems, by using only the solar radiation source. In the present study, the state of art of the systems, hereafter called solar stills, was analyzed in order to understand their potential and limits from a physical and efficiency perspective. Afterwards, new prototypes were developed and tested, resulting in a significant improvement of the solar stills’ performances. Basing on results from the first test performed, the exergetic calculation of the system was carried out. . Additionally, the experimentation on different types of materials to be used for the construction of the solar stills, in association to the thermodynamic and fluid dynamic modeling processes, allowed us to reach a further development of the systems. Such improvements leaded to a higher efficiency of the solar still, compared to the state of the art. Once the system has been consolidated, a geo-spatial analysis based on both climatic conditions (geo-spatial index - GSI ) and anthropogenic conditions (socio-economic index - SEI), has been performed with the aim to identify the areas where the developed systems were more applicable.
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Njomo, Donatien. "Contribution a l'etude d'un distillateur solaire a effet de serre : modelisation des transferts radiatifs, thermiques et de matiere couples dans un distillateur a ruisselement utilisant un stockage d'energie par chaleur latente." Poitiers, 1987. http://www.theses.fr/1987POIT2274.
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Modelisation des echanges radiatifs et de matiere couples regissant le fonctionnement d'un distillateur solaire a effet de serre. On etablit des correlations empiriques permettant d'evaluer le gisement solaire de poitiers. Sur le plan technique, on ameliore le rendement d'un distillateur classique a ruissellement de type courants croises : a(avec la circulation en aller-retour du liquide a distiller), b(en utilisant un echangeur pour prechauffer la solution a distiller), c(en utilisant un stokage d'energie par chaleur latente). Traitement numerique des parametres de la distillation solaire. Comparaison aux resultats experimentaux obtenus avec un simulateur de raisonnement
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Amadou, Haoua. "Modélisation du séchage solaire sous serre des boues de stations d'épuration urbaines." Université Louis Pasteur (Strasbourg) (1971-2008), 2007. https://publication-theses.unistra.fr/public/theses_doctorat/2007/AMADOU_Haoua_2007.pdf.
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Système adapté pour les stations de petites et moyennes capacités de moins de 100. 000 EH, le séchage solaire s’est rapidement imposé comme une solution efficace de déshydratation des boues permettant de répondre aux attentes des collectivités dans le respect des contraintes réglementaires. Toutefois les règles de dimensionnement et de conception de ce procédé restent d’une part très empiriques, et d’autre part trop rudimentaires pour traduire la complexité des phénomènes physiques mis en jeu. Cette thèse s’inscrit donc dans une optique d’amélioration et d’optimisation des méthodes de dimensionnement et de conception du séchage solaire des boues, en mettant l’accent sur le développement et l’utilisation d’outils de simulation numérique. Après une présentation générale de la problématique des boues résiduaires urbaines en France et de celle du séchage solaire des boues, quelques notions essentielles à l’étude du séchage sont présentées dans le chapitre II. Après une revue des différents types d’eau que l’on trouve dans les boues, le concept d’isotherme de sorption est présenté. Les modes de transport d’eau pendant le séchage sont ensuite rappelés. La fin du chapitre se concentre sur la modélisation de la cinétique du séchage. Le développement d’un modèle numérique simulant le transfert d’eau de la boue lors du séchage solaire sous serre est abordé dans le chapitre III de ce travail. Une mise en équations des différents phénomènes complexes est effectuée. Le modèle développé est constitué de trois équations de bilan d’énergie et d’une de transfert de matière, couplées et non linéaires. Une approche de résolution numérique du problème est également présentée. L’ensemble des dispositifs expérimentaux et des méthodes utilisées tout au long de ce travail est décrit dans le chapitre IV. Basée principalement sur l’utilisation de deux types de modèles réduits (modèles I et II), placés dans une enceinte climatique, la méthode expérimentale fait appel à un plan d’expérience mené en deux étapes, de manière à mieux appréhender le couplage très complexe des différents transferts thermiques et massiques. Le chapitre V est consacré à la validation du modèle numérique. Le premier volet de ce chapitre expose les résultats expérimentaux des paramètres de la boue intervenant dans la modélisation. Des formulations semi-empiriques concernant ces grandeurs (isothermes de désorption et chaleur spécifique massique) ont été proposées. Dans le second volet, les résultats numériques sont confrontés à ceux des expériences. La comparaison s’est avérée souvent très satisfaisante, tant au niveau des transferts couplés de chaleur et de masse qu’au niveau de l’évaluation des vitesses de séchage. Néanmoins, plusieurs phénomènes échappant à la formulation macroscopique et mono dimensionnelle du code ont été évoqués pour expliquer certains écarts entre les simulations et le comportement observé. Le chapitre VI aborde la problématique de l’extrapolation du modèle développé à une installation à l’échelle réelle. La première étape est ainsi consacrée à coupler ce modèle à un générateur de données qui permet de reconstituer au pas horaire une journée climatique « type ». Enfin, quelques paramètres nécessaires à l’extrapolation sont évoqués. Le travail se termine par une conclusion rassemblant l’ensemble des résultats et par l’énoncé de perspectives qui pourraient constituer une suite intéressante à cette étude, notamment la prise en compte des variations spatiales et l’adaptation du modèle dans l’objectif du développement d’un outil de dimensionnement ou d’optimisation de sites industrielsSolar drying method has quickly stood out as an effective solution for the dehydration of the sludge produced by waste water treatment plants built for less than 100. 000 pop. Eq. It allows small communities to fill up the lawful constraints. However the design rules of this process remain empirical and do not take in account the complexity of the involved physical phenomena. Thus, this thesis presents an improvement and an optimization of the design using numerical simulation tools. After a general presentation of the problems of urban residual sludge in France and those concerning solar drying of sludge, some essential concepts in the study of the drying are presented in chapter II. After a review of the various types of water that can be found in sludge, the concept of sorption isotherm is introduced. The ways of transport of water during the drying are then pointed out. The end of the chapter focuses on the modelling of the kinetics of drying. The development of a numerical model, simulating the transfer of sludge water during the solar drying under greenhouse, is described in chapter III. A setting of the equations of the various complex phenomena is carried out. The developed model consists in writing three equations of assessment of energy and one of transfer of matter, coupled and nonlinear. A numerical approach of resolution of the problem is also presented. Experimental devices and methods used throughout this work are described in chapter IV. Based mainly on the use of two types of small-scale models (model I and II), placed in a climatic chamber, the experimental method calls upon an experimental design carried out in two stages, so as to better apprehend the very complex coupling of the various thermal and mass transfers. Chapter V is devoted to the validation of the numerical model. The first part of this chapter exposes the experimental results of the parameters of sludge involved in modelling. Semi-empirical formulations concerning these sizes (isothermal of desorption and mass specific heat) were proposed. In the second part, the numerical results are compared with those of the experiments. The comparisons are often very satisfactory, as well for the transfers coupled of heat and mass as with the evaluation speeds of drying. Nevertheless, several phenomena escaping from the macroscopic and monodimensional formulation are mentioned to explain some differences between simulations and the observed behaviour. Chapter VI approaches the problems of the extrapolation of the developed model to an installation on a real scale. The first stage is devoted to couple this model with a generator of data, which makes it possible to reconstitute with a time step a climatic day "type". Finally, some parameters necessary to extrapolation are mentioned. This Work ends by a conclusion collecting all the results and the statement of prospects, which could constitute an interesting continuation with this study, in particular to take into account the space variations, and the adaptation of the model aiming the development of a tool of dimensioning or optimization of industrial site
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Amadou, Haoua Sapin Rémy. "Modélisation du séchage solaire sous serre des boues de stations d'épuration urbaines." Strasbourg : Université Louis Pasteur, 2007. http://eprints-scd-ulp.u-strasbg.fr:8080/742/01/AMADOU_Haoua_2007.pdf.
