Literatura científica selecionada sobre o tema "Canon à air comprimé"
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Artigos de revistas sobre o assunto "Canon à air comprimé"
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Kern, Christian, e Edömer Tassonyi. "Pneumomédiastin: complications dues à ľusage ďun jet à air-comprimé". Canadian Journal of Anaesthesia 36, n.º 1 (janeiro de 1989): 78–80. http://dx.doi.org/10.1007/bf03010892.
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Rufer, Alfred, e Sylvain Lemofouet. "Stockage d'énergie par air comprimé. Un défi pour les circuits d'électronique de puissance". Revue internationale de génie électrique 10, n.º 5 (1 de outubro de 2007): 675–87. http://dx.doi.org/10.3166/rige.10.675-687.
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BLATTEAU, J. É., J. J. RISSO, O. CASTAGNA, B. BROUSSOLLE e B. BRISOU. "Accidents de désaturation en milieu subaquatique : premières descriptions cliniques et hypothèses physiopathogéniques". Médecine et Armées Vol. 43 No. 1, Volume 43, Numéro 1 (1 de fevereiro de 2015): 49–60. http://dx.doi.org/10.17184/eac.6858.
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Au cours du XIXe siècle, le développement du travail en air comprimé est à l’origine des premières observations cliniques attribuables aux effets de l’élévation de la pression sur l’organisme. En parallèle, la plongée en scaphandre devient une activité routinière. La conséquence est que de nombreux cas d’accidents de désaturation sont rapportés en milieu subaquatique. La première description s’intéressant à cette pathologie chez des scaphandriers, ayant fait l’objet d’une publication en 1869, est le fait de Le Roy de Méricourt, médecin de Marine, qui relate l’activité de pêcheurs d’éponges, utilisant des scaphandres de plongée. Le document de Le Roy de Méricourt constitue une référence essentielle qui a guidé le travail expérimental de grand physiologiste Paul Bert. Ces premières études sont toujours d’actualité, bien que peu à peu oubliées.
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Ma, Zhenling, Xu Zhong, Hong Xie, Yongjun Zhou, Yuan Chen e Jiali Wang. "A Combined Physical and Mathematical Calibration Method for Low-Cost Cameras in the Air and Underwater Environment". Sensors 23, n.º 4 (11 de fevereiro de 2023): 2041. http://dx.doi.org/10.3390/s23042041.
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Low-cost camera calibration is vital in air and underwater photogrammetric applications. However, various lens distortions and the underwater environment influence are difficult to be covered by a universal distortion compensation model, and the residual distortions may still remain after conventional calibration. In this paper, we propose a combined physical and mathematical camera calibration method for low-cost cameras, which can adapt to both in-air and underwater environments. The commonly used physical distortion models are integrated to describe the image distortions. The combination is a high-order polynomial, which can be considered as basis functions to successively approximate the image deformation from the point of view of mathematical approximation. The calibration process is repeated until certain criteria are met and the distortions are reduced to a minimum. At the end, several sets of distortion parameters and stable camera interior orientation (IO) parameters act as the final camera calibration results. The Canon and GoPro in-air calibration experiments show that GoPro owns distortions seven times larger than Canon. Most Canon distortions have been described with the Australis model, while most decentering distortions for GoPro still exist. Using the proposed method, all the Canon and GoPro distortions are decreased to close to 0 after four calibrations. Meanwhile, the stable camera IO parameters are obtained. The GoPro Hero 5 Black underwater calibration indicates that four sets of distortion parameters and stable camera IO parameters are obtained after four calibrations. The camera calibration results show a difference between the underwater environment and air owing to the refractive and asymmetric environment effects. In summary, the proposed method improves the accuracy compared with the conventional method, which could be a flexible way to calibrate low-cost cameras for high accurate in-air and underwater measurement and 3D modeling applications.
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Khoirot, Reni Muasisatul, Muhammad Helmi Hakim, Yuniar Alam e Ratika Sekar Ajeng Ananingtyas. "ANALISIS NILAI DRL PARAMETER ESAK/INAK PEMERIKSAAN THORAX AP/PA X-RAY CANON". Journal of Science Nusantara 3, n.º 2 (30 de junho de 2023): 61–68. http://dx.doi.org/10.28926/jsnu.v3i2.1041.
