Tesis sobre el tema "Thermal losse"
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Gretarsson, Andri Marcus. "Thermal noise in low loss flexures". Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2002. http://wwwlib.umi.com/cr/syr/main.
Texto completoScheck, Christopher G. "Thermal Hysteresis loss in gas springs". Ohio University / OhioLINK, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1182870415.
Texto completoBousbaine, Amar. "An investigation into the thermal modelling of induction motors". Thesis, University of Sheffield, 1993. http://etheses.whiterose.ac.uk/1824/.
Texto completoŠumić, Mersiha. "Thermal Performance of a Solarus CPC-Thermal Collector". Thesis, Högskolan Dalarna, Energi och miljöteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:du-14526.
Texto completoOberdorf, Michael Craig. "Power losses and thermal modeling of a voltage source inverter". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Mar%5FOberdorf.pdf.
Texto completoThesis Advisor(s): Alexander Julian. "March 2006." Includes bibliographical references (p. 103-104). Also available online.
Cavallucci, Lorenzo <1989>. "Thermal Stability and AC Losses in High-Field Superconducting Magnets". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amsdottorato.unibo.it/8683/1/PhD_Thesis_Cavallucci.pdf.
Texto completoKhalifa, Abdul-Jabbar N. "Heat transfer processes in buildings". Thesis, Cardiff University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254459.
Texto completoKolbe, Isobel. "pQCD energy loss and thermal field theory in small systems". Doctoral thesis, Faculty of Science, 2019. http://hdl.handle.net/11427/30385.
Texto completoZammit, Jean-Paul. "Managing engine thermal state to reduce friction losses during warm-up". Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13180/.
Texto completoAddison, James Edward. "The benefits of thermal management to reduce friction losses in engines". Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/29002/.
Texto completoOlsson, Martin. "Thermal Shape Factor : The impact of the building shape and thermal properties on the heating energy demand in Swedish climates". Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-125076.
Texto completoRajput, Mihir N. "Thermal modeling of permanent magnet synchronous motor and inverter". Thesis, Georgia Institute of Technology, 2016. http://hdl.handle.net/1853/55053.
Texto completoKuznetsova, O. O. "Reduction of thermal bridge effects caused by junctions between external walls and balcony slabs". Thesis, Київський національний університет технологій та дизайну, 2018. https://er.knutd.edu.ua/handle/123456789/9733.
Texto completoRoberts, Andrew P. "The prevention of thermal losses from automotive lubricants to improve cold start efficiency". Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/29357/.
Texto completoHäggström, Martin. "Thermal modelling of a truck gearbox". Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-63753.
Texto completoCurtis, John. "Experimental Verification for Microwave Processing of Materials in a Single Mode Rectangular Resonant Cavity". Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/34627.
Texto completoMaster of Science
Lohse, Ekkehard [Verfasser]. "Design of Regularly Structured Composite Latent Heat Storages for Thermal Management Applications / Ekkehard Lohse". München : Verlag Dr. Hut, 2013. http://d-nb.info/104598910X/34.
Texto completoZou, Jiwei. "Predicting convective heat transfer from Computational Thermal Manikin in urban outdoor environments". Thesis, University of Sydney, 2021. https://hdl.handle.net/2123/24516.
Texto completoSouza, Silas Candido Principe. "Differential effects of water loss and temperature increase in the physiology of fiddler crabs from distinct habitats". Botucatu, 2017. http://hdl.handle.net/11449/151743.