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Grozdanov, Mitko. "Détermination théorique des distributions spatio-temporelles des températures de l'enceinte d'une serre et de son sous-sol." Perpignan, 1986. http://www.theses.fr/1986PERP0018.
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L'auteur propose un programme de calcul, capable de determiner les distributions des temperatures et leur evolution avec le temps sur l'enceinte d'une serre et dans son sous-sol. Il en deduit les puissances solaires absorbees et les quantites de chaleur sensible stockees dans les differentes parties de l'enceinte delimitant la serre et dans le sous-sol ainsi que la temperature moyenne de son air. La modelisation suppose que la serre est fermee, que l'air interieur est homogene, et que la transmission du rayonnement a travers la couverture s'effectue de facon diffuse. Elle prend en compte la condensation de la vapeur sur les deux faces de la couverture et le caractere tridimensionnel de la conduction dans le sous-sol.
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Demeule, Elizabeth. "Effet répressif de Bacillus subtilis et de Bacillus pumilus envers Rhizoctonia solani sur tomate et concombre de serre." Master's thesis, Université Laval, 2020. http://hdl.handle.net/20.500.11794/66758.
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Les agents phytopathogènes telluriques constituent un problème majeur touchant les productions serricoles de concombre (Cucumis sativus L.) et de tomate (Solanum lycopersicum L.). Les traitements biologiques efficaces sont limités pour lutter contre ces agents pathogènes. Cette étude avait pour objectifs d’évaluer (1) l’effet antagoniste in vitro de Bacillus pumilus Meyer et Gottheil souche PTB180 et Bacillus subtilis (Ehrenberg) Cohn souche PTB185 envers Rhizoctonia solani J.G. Kühn, Pythium ultimum Trow, Sclerotinia sclerotiorum (Lib.) de Bary, Phytophthora capsici Leonian, Fusarium oxysporum Schltdl. et F. oxysporum f.sp. radicis-lycopersici Jarvis & Shoemaker, (2) l’effet répresseur d’une application préventive des bactéries sur la pourriture du collet et la fonte des semis causées par R. solani, sur concombre ou tomate en serre et (3) l’effet des bactéries sur la croissance et la productivité des plants de tomate cultivés en serre. Lors des essais in vitro, PTB180 et PTB185, utilisés seuls et en mélange (1:1), ont fortement inhibé la croissance mycélienne des six agents phytopathogènes. Sur plantules de concombre et de tomate, le mélange (1:1) des deux souches a permis une réduction significative (p<0,05) de la sévérité des symptômes de la pourriture du collet. PTB185 et le mélange (1:1) des deux souches ont augmenté significativement la hauteur et la masse sèche des plants infectés par R. solani. Les essais sur graines de tomate montrent que PTB180 a augmenté significativement le taux de levée des graines et que PTB185 a réduit significativement la mortalité post-levée tout en favorisant la croissance des plantules. Les tests réalisés sur plants de tomate sains n’ont pas montré d’effet significatif de PTB180 et PTB185 sur la croissance et la productivité des plants. Les bactéries à l’étude pourraient éventuellement représenter une alternative aux fongicides de synthèse pour lutter contre les agents phytopathogènes.
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Makhlouf, Saïd. "Expérimentation et modélisation d'une serre solaire à stockage par chaleur latente assisté par pompe à chaleur de déshumidification." Nice, 1988. http://www.theses.fr/1988NICE4180.
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Résultats de mesures thermiques obtenus sur une saison de chauffe dans la serre CREAT-CNRS de La Baronne. L'air humide a été choisi comme fluide caloporteur avec un contrôle de l'humidité nocturne. Modélisation numérique complète des transferts de chaleur traitant de la fonction du sol, de l'échangeur stockeur à plaques et des pompes à chaleur de déshumidification en série sur le circuit d'air nocturne
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Kahia, Mouna. "Lutte biologique contre deux pucerons ravageurs en serre (Aphis gossypii et Aulacorthum solani) par l'utilisation des microorganismes du sol." Master's thesis, Université Laval, 2019. http://hdl.handle.net/20.500.11794/35001.