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DRL (Diagnostic Reference Level), merupakan suatu alat bantu sebagai alat optimasi untuk melindungi pasien dari radiasi guna mencegah paparan radiasi yang berlebihan pada pasien. DRL juga diterapkan pada modalitas radiografi umum pemeriksaan Thorax AP (Anterior-Posterior)/PA. Penelitian ini bertujuan untuk menentukan dan menganalisiss nilai DRL yang sesuai dengan aturan BAPETEN yang bermanfaat sebagai referensi pada pemeriksaan radiografi umum. Menggunakan data sekunder untuk mengetahui cara menentukan nilai DRL (Diagnostic Reference Level), pada parameter INAK (Incident Air Kerma) dan ESAK (Entrance Surface Air Kerma.) Menghitung nilai kuartil ketiga untuk DRL lokal dengan DRL yang sesuai dengan acuan BAPETEN. Hasil penelitian ini menunjukkan nilai DRL pada parameter INAK 0,22 mGy dan ESAK 0,32 mGy. Nilai dosis yang diterima pasien pada pemeriksaan thorax AP/PA salah satu instalasi rumah sakit di Srengat berada ditingkat aman dimana nilai dosis lebih kecil dari ambang batas yang telah ditetapkan oleh BAPETEN.
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Vázquez-Padín, J. R., M. J. Pozo, M. Jarpa, M. Figueroa, A. Franco, A. Mosquera-Corral, J. L. Campos e R. Méndez. "Treatment of anaerobic sludge digester effluents by the CANON process in an air pulsing SBR". Journal of Hazardous Materials 166, n.º 1 (julho de 2009): 336–41. http://dx.doi.org/10.1016/j.jhazmat.2008.11.055.
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Reale, Elena, Nancy B. Hopf, Florian Breider, Dominique Grandjean, Catherine Pirard, Corinne Charlier, Holger M. Koch, Aurélie Berthet, Guillaume Suarez e Myriam Borgatta. "Repeated Human Exposure to Semivolatile Organic Compounds by Inhalation: Novel Protocol for a Nonrandomized Study". JMIR Research Protocols 12 (13 de outubro de 2023): e51020. http://dx.doi.org/10.2196/51020.
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Background Semivolatile organic compounds (SVOCs) comprise several different chemical families used mainly as additives in many everyday products. SVOCs can be released into the air as aerosols and deposit on particulate matter during use by dispersion, evaporation, or abrasion. Phthalates are SVOCs of growing concern due to their endocrine-disrupting effects. Human data on the absorption, distribution, metabolism, and excretion (ADME) of these compounds upon inhalation are almost nonexistent. Objective The goal of this study is to develop a method for repeated inhalation exposures to SVOCs to characterize their ADME in humans. Methods We will use diethylhexyl phthalate (DEHP), a major indoor air pollutant, as a model SVOC in this novel protocol. The Swiss official Commission on Ethics in Human Research, Canton de Vaud, approved the study on October 14, 2020 (project-ID 2020-01095). Participants (n=10) will be repeatedly exposed (2 short daily exposures over 4 days) to isotope-labeled DEHP (DEHP-d4) to distinguish administered exposures from background exposures. DEHP-d4 aerosols will be generated with a small, portable, aerosol-generating device. Participants will inhale DEHP-d4-containing aerosols themselves with this device at home. Air concentrations of the airborne phthalates will be less than or equal to their occupational exposure limit (OEL). DEHP-d4 and its metabolites will be quantified in urine and blood before, during, and after exposure. Results Our developed device can generate DEHP-d4 aerosols with diameters of 2.5 μm or smaller and a mean DEHP-d4 mass of 1.4 (SD 0.2) μg per puff (n=6). As of May 2023, we have enrolled 5 participants. Conclusions The portable device can be used to generate phthalate aerosols for repeated exposure in human studies. International Registered Report Identifier (IRRID) DERR1-10.2196/51020
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Slyvka, Stepan. "Pedagogical aspect of meta-anthropological knowledge of canon law". Visnik Nacional’nogo universitetu «Lvivska politehnika». Seria: Uridicni nauki 10, n.º 39 (22 de agosto de 2023): 34–45. http://dx.doi.org/10.23939/law2023.39.034.