Texto completoResumo: A temperatura é uma das principais restrições ambientais à distribuição dos organismos, afetando a fisiologia e sobrevivência. Organismos que habitam a zona do entremarés estão constantemente expostos à variação da temperatura e, com as mudanças climáticas, esses organismos devem enfrentar condições diferentes, que incluem temperaturas mais elevadas, levando a maiores taxas de perda de água por evaporação e, consequentemente, redução do desempenho ou mortalidade. Neste estudo, testamos os efeitos da dessecação em duas espécies de caranguejos violinistas (Leptuca thayeri e Minuca rapax) que ocupam habitats distintos em relação à cobertura da vegetação e posição no entremarés e, portanto, podem responder de forma diferente ao estresse por dessecação e ao aumento da temperatura. Leptuca thayeri, que é restrita à zona intermediária do entremarés, é mais sensível à dessecação do que M. rapax, uma espécie generalista, com maiores taxas de dessecação e mortalidade quando expostas à dessecação por 120 minutos. Além disso, em comparação com M. rapax, L. thayeri possui uma carapaça mais permeável. Também avaliamos se o aumento de temperatura pode causar alterações fisiológicas na espécie mais restrita L. thayeri, tendo acesso a alimento e à água. Uma elevação de temperatura de 10 ° C e 20 ° C durante 72 h não causou mortalidade em L. thayeri nem mudanças na concentração de glicose e proteína na hemolinfa. No entanto, as temperaturas mais altas aumentaram os níveis de lactato desidrogen... (Resumo completo, clicar acesso eletrônico abaixo)
Mestre
Gagatsos, Christos N., Boulat A. Bash, Saikat Guha y Animesh Datta. "Bounding the quantum limits of precision for phase estimation with loss and thermal noise". AMER PHYSICAL SOC, 2017. http://hdl.handle.net/10150/626465.
Texto completoKamboj, Brij Kumar. "Modeling of once-through steam generator thermal-hydraulics during a loss of coolant accident". Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/16660.
Texto completoNyhlen, Anna. "Experimental Investigation of the Thermal Performance and Pressure Loss in Additively Manufactured mini-channels". Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-86277.
Texto completoHegde, Shashikant G. "Investigation of optical loss changes in siloxane polymer waveguides during thermal curing and aging". Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22531.
Texto completoCommittee Chair: Sitaraman, Suresh; Committee Member: Chang, Gee-Kung; Committee Member: Colton, Jonathan; Committee Member: Joshi, Yogendra; Committee Member: Swaminathan, Madhavan; Committee Member: Thompson, Patrick.
Shields, Shawn. "Dynamic thermal response of the data center to cooling loss during facility power failure". Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29725.
Texto completoCommittee Chair: Yogendra K. Joshi; Committee Member: Mostafa Ghiaasiaan; Committee Member: Sheldon Jeter. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Acharya, Ananta R. "Indium Nitride Surface Structure, Desorption Kinetics and Thermal Stability". Digital Archive @ GSU, 2013. http://digitalarchive.gsu.edu/phy_astr_diss/62.
Texto completoHurley, Joshua Daniel. "AN EXPERIMENTAL INVESTIGATION OF THERMAL BEHAVIOR OF AN AUTOMOTIVE REAR AXLE". The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1244483779.
Texto completoMarchi, Neto Ismael de. "Levantamento de coeficientes de desempenho de refrigeradores domésticos associados a armazenador térmico /". Bauru : [s.l.], 2007. http://hdl.handle.net/11449/136747.
Texto completoBanca: Celso Luiz da Silva
Banca: Marcos Pinotti Barbosa
Resumo: Devido à extrema necessidade de se diversificar as fontes de energia renováveis, torna-se necessário a busca por métodos de reciclagem de energia pela utilização de rejeitos térmicos de equipamentos. Assim, o aproveitamento desses rejeitos pode ser utilizado, como uma nova fonte de energia, para o aquecimento de água e armazenamento da mesma em reservatório para uso doméstico. Devido a isso, é proposta a construção de um aparato experimental de um reservatório de armazenamento térmico cilíndrico, onde o objetivo da pesquisa será o levantamento dos coeficientes de desempenho relativo aos refrigeradores convencional e modificado, além de realizar uma análise da armazenagem da água quente, através da técnica da estratificação térmica utilizando um refrigerador com condensador modificado. O rejeito térmico coletado, através do princípio do termosifão, será armazenado na forma de energia térmica. Os resultados mostraram que os coeficientes de desempenho dos sistemas, calculados pelas técnicas relativas às perdas térmicas teóricas e experimentais, apresentaram grande diferença. Observou-se o comportamento dinâmico das termoclinas, através do efeito da estratificação térmica e a evolução das temperaturas em função do tempo, mostrando maior viabilidade do refrigerador modificado, gerando assim maior conforto térmico aos usuários além de produzir água quente para uso doméstico.