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Le puceron de la digitale Aulacorthum solani (Kaltenbach) et le puceron du melon Aphis gossypii (Glover) sont parmi les pucerons les plus nuisibles pour les cultures en serre. La lutte biologique microbienne pourrait constituer une voie efficace contre ces insectes. La combinaison de différents agents microbiens peut augmenter leur efficacité. Ce travail évalue l’efficacité de Beauveria bassiana ANT-03, Bacilluspumilus PTB180 et B. subtilis PTB185, utilisés individuellement ou mélangés, pour contrôler A. gossypii et A. solani sur concombre et tomate, respectivement. En laboratoire, dix larves L2 de chaque puceron ont été placées dans des plats de Petri contenant une feuille de tomate ou une rondelle de feuille de concombre fixée dans la gélose. Ces larves ont été pulvérisées avec 1 mL de suspensions préparées selon le traitement (Témoin , B.pumilus, B. subtilis, B. bassiana, B. pumilus + B. subtilis, B. bassiana + B. pumilus, B. bassiana +B. subtilis, B. bassiana + B. pumilus + B. subtilis). Les mêmes traitements utilisés en laboratoire ont été appliqués en serre, mais des pucerons adultes ont été utilisés. Les résultats des essais en laboratoire et en serre ont révélé qu’en causant la mortalité de A. solani et en affectant la reproductionde A. gossypii, les deux bactéries (B. pumilus PTB180 et B. subtilis PTB185) ont pu démontrer un effet aphicide comparable à celui du produit commercial (Bioceres) contenant le champignon. Lorsqu’utilisé en mélange, aucun effet additif entre les trois microorganismes étudiés n’a été observé. Les essais de suivi de la survie des spores de deux bactéries et du champignon conduits en serre ont démontré qu’ils gardent un niveau de population de 106 CFU/g de feuilles fraîche jusqu’à neuf jours après leur application, même quand ils ont été mélangés. Ainsi, sur plantes, les deux Bacillus n’exposent pas un effet antifongique envers B. bassiana ANT-03The foxglove aphid Aulacorthum solani (Kaltenbach) and the melon aphid Aphis gossypii (Glover) are among the most harmful aphids for greenhouse crops. Microbial biological control may be an effective method against these insects. The combination of different microbial agents can increase their efficiency. This work evaluates the efficacy of Beauveria bassiana ANT-03, Bacillus pumilus PTB180 and B. subtilis PTB185, used individually or in combination, to control A. gossypii and A. solani on cucumber and tomato, respectively. In the laboratory, ten L2 larvae of each aphid were placed in Petri dishes containing a tomato leaf or a cucumber leaf disc fixed in the agar plate. These larvae were sprayed with 1 mL of suspensions prepared according to the treatment (Control, B. pumilus, B. subtilis, B. bassiana, B. pumilus+ B. subtilis, B. bassiana+ B. pumilus, B bassiana+B. subtilis, B. bassiana+ B. pumilus+ B. subtilis). The same treatments used in the laboratory were applied in the greenhouse, but adult aphids were used. Laboratory and greenhouse test results revealed that by causing A. solani mortality and by affecting A. gossypii reproduction, both bacteria (B. pumilus PTB180 and B. subtilis PTB185) were able to demonstrate aphicide effect equivalent to that of the commercial product (Bioceres) containing the fungus. When used as a mixture, no additive effect between the three microorganisms studied was observed. Spore survival tests of the two bacteria and the fungus conducted in a greenhouse have shown that they retain a high level of population 106CF U/g fresh leaves up to nine days after the application when used alone or as a mixture. Thus, on plants, the two bacilli do not exhibit antifungal effect against B. bassiana ANT-03.
puceron de la digitale, puceron tacheté de la pomme de terre, puceron du melon, puceron du cotonnier
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Santos, Fernando Hoefling dos. "Rendimento de módulos fotovoltaicos sob condições específicas do espectro solar incidente na Serra Gaúcha." reponame:Repositório Institucional da UCS, 2016. https://repositorio.ucs.br/handle/11338/1258.
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O intuito desta dissertação é determinar qual o grau de influência que as condições meteorológicas e geográficas da cidade de Farroupilha apresentam sobre a capacidade de produção de energia fotovoltaica e também sobre o rendimento das três principais tecnologias (monojunção) de módulos para conversão fotovoltaica presentes no mercado mundial (silício monocristalino, silício policristalino e filme fino de silício amorfo) e, por conseguinte, no correto dimensionamento de sistemas de cogeração conectados à rede de distribuição de energia elétrica local. O comportamento das diferentes tecnologias de painéis fotovoltaicos será determinado através das respostas espectrais, obtidas através da digitalização de gráficos ensaiados por instituição internacionalmente reconhecida (Fraunhofer ISE CalLab PV Cells) e a geração dos espectros médios mensais da radiação solar será determinada através da inserção dos dados meteorológicos de quinze anos de medições fornecidos pelo Instituto Nacional de Meteorologia e ensaiados sobre o software SMARTS 2.9.2 (Simple Model of the Atmospheric Radiative Transfer of Sunshine). Dessa forma, foi possível verificar um aumento médio anual de 2,04% na corrente de curto-circuito para o módulo de silício monocristalino, 2,14% para o módulo de silício policristalino e 8,2% para o módulo de filme fino de silício amorfo; seguida de uma variação média anual na eficiência de conversão desses módulos fotovoltaicos de -1,75%, -1,66% e +4,19% respectivamente. Através do dimensionamento com as condições de rendimento sob a influência do espectro padrão (G173) e sob a influência particular do espectro da região da serra gaúcha, foi determinado qual dessas tecnologias apresenta as melhores características e menor tempo de retorno do investimento para as condições climáticas e geográficas específicas da cidade de Farroupilha, RS.Submitted by Ana Guimarães Pereira (agpereir@ucs.br) on 2016-08-09T16:44:50Z No. of bitstreams: 1 Dissertacao Fernando Hoefling dos Santos.pdf: 5909898 bytes, checksum: e3aa88fe0fb36955bd8101d0b8f4c0e8 (MD5)
Made available in DSpace on 2016-08-09T16:44:50Z (GMT). No. of bitstreams: 1 Dissertacao Fernando Hoefling dos Santos.pdf: 5909898 bytes, checksum: e3aa88fe0fb36955bd8101d0b8f4c0e8 (MD5) Previous issue date: 2016-08-09
The purpose of this work is to determine the degree of influence that the meteorological and geographical conditions of Farroupilha city feature on the photovoltaic energy production capacity and also on the efficiency of the three main modules technologies for photovoltaic conversion present in the world market and, therefore, in the correct sizing of cogeneration systems connected to the local power grid. The behavior of the different technologies of photovoltaic panels will be determined by the spectral responses obtained by scanning graphic tested by internationally recognized institution and the generation of monthly average spectra of solar radiation is determined by the insertion of meteorological data of fourteen years of measurements provided by National Institute of Meteorology and tested on the SMARTS software 2.9.2 (Simple Model of the Atmospheric Radiative Transfer of Sunshine). Thus, we found an average annual increase of 2.04% in the short-circuit current to the monocrystalline silicon module, 2.14% for polycrystalline silicon module and 8.2% for thin film module amorphous silicon; followed by an average annual variation in the conversion efficiency of these photovoltaic modules -1.75%, -1.66% and + 4.19% consecutively. It will be executed sizing with performance conditions under the influence of the standard spectrum (G173-03) and under the particular influence of the spectrum of the Serra Gaúcha region, it was determined which of these technologies has the best features and lower return time of the investment to the specific climatic and geographic conditions of the city of Farroupilha, RS.
Books on the topic "Serre solari"
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Pierce, John H. Les serres à l'énergie solaire: Pour la maison, l'arrière-cour ou l'appartement. L'Acadie [Québec]: Éditions Broquet, 1994.
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J, Monk G., and Canada. Ministère de l'agriculture. Direction générale de la recherche., eds. Serres solaires commerciales. Ottawa, Ont: Direction générale de la recherche, Agriculture Canada, 1987.
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The homeowner's complete handbook for add-on solar greenhouses & sunspaces: Planning, design, construction. Emmaus, Pa: Rodale Press, 1985.
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Frappi, Carlo, and Fabio Indeo. Monitoring Central Asia and the Caspian Area. Venice: Edizioni Ca' Foscari, 2019. http://dx.doi.org/10.30687/978-88-6969-376-2.
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Il presente volume della serie «Eurasiatica. Quaderni di Studi su Balcani, Anatolia, Iran, Caucaso e Asia Centrale» è interamente dedicato all’area centro-asiatica e caspica. Scopo del volume è di catturare e restituire al lettore una parte delle rilevanti trasformazioni istituzionali, politiche ed economiche che stanno interessando l’area centro-asiatica. Lungi dal rivolgersi ai soli studiosi d’area, il volume muove dal presupposto che guardare all’Asia centrale aiuti a comprendere dinamiche che trascendono i confini della regione, a inquadrare cioè processi e tendenze che caratterizzano il sistema internazionale post-bipolare e la più ampia convivenza nello spazio eurasiatico. Intercettare e rappresentare queste dinamiche e questi temi è lo scopo del presente volume, che – sullo sfondo del crescente interesse istituzionale e imprenditoriale italiano verso l’area – mira non secondariamente a delineare gli interessi e le priorità di azione del Sistema Paese nei rapporti con gli interlocutori centro-asiatici e caspici.
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Murcia, Humberto Rodriguez. Manual de radiacion solar en Colombia (Serie Sobre energia). H. Rodriguez & F. Gonzalez, 1994.
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Manchon, Frank J. Solaris : la Batalla Final: Novelas Cortas Serie Behemoth Ascending Primera Parte. Independently Published, 2019.
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Fadhel, Abdelhamid, and Sami Kooli. Performance des Serres: Dans le séchage solaire des produits agroalimentaires. Omniscriptum, 2014.
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Fisher, Rick, and Bill Yanda. The Food and Heat Producing Solar Greenhouse: Design, Construction and Operation. Echo Point Books & Media, 2016.
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Fisher, Rick, and Bill Yanda. The Food and Heat Producing Solar Greenhouse: Design, Construction and Operation. Echo Point Books & Media, 2016.
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All Electric America: A Climate Solution and the Hopeful Future. Solar Flare Press, 2016.
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Roy, Riya, Abdullah Al Jubayer, Kazi Sadman Sakib, Najmus Sakib, Avijit Saha, M. Rezwan Khan, and M. Shahedul Alam. "Policy Options While Increasing Share of Renewable Energy: Technology Choices for Peaking Power in the Context of Bangladesh." In Energiepolitik und Klimaschutz. Energy Policy and Climate Protection, 67–86. Wiesbaden: Springer Fachmedien Wiesbaden, 2022. http://dx.doi.org/10.1007/978-3-658-38215-5_4.
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AbstractIn Bangladesh, the peaking power plants that serve the peak time loads use conventional fossil fuels for power generation. These power stations remain idle for a good part of their operating life, which therefore results in a high overhead cost. Continuous integration of renewables into the grid is increasing the dependency on these, so far, feasibility of no other less-expensive options has been studied. In this context, this paper aims to analyze the financial feasibility of different alternative options. Three possible options were analyzed and the levelized cost of energy (LCOE) was compared with that of conventional peaking power plants. It was found that Battery-based storage systems are not financially feasible at this moment, while the nation’s lone hydro power plant promises financial feasibility if solar PV driven pumped hydro storage is implemented. We also report that if the nation continues to add solar PV power stations even with costly peaking power plants using traditional fuels, this hybrid option was counter intuitively found to be financially feasible.
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Gil, Juan D., Lidia Roca, José L. Guzmán, Manuel Berenguel, and Andrés López-Palenzuela. "Un enfoque de control libre de modelo para el control de temperatura en hornos solares." In XLIII Jornadas de Automática: libro de actas: 7, 8 y 9 de septiembre de 2022, Logroño (La Rioja), 360–67. 2022nd ed. Servizo de Publicacións da UDC, 2022. http://dx.doi.org/10.17979/spudc.9788497498418.0360.
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En el contexto de síntesis de materiales y pruebas de estrés térmico, los hornos solares cobran un papel fundamental. Estos sistemas experimentales se suelen operar normalmente de forma manual por operadores cualificados. Sin embargo, el uso de controladores automáticos puede ser esencial para tener en cuenta las diferentes dinámicas de las piezas tratadas, seguir los diferentes perfiles de temperatura requeridos en las pruebas y hacer frente a la intermitencia de la fuente principal de energía, la energía solar. Sobre estas bases, el presente trabajo propone un sistema de control libre de modelo sencillo y con pocos parámetros de ajuste para el control de temperatura en hornos solares. El controlador se basa en la metodología Extremum Seeking Control (ESC) y se complementa con un controlador por adelanto en configuración serie para el rechazo de perturbaciones de radiación. La estrategia propuesta se ha probado en simulación en un modelo validado del horno SF60 de la Plataforma Solar de Almería, usando datos meteorológicos reales de dicho emplazamiento. A pesar de que la técnica ESC puede tener problemas de convergencia en presencia de perturbaciones rápidas, la inclusión del controlador por adelanto en serie hace que los resultados obtenidos pongan de manifiesto el buen desempeño del controlador, tanto para el seguimiento de referencias como para el rechazo de perturbaciones. Además, evidencian su fácil sintonía, lo que puede llegar a ser fundamental para su uso en la práctica por operadores que no sean expertos en el campo de la ingeniería de control.
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Rosa, Antonio Robson Oliveira da, Leonardo Beroldt, and Rafael Haag. "ANÁLISE PRÉVIA DO VALOR DA DEPENDÊNCIA DO SOLO PARA AS ATIVIDADES AGRÍCOLAS COM A POSSÍVEL IMPLANTAÇÃO DO PARQUE EÓLICO DA SERRA, EM SÃO FRANCISCO DE PAULA, RS." In Energia solar e eólica, 367–78. Antonella Carvalho de Oliveira, 2019. http://dx.doi.org/10.22533/at.ed.66719220125.
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Rwegasira, Diana Severine, Imed Saad Ben Dhaou, Aron Kondoro, Anastasia Anagnostou, Amleset Kelati, Shililiandumi Naiman, Simon J. E. Taylor, Nerey H. Mvungi, and Hannu Tenhunen. "A Demand-Response Scheme Using Multi-Agent System for Smart DC Microgrid." In Research Anthology on Smart Grid and Microgrid Development, 700–720. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-3666-0.ch030.
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This article describes a framework for load shedding techniques using dynamic pricing and multi-agent system. The islanded microgrid uses solar panels and battery energy management system as a source of energy to serve remote communities who have no access to the grid with a randomized type of power in terms of individual load. The generated framework includes modeling of solar panels, battery storage and loads to optimize the energy usage and reduce the electricity bills. In this work, the loads are classified as critical and non-critical. The agents are designed in a decentralized manner, which includes solar agent, storage agent and load agent. The load shedding experiment of the framework is mapped with the manual operation done at Kisiju village, Pwani, Tanzania. Experiment results show that the use of pricing factor as a demand response makes the microgrid sustainable as it manages to control and monitor its supply and demand, hence, the load being capable of shedding its own appliances when the power supplied is not enough.
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Bahadur, Amar. "Current Status of Fusarium and Their Management Strategies." In Fusarium - An Overview on Current Status of the Genus [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.100608.