Abstract: Due to the extreme necessity to diversify renewable energy sources, the search for energy recycling methods through the utilization of thermal losses from equipment has become fundamental. Thus, these losses can be used as new source of energy for water heating and storage in Domestic Hot Water Storage Tanks (DHWST). For this reason, the construction of an experimental apparatus with a cylindrical thermal storage tank is proposed, in which the objective of the study will be a survey of the Coefficient of Performance concerning conventional and modified refrigerators, as well as to perform an analysis of hot water, through the thermal stratification technique using a refrigerator with a modified condenser. The collected thermal loss, as per the thermosiphon principle, will be stored as thermal energy. The results showed that the coefficient of performance for the systems, calculated using techniques for theoretical and experimental thermal losses, presented great differences. The dynamic behavior of the thermal distribution was observed through the thermal stratification effect and temperature evolution in terms of time, showing greater variability of the modified refrigerator generating more thermal comfort to users in addition to providing domestic hot water.
Mestre
Wong, Kevan. "Studies of the quality of the intraosseous dental implant bed and of thermal effects in implant pathology". Thesis, University College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.481679.
Texto completoDonnier-Valentin, Guillaume. "Contributions à l'étude des transformateurs supraconducteurs et pertes AC". Grenoble INPG, 2001. https://theses.hal.science/tel-00597717.
Texto completoThe discovery of High Critical Température superconductors in 1986 restarts the interest put on superconductivjty. Thèse materials arrived at a stage where their use in electrotechnical devices is possible. Nevertheless, it is essentia! to know precisely their AC losses in order to correctly design the devices. This is why we initially studied the AC losses in a superconductor. An analytical model applicable to a cylindrical geometry (windings) was developed and compared with a numerical model. We carried out expérimental measurements in order to compare thèse various models. For the European project READY, a single-phase 41 kVA HTC superconducting transformer was ernireiy designed on the electromagnetic. Thermal and mechanical levels. This transformer, entirely cold. Will be able to operate either in liquid nitrogen until around 65 K or in gas hélium if lower températures are needed. A pulsed tube will cool it. Many experiments were made to validate our choices and also to bring essential expérimental data like the cold iron losses or the thermal résistance contact. Finallv a ver. ' preliminary stud> on various 30 MVA superconducting transformers shows the superconducting technology interest on thèse devices
Nandamuru, Venkateswara Himavanth. "Assessing the average Thermal Losses in Indian Households : A study for the city of Hyderabad, AP, India". Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-179743.
Texto completoBjervås, Jens. "Simulation of dry matter loss in biomass storage". Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-261200.
Texto completoÖberg, Andreas. "Nytt Värmesystem till en skola : Beräkning av transmissions- och ventilationsförluster". Thesis, Mittuniversitetet, Institutionen för kemiteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-39316.
Texto completoUsing ”Boverkets byggregler” and the ISO-standards that are stipulated in it are the heating requirements determined for “Kyrkbackskolan”, the only school in the municipality of Ljusnarsberg. A theoretical heating system has been designed based on the calculations. The results show that the three different buildings that make up the school have different requirements depending on their layout. Over three hundred radiators and over three hundred forty kilowatts of heating power are required to heat the school according to the calculations of transmission losses, ventilation losses and thermal bridges. The largest insecurity is in the thermal bridges since they are determined using tables. A list shows all the rooms and their heating requirements which can be used when installing or tuning the heating system.