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Fusarium spp. is one of the most economically important plant pathogens causing a wide range of plant diseases with significant crop losses globally. Fusarium wilt is a major problem all over the world. Fusarium oxysporum, Fusarium solani, Fusarium fujikuroi are economic importance species in worldwide. Fusarium solani causing disease in many agriculturally crops and favored by high temperatures and warm moist soils. The fungus produces three types of asexual spores; microconidia, macroconidia and chlamydospores serve as propagules in infecting host plants and found endophytes and saprophytes. The color of the colony, length and shape of the macroconidia, the number shape of microconidia and the presence or absence of chlamydospores are key features for the differentiation of Fusarium species. Pathogens, forms over 100 formae speciales cause disease in dicot and monocot plant species and infecting a variety of hosts. Vegetative compatibility Groups (VCG) is used to differentiate their races. Resistant cultivars and bio-control agents (Trichoderma spp., and Psedomonas spp.) have been used to manage the disease.
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Moore Bernstein, Jennifer, Cameron Audras, Charmaine Dalisay, and Jennifer Swift. "A Multi-Disciplinary Undergraduate Pedagogical Experience Looking at Attitudes Towards Solar Development in the Mojave Desert." In Pedagogy - Challenges, Recent Advances, New Perspectives, and Applications [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.101248.
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This research project aimed to integrate geography, spatial analysis, environmental studies, and social psychology to understand conflicts over solar development in the Mojave Desert region. A second objective was to empower the participating undergraduate student researchers with a deep-learning experience using multidisciplinary tools. This project ran from 2019 to 2021 under the Undergraduate Research Associates Program (URAP) at the University of Southern California. The students conducted site suitability analysis, survey research, interviews, and field studies. Results combined spatial analysis, attitudinal surveys, mapping, and detailed accounts of the students’ learning experiences. An important conclusion of this project was the discovery of a discrepancy between broad support for solar development at the state and national level, and a suspicion at the local level The student researchers went on to present multiple conferences and receive awards, and based on this project, both decided to attend graduate school in environmental studies and sciences. Recommendations for further research include interpolation of attitudes toward solar development, conducting a demographically representative survey, and participatory mapping. This approach can serve as a pedagogical strategy for other institutions, as students are increasingly eager to address environmental problem solving from the perspective of both the natural and social sciences.
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Kaur Channi, Harpreet. "Techno Economic Feasibility Analysis of Solar PV System in Jammu: A Case Study." In Solar Cells [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98809.
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Renewable sources of energy and related technologies are essential to the generation of energy worldwide. The photovoltaic (PV) is one of the renewable power technologies that support household electricity use. No prior research has studied the sustainability of the off-grid energy generation system in Jammu, India despite the potential of solar photovoltaics and significant amounts of global sun radiation in an area. The present work shown in the chapter is to calculate the residential load of the Patyari Kaltan situated in district Samba of Jammu by energy auditing. The NASA Surface Meteorology is used for the solar resource informationof selected village. The primary sources of electricity generation are fossil fuels. Recently, the energy demand and availability deficit has worsened due to the huge population and fossil fuels cannot fulfill huge energy requirement. Meanwhile they have negative impacts on the environment as well. Therefore, renewable energy offers suitable energy way out to the residents living in remote areas and in the areas near to Borders. In this paper the main aim is to examine the feasibility of solar-battery hybrid energy system to fulfill electrical demand of a residential area in a rural region in Jammu. The research shows that the cost of construction of the project can be repaid or recovered within 1 year 6 months. To accomplish the target, 214 solar panels of 325 watt are estimated to satisfy the demand 100 percent at all times. The findings of this modeling reveal that the off-grid PV system is both technical and economically viable for power generation; they may serve as a model for the successful development of the system for practical use. Furthermore, the model can promote assistance mechanisms for players in the renewable industry to introduce a PV system in residential buildings.
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Vintila, Teodor, Eniko Gaspar, Maria Mihaela Antofie, Luca Magagnin, Adina Berbecea, and Isidora Radulov. "Biorefinery for Rehabilitation of Heavy Metals Polluted Areas." In Heavy Metals - Recent Advances [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.109626.
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Biorefinery applied in heavy metals polluted lands proposed here describes a process starting from soil (polluted and unfit for food and feed production) and solar energy stored in carbohydrates (regarded here as a solar energy carrier) to deliver liquid and gaseous biofuels, green building block chemicals for the market and return the rest of the matter (not delivered to the market) as fertilizer and soil improver, extracting the heavy metals from the polluted soil for safe reuse and remediating the land to sustainably deliver resources in a circular bioeconomy. The circular economy proposed in this chapter offers a novel approach to land rehabilitation by investigating the opportunity for economic value creation as an integral part of a rehabilitation strategy and production of biomaterials and biofuels as renewable energy carriers. The case study approached here can be developed in a complete circular biorefinery process and value chain enabling the use of heavy metals polluted lands for production of renewable energy and biomaterials and at the same time serve as a means of rehabilitation of contaminated lands. This biotechnology can be transferred and adapted in other areas improper for food/feed production due to contamination human industrial activity.
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Sancar, Muhammet Raşit. "Renewable Energy Sources and Energy Storage." In Versatile Approaches to Engineering and Applied Sciences: Materials and Methods. Özgür Yayınları, 2023. http://dx.doi.org/10.58830/ozgur.pub50.c69.
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The energy sector in the world is undergoing great changes and energy transformation is the key point of the technical, economic and political agenda of all countries of the world. In this study, various technologies such as hydroelectric, wind, solar, biomass, geothermal and wave energy are discussed by examining renewable energy sources. In addition, energy storage systems are also discussed, and electromagnetic, mechanical and electrochemical storage technologies are introduced. The use of these technologies is important in meeting future energy needs while protecting the environment, society, economy, and the welfare of future populations. However, the high costs of energy storage technologies make them uneconomical under current market conditions. This study provides a brief informative summary of renewable energy sources and energy storage systems, and aims to serve as a resource for those who wish to conduct research in this field.
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Naseer, Fawad, Akhtar Rasool, M. Zia Qammar, and Rafay Shahood. "Solar Powered 4-Wheel Drive Autonomous Seed Sowing Robot for Rough Terrain." In Intelligent Environments 2021. IOS Press, 2021. http://dx.doi.org/10.3233/aise210104.
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In the era of fourth industrial revolution, automation is a growing trend in almost every industry. The innovation in agriculture equipment is one of the major phase for civilized life, and the development of agricultural tools is a fundamental need towards the improvement of agriculture. Farmers use the same traditional methods and equipment for all ages, for example: seeds, spraying, weeding, etc., which have problems such as slow growth rate, irrigation, fertilization, crop monitoring of large areas. An autonomous, low-maintenance and portable robot can serve this purpose more accurately and efficiently with much better performance output. This article introduces the proposed model and design of a solar powered 4-wheel drive robot which works to plant seeds while cultivating the soil in a multi terrain surface. The robot avoids human effort ranging from the field path following to uniformly sowing of seeds at equal distance intervals using field area constraints prescribed by the farmer. This article presents the step by steps designing a robot and the parameters to be considered before creating a prototype. This robot increases the efficiency of seeding by exact measurement and distance, flattening of a surface, spraying of initial water, and also reduces random spreading of seeds problems.