Romero, Hamers Adolfo. "STUDY OF THE THERMAL STRATIFICATION IN PWR REACTORS AND THE PTS (PRESSURIZED THERMAL SHOCK) PHENOMENON". Doctoral thesis, Editorial Universitat Politècnica de València, 2014. http://hdl.handle.net/10251/36536.
Texto completoRomero Hamers, A. (2014). STUDY OF THE THERMAL STRATIFICATION IN PWR REACTORS AND THE PTS (PRESSURIZED THERMAL SHOCK) PHENOMENON [Tesis doctoral]. Editorial Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/36536
Alfresco
Breijder, Paul. "Analysis of Advanced Fuel Behaviour during Loss of Coolant Accident in Swedish Boiling Water Reactor". Thesis, KTH, Kärnkraftsäkerhet, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-44484.
Texto completoSharma, Bed Prasad. "Effect of sonication on thermal, mechanical, and thermomechanical properties of epoxy resin". OpenSIUC, 2009. https://opensiuc.lib.siu.edu/theses/113.
Texto completoPons, Carlota. "Durabilité des géomembranes en polyéthylène haute densité utilisées dans les installations de stockage de déchets non dangereux". Phd thesis, Université Paris-Est, 2012. http://tel.archives-ouvertes.fr/tel-00787951.
Texto completoChayopitak, Nattapon. "Performance Assessment and Design Optimization of Linear Synchronous Motors for Manufacturing Applications". Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16281.
Texto completoBrossier, Pierre. "Combined analytical and empirical modelling of power losses in rolling element bearings". Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI081.
Texto completoThe development of the transport industry has led to design lighter and more efficient transmission systems. The components within these transmissions have to withstand the transmitted loads in closer environments. As the housing has become more compact than ever, the cooling system has also become more complex. In that context, Rolling Element Bearings (REBs) are required to produce less heat, to work closer to the gear meshes while having higher life-expectancies. The calculation of REB power loss is essential to quantity the amount of injected oil to cool off these components. This study therefore aims at providing tools to model REB power loss and their thermal behaviour. As a first step, a bibliographical survey was conducted on REB power losses, including local and global models. A dedicated test rig has been used to analyse the power losses and the thermal behaviour of Deep Groove Ball Bearings. The influence of rotational speed, load, oil injection temperature, oil flow rate and lubrication design has been investigated. The above-mentioned global models have been compared to the experimental data. Finally, a REB thermal model has been developed in order to understand the influence of heat-transfer within REBs on power losses. Comparisons between different lubrication designs and between different geometries have been done. A new formulation to better take into account the REB geometry in the global models has been proposed
Ahlgren, Tobias y Jalal Eliassi. "Värmeförluster vid utvändigt placerade ventilationssystem". Thesis, Linnéuniversitetet, Institutionen för teknik, TEK, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-20676.
Texto completoEscalona, Cornejo Johan Enrique. "Modelling of Heat Losses through Coated Cylinder Walls and their Impact on Engine Performance". Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/165244.