Conference papers on the topic "Serre solari"
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Liu, Wei, Jane H. Davidson, F. A. Kulacki, and Susan C. Mantell. "Natural Convection From a Horizontal Tube Heat Exchanger Immersed in a Tilted Enclosure." In ASME Solar 2002: International Solar Energy Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/sed2002-1037.
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Heat transfer rates of a single horizontal tube immersed in a water-filled enclosure tilted at 30 degrees are measured. The results serve as a baseline case for a solar water heating system with a heat exchanger immersed in an integral collector storage. Experiments are conducted for isothermal and stratified enclosures with both adiabatic and uniform heat flux boundary conditions. Natural convection flow in the enclosure is interpreted from measured water temperature distributions. Formation of an appropriate temperature difference that drives natural convection is determined. Correlations for the overall heat transfer coefficient in terms of the Nusselt and Rayleigh numbers are reduced to the form NuD = 0.675RaD0.25 for 106 ≤ RaD ≤ 108.
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Koussa, Mustapha, Djohra Saheb, Hamza Belkhamsa, Mohamed Amine Lalaoui, Sid Ali Hakem, Sabrina Sami, Boussaa Zoubir, and Hamane Mustapha. "Effect of parallel and serie connection configuration of solar collector on the solar system performances." In 2015 Sixth International Renewable Energy Congress (IREC). IEEE, 2015. http://dx.doi.org/10.1109/irec.2015.7110957.
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Dall Onder, Letícia Maria Frá, Marta Baltar Alves, and Tiago Cassol Severo. "Aplicação de conceitos edifícios energia zero e um sistema fotovoltaico em uma edificação na serra gaúcha." In XIX ENCONTRO NACIONAL DE TECNOLOGIA DO AMBIENTE CONSTRUÍDO. UFRGS, 2022. http://dx.doi.org/10.46421/entac.v19i1.2141.
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Este artigo visa apresentar a aplicação de conceitos de Edifício Energia Zero (EEZ) incluindo um sistema de energia solar fotovoltaica em um edifício na fase de projeto em Caxias do Sul, RS. Foram utilizadas simulações computacionais com os softwares Sketch Up, EnergyPlus e Solar Edge. A economia no consumo de energia elétrica estimada foi de 11,37%. O dimensionamento foi executado para redução de 9,65% devido ao custo-benefício. O sistema fotovoltaico estima uma geração elétrica de 43,37% com a área disponível. Sugeriu-se a utilização de módulos no solo para atingir o EEZ. A análise financeira estimou o payback em oito anos e cinco meses.
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Souza, Roberta, Ana Carolina Veloso, Gleisson Gurgel, Jessica Santana, Julia Kato, Lorena Oliveira, and Luiza Guinho. "DESEMPENHO LUMÍNICO EM PROJETO AUTOGESTIONADO DE HIS: ESTUDO DE CASO NO CONJUNTO SERRA VERDE." In XVIII ENCONTRO NACIONAL DE TECNOLOGIA DO AMBIENTE CONSTRUÍDO. UFRGS, 2020. http://dx.doi.org/10.46421/entac.v18i.755.
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Comumente projetos de Habitação de Interesse Social possuem estigmas por apresentarem problemas relacionados à eficiência energética e ao conforto ambiental. O objetivo do trabalho consistiu em verificar o desempenho de iluminação natural no apartamento considerado como crítico do Conjunto Serra Verde, Belo Horizonte (MG). O projeto do empreendimento foi desenvolvido a partir de projeto arquitetônico pré-estabelecido pela Prefeitura Municipal de Belo Horizonte modificado em processo de autogestão coordenado por um grupo de profissionais da PUC-Minas e com participação popular para torná-lo mais flexível aos moradores. O trabalho compreendeu três etapas: definição do apartamento crítico; simulação dinâmica da iluminação natural; análise dos resultados a partir de normas de desempenho e métricas de iluminância natural. Pôde-se verificar que as normas de iluminação brasileiras se preocupam com o mínimo de luz necessário, mas não com um máximo e que tal pode implicar em um aumento de consumo de energia elétrica para suprir o desconforto térmico causado pela demasiada entrada de radiação solar. Conclui-se ainda que é possível, através de um processo de autogestão realizar projetos com participação dos usuários que apresentem boa qualidade e que levem em conta as singularidades territoriais, em alternativa ao modelo básico de reprodução utilizado em boa parte do país.
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Lynn, Kevin, Jennifer Szaro, William Wilson, and Michael Healey. "A Review of PV System Performance and Life-Cycle Costs for the SunSmart Schools Program." In ASME 2006 International Solar Energy Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/isec2006-99112.
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In January of 2003, the Florida Department of Environmental Protection/Florida Energy Office (DEP/FEO) allocated $600,000 in hardware funds toward the installation of photovoltaic (PV) solar systems on Florida schools. As a result of this program, grid-connected PV systems less than six kilowatts in size were installed on 29 schools in the State of Florida. The Florida Solar Energy Center (FSEC) has monitored these systems for approximately one year of operation. The performance of 28 of these systems was analyzed using standard performance parameters such as the performance ratio, PV array efficiency, inverter efficiency, and PV system efficiency. In addition, a life-cycle cost analysis was conducted using new cost data values and updated market assumptions. These data will serve as a benchmark to compare against future systems with respect to performance vs. installed system cost.
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Roy, Aharon. "The Green Energy Fraction Parameter for Solar Thermal Power Systems." In ASME 2004 International Solar Energy Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/isec2004-65071.
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A new solar power parameter, the green energy fraction is proposed as a useful metric for project assessment. Its concept is elucidated and the application to solar/fuel hybrid power plants is exhibited by numerical illustrations. This parameter is a simple tool for tracking the actual green energy performance of a particular plant. It proves to serve a significant yardstick for evaluating fuel avoidance, hence the environmental consequences of solar hybrid power plants. The green energy fraction provides a summation of the fuel avoidance for the whole system, simple or complex, and allows comparative evaluation between power plants for upright green energy (fuel avoidance), and thus enables standard assessments of various systems on an equal basis. It has both thermodynamic and engineering meaning and signifies one of the essential figures of merit for solar power systems. It should assist R&D management to improve technologies. Green energy entitles substantial financial benefits.
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Chen, Huajun, Yitung Chen, Hsuan-Tsung Hsieh, Greg Kolb, and Nathan Siegel. "Numerical Investigation on Optimal Design of Solid Particle Solar Receiver." In ASME 2007 Energy Sustainability Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/es2007-36134.