Texto completo[CA] Actualment, els vehicles propulsats per motors de combustió interna alter- natius (MCIA) constitueixen un dels majors agents contaminants per al medi ambient. En aquest sentit, ha existit una important cooperació internacional per a promulgar lleis que regulen les emissions contaminants. De manera que els fabricants de cotxes han impulsat el desenvolupament de tecnologies més netes i amigables amb el medi ambient. Davant aquesta situació, ha sorgit recentment l'electrificació, com un dels projectes més ambiciosos de la indústria automotriu per als pròxims anys. No obstant això, aquesta meta sembla encara llunyana en l'horitzó. En tal sentit, la hibridació amb motors tèrmics i elèctrics sembla ser el camí a seguir en el curt termini. Per consegüent, els MCIA continuaran sent la principal font de propulsió terrestre durant els anys esdevenidors. Per a mitigar els inherents efectes contaminants dels motors de combustió interna, s'han proposat diferents tecnologies per a desenvolupar motors més eficients. Entre elles, l'aplicació de recobriments tèrmics en les parets de la cambra de combustió apunta a reduir les pèrdues per calor en el motor, i així augmentar la seua eficiència tèrmica. L'objectiu principal d'aquesta tesi és estudiar l'impacte d'aplicar reco- briments tèrmics en les parets de la cambra de combustió en motors de combustió interna. En aquest sentit, determinar els fluxos de calor experi- mentalment a través de les parets és complicat i no del tot fiable, pel fet que depenen del mesurament de les temperatures de paret. Per aquest motiu, el CFD-CHT (Computational fluid dynamics-Conjugate Heat Transfer) és utilitzat. El primer pas va ser validar l'eina computacional que és utilitzada per als càlculs en motors de combustió interna. Per a això es va realitzar un estudi preliminar en geometries senzilles com una canonada circular o un canal rectangular. Es van avaluar els models de transferència de calor i es va determinar la rellevància de certs paràmetres com la rugositat. Per a complementar l'estudi, es va realitzar una anàlisi de les temperatures en una geometria més realista com el pistó d'un MCIA. Els valors de temperatura calculats pel software van ser quasi iguals a les mesures experimentals. Per consegüent, la fiabilitat de l'eina computacional va ser verificada. Seguidament, es planteja una metodologia per a abordar el problema de modelar capes molt fines de recobriments tèrmics en l'espai tridimensional, per a d'aquesta manera poder simular les parets recobertes en la cambra de combustió. La metodologia consisteix a definir un material equivalent amb una grossària i nombre de nodes que permeten un mallat computacionalment realista. Per a això es va utilitzar un DoE (Design of experiments) en combinació amb una anàlisi de regressió múltiple. Els primers estudis es van dur a terme en un motor de gasolina. El mod- elatge es va dur a terme per a dues configuracions: motor amb parets metàl·liques i motor amb pistó i culata recoberts. A través d'una anàlisi exhaustiva de la transferència de la calor, es va avaluar l'impacte que tenia aplicar el revestiment tèrmic en el motor. La comparació amb dades experi- mentals demostren la utilitat del càlcul CHT per a avaluar les pèrdues de calor en un MCIA. No obstant això, cap millora va ser observada en el motor de gasolina a causa de la mena de recobriment aplicada en les parets de la cambra de combustió. Les simulacions dutes a terme en el motor de gasolina van permetre determinar que els càlculs CHT són computacionalment llargs. En aquest sentit, una sèrie d'estratègies dissenyades per a optimitzar els càlculs han sigut analitzades amb la finalitat de reduir els temps de càlcul. A través d'aquest estudi, es va trobar una metodologia per a optimitzar la malla del domini computacional. Aquesta última, empra un refinament AMR basat en la distància de paret.
[EN] Currently, vehicles powered by internal combustion engines (ICE) are targeted as contributing largely to environmental pollution. In this regard, there has been significant international cooperation to enact laws that regulate the polluting emissions. Hence, the car manufacturers have oriented efforts to the development of cleaner and more eco-friendly technologies. In order to face this situation, electrified vehicles have emerged as one of the most promising projects in the automotive industry for the coming years. However, this target still seems far on the horizon. In this sense, hybridization with thermal and electric engines seems to be the path to follow in the short term. Consequently, ICEs will continue to be one of the important sources of terrestrial propulsion in the coming years. To mitigate the inherent polluting effects of internal combustion engines, different technologies have been proposed to develop more efficient engines. Among them, the application of thermal coatings on the combustion chamber walls. This technology aims at reducing the heat losses in the engine, and thus increase its thermal efficiency. The main objective of this thesis is to study the impact of coating the combustion chamber walls of an engine on heat losses and thermal efficiency. The experimental definition of the heat fluxes through the walls is complex and not very reliable because it requires the measurement of wall temperatures. For this reason, CFD-CHT (Computational fluid dynamics-Conjugate Heat Transfer) is used. The first step was to validate the computational tool employed for CFD-CHT calculations in internal combustion engines. For this, a preliminary study in simple geometries such as a circular pipe or a rectangular channel was performed. Heat transfer models were evaluated and the relevance of certain parameters such as roughness was determined. To reinforce the study, a thermal analysis in a more realistic geometry such as the piston of a CI engine was carried out. The temperature values calculated by the software were almost the same as the experimental measurements. Consequently, the reliability of the computational tool was verified. Next, a methodology was proposed to address the problem of modeling very thin layers of thermal coating for three-dimensional CFD-CHT calculations. The methodology consists in defining an "equivalent material" with a thickness and number of nodes that allow a computationally realistic mesh. For this, a DoE in combination with a multiple regression analysis was employed. The first CFD-CHT simulations in ICEs were carried out for a gasoline engine. The study was performed for two configurations: metallic engine and engine with coated piston and cylinder head. An exhaustive heat transfer analysis was made in order to determine the impact of applying the thermal coating on the engine. Comparison with experimental data proved the suitability of the CHT calculations to evaluate heat losses in ICEs. However, no improvement on engine efficiency was observed in the gasoline engine due to the type of coating applied on the combustion chamber walls. Experience with the gasoline engine calculations showed that CHT calculations were very time consuming. In this regard, some strategies aimed at optimizing the calculations were analyzed in order to reduce calculation times. The most successful methodology was based on AMR cell refinement to optimize the mesh and reduce significantly the computational costs. This approach was used to study the impact of applying a new generation thermal coating on the piston top of a Diesel engine. The results obtained indicated that this type of coating allows for some improvement in the thermal efficiency of the engine without affecting its performance.
The author wishes to acknowledge the financial support received through contract FPI-2018-S2-1205 of the Programa para la Formación de Personal investigador (FPI) 2018 of Universitat Politècnica de València. Parts of the work presented in this thesis have received funding from the European Union’s Horizon 2020 research and innovation programme undergrant agreement No 724084.The author wishes to thank IFPEN for their permission to use their single cylinder engine geometry and experimental results, as well as Saint Gobain Research Provence for providing the coating characteristics.The respondent wants to express its gratitude to CONVERGENT SCIENCE Inc. and Convergent Science GmbH for their kind support for performingthe CFD-CHT calculations using CONVERGE software
Escalona Cornejo, JE. (2021). Modelling of Heat Losses through Coated Cylinder Walls and their Impact on Engine Performance [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/165244
TESIS
Marchi, Neto Ismael de [UNESP]. "Levantamento de coeficientes de desempenho de refrigeradores domésticos associados a armazenador térmico". Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/136747.
Texto completoDevido à extrema necessidade de se diversificar as fontes de energia renováveis, torna-se necessário a busca por métodos de reciclagem de energia pela utilização de rejeitos térmicos de equipamentos. Assim, o aproveitamento desses rejeitos pode ser utilizado, como uma nova fonte de energia, para o aquecimento de água e armazenamento da mesma em reservatório para uso doméstico. Devido a isso, é proposta a construção de um aparato experimental de um reservatório de armazenamento térmico cilíndrico, onde o objetivo da pesquisa será o levantamento dos coeficientes de desempenho relativo aos refrigeradores convencional e modificado, além de realizar uma análise da armazenagem da água quente, através da técnica da estratificação térmica utilizando um refrigerador com condensador modificado. O rejeito térmico coletado, através do princípio do termosifão, será armazenado na forma de energia térmica. Os resultados mostraram que os coeficientes de desempenho dos sistemas, calculados pelas técnicas relativas às perdas térmicas teóricas e experimentais, apresentaram grande diferença. Observou-se o comportamento dinâmico das termoclinas, através do efeito da estratificação térmica e a evolução das temperaturas em função do tempo, mostrando maior viabilidade do refrigerador modificado, gerando assim maior conforto térmico aos usuários além de produzir água quente para uso doméstico.