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Solar thermo-chemical processes often require high temperatures that can be achieved by direct absorption of solar energy. The solid particle solar receiver can be used to heat ceramic particles that may serve as a heat transfer and storage medium or as a substrate on which chemical reaction may be performed directly. Using solid particles enclosed in a cavity to absorb concentrated solar radiation can provide efficient absorption of concentrated sunlight. In this work, different solid particle solar receiver designs have been investigated by using computation fluid dynamics (CFD) technique. The gas particle flow with the solid particle solar receiver was simulated by using two-way coupled Euler-Lagrange method. The direct illumination energy source that results from incident solar radiation was predicted by a solar load model using a solar ray tracing algorithm. The detailed information to guide the experiment, such as the particle and gas velocity, temperature, particle solid volume fraction, and cavity efficiency under different designs has been analyzed.
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Kodama, Tatsuya, Yumiko Nakamuro, Takayuki Mizuno, and Ryuji Yamamoto. "A Two-Step Thermochemical Water Splitting by Iron-Oxide on Stabilized Zirconia." In ASME 2004 International Solar Energy Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/isec2004-65063.
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The thermochemical two-step water splitting cycle was examined by using an iron oxide supported on yttrium-stabilized, cubic zirconia (YSZ) as the working material, for the purpose of directly converting solar high-temperature heat to clean hydrogen energy. In the first step of the cycle, the YSZ-supported Fe3O4 was thermally decomposed to the reduced phase at 1400 °C under an inert atmosphere. The reduced solid phase was oxidized back to the original phase (the YSZ-supported Fe3O4) with steam to generate hydrogen below 1000 °C. A new redox pair examined by others was found to serve as the working solid material on this YSZ-supported Fe3O4, as follows. The Fe3O4 reacted with YSZ to produce an Fe2+-containing ZrO2 phase by releasing oxygen molecules in the first step: the Fe2+ ions entered into cubic YSZ lattice. In the second step, the Fe2+-containing YSZ generated hydrogen via steam splitting to reproduce Fe3O4 on the cubic YSZ support. This cyclic reaction could be repeated with a good repeatability of the reaction below 1400 °C.
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Phelan, P. E., R. Taylor, R. Adrian, R. S. Prasher, and T. Otanicar. "Photothermal Energy Conversion in Liquid Nanoparticle Suspensions." In ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels collocated with 3rd Joint US-European Fluids Engineering Summer Meeting. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30172.
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Liquid nanoparticle suspensions, popularly termed “nanofluids,” have been the subject of numerous investigations because of their interesting thermal transport properties. Their propensity to scatter and absorb electromagnetic radiation enables other applications that can take advantage of both their radiative and thermal transport properties. In particular, we are working to develop direct-absorption solar thermal collectors in which nanofluids serve to absorb incident sunlight, thus heating the fluid directly and more efficiently than conventional solar collectors. Our experimental results, in which we irradiate nanofluids with a continuous-wave laser, demonstrate that boiling can be induced at lower incident light fluxes compared to a thin layer of pure water in front of a black absorptive backing. These findings suggest that improved solar energy conversion systems can be developed, including solar-driven direct-steam generators.
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Maag, Gilles, Francisco Javier Gutierrez, Wojciech Lipinski, and Aldo Steinfeld. "Thermal Dissociation of CH4 Using a Particle-Flow Chemical Reactor Exposed to Concentrated Solar Radiation." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66792.
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The performance of a 5 kW particle-flow chemical reactor for the co-production of H2 and C by thermal decomposition of CH4 is investigated using concentrated solar radiation as the energy source of high-temperature process heat. The solar reactor features a directly-irradiated flow of CH4 laden with carbonaceous particles that serve the functions of radiant absorbers and nucleation sites for the heterogeneous cracking reaction. Main operational parameters are the solar power input, CH4 mass flow rate, and solid phase volume fraction. Their effect on the chemical conversion and solid products’ characteristics are examined for active carbon and carbon black laden particles. Higher particle volume fraction resulted in higher radiative absorption and enhanced kinetics.
Reports on the topic "Serre solari"
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Fahr, Sven, Daniel Tschopp, Jan Erik Nielsen, Korbinian Kramer, and Philip Ohnewein. Review of In Situ Test Methods for Solar Collectors and Solar Collector Arrays. IEA SHC Task 55, December 2020. http://dx.doi.org/10.18777/ieashc-task55-2020-0014.
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This fact sheet presents three in situ test methods for solar collectors and solar collector arrays, namely In situ Collector Certification (ICC), Performance Check for Collector Arrays (PC) and Dynamic Collector Array Test (D-CAT). A comparison is made regarding their scopes and use cases, methodologies and outcomes, which could serve as a decision-making aid for stakeholders in selecting the procedure that best suits their needs. The analysis shows that the methods do not contradict, but rather complement each other.
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Furman, Burford, Laxmi Ramasubramanian, Shannon McDonald, Ron Swenson, Jack Fogelquist, Yu Chiao, Alex Pape, and Mario Cruz. Solar-Powered Automated Transportation: Feasibility and Visualization. Mineta Transportation Institute, December 2021. http://dx.doi.org/10.31979/mti.2021.1948.
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A solar-powered automated transportation network (ATN) connecting the North and South campuses of San José State University with three passenger stations was designed, visualized, and analyzed in terms of its energy usage, carbon offset, and cost. The study’s methodology included the use of tools and software such as ArcGIS, SketchUp, Infraworks, Sketchup, Rhinoceros, and Autodesk 3DS Max. ATN vehicle energy usage was estimated using data from the university’s Park & Ride shuttle bus operation and by modeling with SUMOPy, the advanced simulation suite for the micro-traffic simulator SUMO. The energy study showed that an extensive solar photovoltaic (PV) canopy over the guideway and stations is sufficient for the network to run 24/7 in better-than-zero net-metered conditions—even if ridership were to increase 15% above that predicted from SJSU Park & Ride shuttle data. The resulting energy system has a PV-rated output of 6.2 MW, a battery system capacity of 9.8 MWh, and an estimated cost of $11.4 million USD. The solar ATN also produces 98% lower CO2 and PM2.5 emissions compared to the Park & Ride shuttle bus. A team of experts including urban planners, architects, and engineers designed and visualized the conceptual prototype, including a comprehensive video explaining the need for solar ATN and what a typical rider would experience while utilizing the system. This research demonstrates both benefits and challenges for solar-powered ATN, as well as its functionality within the urban built environment to serve diverse San José neighborhoods.
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Konstantinou, Theodora, Diala Haddad, Akhil Prasad, Ethan Wright, Konstantina Gkritza, Dionysios Aliprantis, Steven Pekarek, and John E. Haddock. Feasibility Study and Design of In-Road Electric Vehicle Charging Technologies. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317353.