Due to the extreme necessity to diversify renewable energy sources, the search for energy recycling methods through the utilization of thermal losses from equipment has become fundamental. Thus, these losses can be used as new source of energy for water heating and storage in Domestic Hot Water Storage Tanks (DHWST). For this reason, the construction of an experimental apparatus with a cylindrical thermal storage tank is proposed, in which the objective of the study will be a survey of the Coefficient of Performance concerning conventional and modified refrigerators, as well as to perform an analysis of hot water, through the thermal stratification technique using a refrigerator with a modified condenser. The collected thermal loss, as per the thermosiphon principle, will be stored as thermal energy. The results showed that the coefficient of performance for the systems, calculated using techniques for theoretical and experimental thermal losses, presented great differences. The dynamic behavior of the thermal distribution was observed through the thermal stratification effect and temperature evolution in terms of time, showing greater variability of the modified refrigerator generating more thermal comfort to users in addition to providing domestic hot water.
Krishnan, Ganesh. "Thermo-mechanical reliability of ultra-thin low-loss system-on-package substrates". Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26474.
Texto completoCommittee Chair: Tummala, Rao; Committee Member: Pucha, Raghuram V.; Committee Member: Wong, C.P. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Baker, Nicholas. "Modelling and Analysis of Daylight, Solar Heat Gains and Thermal Losses to Inform the Early Stage of the Architectural Process". Thesis, KTH, Installations- och energisystem, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-222470.
Texto completoHartnick, Angelo. "Effects of thermal stresses on Pressurised Water Reactor nuclear containment vessels following a Loss of Coolant Accident with assimilated containment filtered venting system". Master's thesis, Faculty of Engineering and the Built Environment, 2021. http://hdl.handle.net/11427/32718.
Texto completoYao, Yiying. "Thermal Stability of Al₂O₃/Silicone Composites as High-Temperature Encapsulants". Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/50593.
Texto completoPh. D.
Kleo, Mario, Holger Mößinger, Florentine Förster-Zügel, Helmut F. Schlaak y Thomas Wallmersperger. "Investigation of the thermal effects in dynamically driven dielectric elastomer actuators". SPIE, 2018. https://tud.qucosa.de/id/qucosa%3A35159.
Texto completoCoillet, Élodie. "Structural characterization of thin non-crystalline layers for low thermal noise optic". Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1132/document.
Texto completoPredicted in 1916 by Einstein, then detected one hundred year later by the VIRGO and LIGO collaborations, the gravitational waves are a promising tool to observe the universe at scales always bigger. However, to detect a larger number of events, one of the main limitation of the detectors originates in the mirrors coatings thermal noise, thin non-crystalline layers composed of SiO2 and TiO2-doped Ta2O5. The aim of this work is to study the micro-structural origin of the layers thermal noise, by using vibrational spectroscopies, in order to, ultimately, process more efficient materials. Studies show a decrease of the thermal noise when the mirrors are annealed at low temperature. In silica, a structural reorganization happens during the annealing, following the evolution of the thermal noise. Notably, a stress relaxation has been observed. However, in Ta2O5, oxide with a complex structure not much studied, the impact of the annealing seems to be more limited, while the structure crystallizes easily as soon as the temperature increases. To complete our knowledge of this structure, in-situ high pressure measurements were conducted. Finally, the TiO2-doping effect of the Ta2O5 structures was studied
Haro, Daniel. "Cold acclimation response of non-native Italian wall lizard (Podarcis siculus) populations from New York and California". DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1952.
Texto completoZavadzkis, Lukas. "Skirstomųjų tinklų galios nuostolių skaičiavimo metodų palyginimas". Master's thesis, Lithuanian Academic Libraries Network (LABT), 2005. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20050614_162126-59320.
Texto completoXu, Shuangyan. "Evaluating Thermal and Mechanical Properties of Electrically Conductive Adhesives for Electronic Applications". Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/27112.
Texto completoPh. D.