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Electric Roadways (ERs) or Dynamic Wireless Charging (DWC) lanes offer an alternative dynamic and wireless charging method that has the potential of giving electric vehicles (EV) limitless range while they are moving. Heavy-duty vehicles (HDVs) are expected to be early adopters of the DWC technology due to the higher benefits offered to these vehicles that are traveling on fixed routes. The goal of this project was to assess the feasibility of ERs in Indiana and design a test bed for in-road EV charging technologies. The most suitable locations for implementing DWC lanes were identified on interstates that are characterized by high truck traffic. Using I-65 S as a case study, it was found that DWC can be economically feasible for the developer and competitive for the EV owner at high and medium future projections of EV market penetration levels. However, the existing substations are unlikely to serve future DWC needs for HDVs. Thus, consideration should be given to substation expansion to support EVs as market penetration expands. Implementing the DWC technology on interstates and jointly with major pavement preservation activities is recommended. Large scale deployment can significantly reduce the high initial investment. Renewable energy resources (solar and wind) deployed in the vicinity of ERs can reduce the electricity costs and associated greenhouse gas emissions.
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Haselbacher, Andreas, Michel Arnal, Maurizio Barbato, Alexander Fuchs, Jared Garrison, Turhan Demiray, Philipp Jenny, et al. Joint synthesis “Electricity storage via adiabatic air compression” of the NRP “Energy”. Swiss National Science Foundation (SNSF), January 2020. http://dx.doi.org/10.46446/publication_nrp70_nrp71.2020.3.en.
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La fermeture des centrales nucléaires et le développement de l’énergie solaire et éolienne rendent la production d’électricité plus volatile. De nouveaux systèmes de stockage sont nécessaires pour s’assurer que l’électricité est disponible au moment où elle est nécessaire. Le stockage adiabatique d’air comprimé représente une technologie prometteuse. Il utilise l’excédent de production des installations solaires et éoliennes pour comprimer l’air ambiant et le stocker dans une cavité souterraine. Au besoin, l’air comprimé est à nouveau détendu et entraîne alors une turbine qui produit de l’électricité. En tirant profit de la chaleur générée lors de la compression, cette technologie atteint un rendement de 65 à 75 %, ce qui est semblable à celui obtenu avec l’accumulation par pompage. En termes de potentiel d’émission de gaz à effet de serre et de dommages aux écosystèmes, la compatibilité environnementale des réservoirs d’air comprimé est également comparable à celle des systèmes à accumulation par pompage. Les réservoirs d’air comprimé sont techniquement réalisables. Les composants importants, comme les turbomachines et les accumulateurs thermiques, sont déjà disponibles sur le marché ou ont été testés dans une installation pilote. La construction de cavités bénéficie de l’expérience acquise lors de la réalisation de tunnels et de cavernes. Les réservoirs adiabatiques d’air comprimé constituent par conséquent une solution de stockage efficace, écologique et techniquement réalisable. En raison de leurs coûts d’investissement élevés et du manque de clarté qui entoure leur cadre économique et juridique, leur rentabilité demeure toutefois incertaine. Cela complique également le financement d’une installation de démonstration.
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Haselbacher, Andreas, Michel Arnal, Maurizio Barbato, Alexander Fuchs, Jared Garrison, Turhan Demiray, Philipp Jenny, et al. Synthèse conjointe «Stockage d’électricité par compression adiabatique d’air» du PNR «Energie». Swiss National Science Foundation (SNSF), January 2020. http://dx.doi.org/10.46446/publication_pnr70_pnr71.2020.3.fr.
Full textAbstract:
La fermeture des centrales nucléaires et le développement de l’énergie solaire et éolienne rendent la production d’électricité plus volatile. De nouveaux systèmes de stockage sont nécessaires pour s’assurer que l’électricité est disponible au moment où elle est nécessaire. Le stockage adiabatique d’air comprimé représente une technologie prometteuse. Il utilise l’excédent de production des installations solaires et éoliennes pour comprimer l’air ambiant et le stocker dans une cavité souterraine. Au besoin, l’air comprimé est à nouveau détendu et entraîne alors une turbine qui produit de l’électricité. En tirant profit de la chaleur générée lors de la compression, cette technologie atteint un rendement de 65 à 75 %, ce qui est semblable à celui obtenu avec l’accumulation par pompage. En termes de potentiel d’émission de gaz à effet de serre et de dommages aux écosystèmes, la compatibilité environnementale des réservoirs d’air comprimé est également comparable à celle des systèmes à accumulation par pompage. Les réservoirs d’air comprimé sont techniquement réalisables. Les composants importants, comme les turbomachines et les accumulateurs thermiques, sont déjà disponibles sur le marché ou ont été testés dans une installation pilote. La construction de cavités bénéficie de l’expérience acquise lors de la réalisation de tunnels et de cavernes. Les réservoirs adiabatiques d’air comprimé constituent par conséquent une solution de stockage efficace, écologique et techniquement réalisable. En raison de leurs coûts d’investissement élevés et du manque de clarté qui entoure leur cadre économique et juridique, leur rentabilité demeure toutefois incertaine. Cela complique également le financement d’une installation de démonstration.
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Dello, Kathie D., and Philip W. Mote. Oregon climate assessment report : December 2010. Corvallis, Oregon : Oregon Climate Change Research Institute, Oregon State University, 2010. http://dx.doi.org/10.5399/osu/1157.
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The group of scientists that make up the Intergovernmental Panel on Climate Change found in 2007 that the warming of Earth’s climate is unequivocal and largely due to human activity. Earth’s climate has changed in the past, though the recent magnitude and pace of changes are unprecedented in human existence. Recent decades have been warmer than at any time in roughly 120,000 years. Most of this warming can be attributed to anthropogenic activity, primarily burning fossil fuels (coal, oil and natural gas) for energy. Burning fossil fuels releases carbon dioxide and other heat trapping gases, also known as greenhouse gases, into the atmosphere. This warming cannot be explained by natural causes (volcanic and solar) alone. It can be said with confidence that human activities are primarily responsible for the observed 1.5 ˚F increase in 20th century temperatures in the Pacific Northwest. A warmer climate will affect this state substantially. In 2007, the Oregon State Legislature charged the Oregon Climate Change Research Institute, via HB 3543, with assessing the state of climate change science including biological, physical and social science as it relates to Oregon and the likely effects of climate change on the state. This inaugural assessment report is meant to act as a compendium of the relevant research on climate change and its impacts on the state of Oregon. This report draws on a large body of work on climate change impacts in the western US from the Climate Impacts Group at the University of Washington and the California Climate Action Team. In this report, we also identify knowledge gaps, where we acknowledge the need for more research in certain areas. We hope this report will serve as a useful resource for decision-makers, stakeholders, researchers and all Oregonians. The following chapters address key sectors that fall within the biological, physical and social sciences in the state of Oregon.