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Good and evil will never agree. A spiritual struggle is needed. The evil deeds of man testify to the absence of true, perfect knowledge. The factory of knowledge is a person who, with the help of existential and transcendental virtues and having a higher spiritual inoculation, a spiritual vaccine, knows, reveals in the universe the synergistic processual effect of ionization, that is, the transformation of potential good into ontological matters. At the same time, evil necessarily takes part in ionization, as a certain incentive to the opposite action. Ionization is caused by such an ionizer as the spiritual energy of a person, his organic cognition. This process is ontological and necessary for a person to master himself and win a place for himself in the transcendental world. The metastases of evil are so penetrating that a person cannot comprehend them from beginning to end. The natural ability of man to know the world is blocked by evil. If the earthly phenomena can be known in the main, then the supernatural ones - only a part, referring to irrationality, that is, the permissibility of existence, but the impossibility (absurdity) of revealing the essences. The philosophy of law, together with its introductions to the deontology of law and canon law, convincingly proves that it is necessary to learn about the world through the prism of law. In particular, the deontology of law appeared thanks to the ontology of law. The ontology of law derives from human organics about the laws of creation of the world. Every day of the creation of the world is justified by a specific system of laws: light, space and time, the plant world, the solar system, the nature of water-air space, the nature of terrestrial space. These are the fundamental laws of the development of the world, the laws of reality act on a person and in his body, thoughts and feelings. That is why man has a name - microcosm. Thoughts and other organic factors are the basis of the human spirit, which is the leader in relation to the body, the organism. The human spirit is influenced by various teachings, theories, and religions. This leads a person to confusion. The way out of the situation is found in canon law, which offers a single knowledge, a single theory, a single faith. Therefore, there is a need to pay attention to the knowledge of canon law.
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Vázquez-Padín, J. R., M. Figueroa, I. Fernández, A. Mosquera-Corral, J. L. Campos e R. Méndez. "Post-treatment of effluents from anaerobic digesters by the Anammox process". Water Science and Technology 60, n.º 5 (1 de maio de 2009): 1135–43. http://dx.doi.org/10.2166/wst.2009.421.
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The application of the Anammox process was studied under two different approaches for the post-treatment of anaerobic digester supernatants: two independent units, the combined SHARON-Anammox system, performed in a chemostate and a SBR, respectively, and, a single unit system composed by an air pulsing SBR to carry out the CANON process. The technology based on the combination of the SHARON-Anammox process was used to treat the effluent of an anaerobic digester from a fish canning industry. The presence of organic matter in the influent caused fluctuations in the efficiency of the SHARON unit and an optimal nitrite to ammonium ratio was not achieved in this system to feed the Anammox reactor. Nevertheless an overall percentage of nitrogen removal of 40–80% was obtained when the Anammox reactor operated at nitrite limited conditions. In those periods when the effluent from the SHARON unit contained a NO2−-N/NH4+-N molar ratio higher than 1.3 the Anammox process lost its stability due to nitrite accumulation. The effluent from an anaerobic digester placed at a WWTP was treated by a CANON system operated at room temperature (20–24°C). This system was developed from a nitrifying air pulsing reactor working at limiting dissolved oxygen conditions which was inoculated with Anammox biomass. A quick start-up of the system was observed and the reactor reached a nitrogen removal rate of 0.25 g N/(L d) 40 days after inoculation. The maximum nitrogen removal rate reached 0.5 g N/(L d). These results indicate the feasibility of the treatment of effluents from psychrophilic anaerobic digesters using the Anammox process.
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Gülci, S., T. Dindaroğlu e R. Gündoğan. "GENERATION AND ASSESSMENT OF HIGH RESOLUTION DIGITAL SURFACE MODEL BY USING UNMANNED AIR VEHICLE BASED MULTICOPTER". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-4/W6 (13 de novembro de 2017): 47–50. http://dx.doi.org/10.5194/isprs-archives-xlii-4-w6-47-2017.
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Unmanned air vehicle systems (UAVSs), which are presently defined as effective measuring instruments, can be used for measurements and evaluation studies in fields. Furthermore, UAVs are effective tools that can produce high-precision and resolution data for use in geographic information system-based work. This study examined a multicopter (hexacopter) as an air platform to seek opportunity in generating DSM with high resolution. Flights were performed in Kahramanmaras Sutcu Imam University Campus area in Turkey. Pre-assessment of field works, mission, tests and installation were prepared by using a Laptop with an adaptive ground control station. Hand remote controller unit was also linked and activated during flight to interfere with emergency situations. Canon model IXSUS 160 was preferred as sensor. As a result of this study, as mentioned previous studies, .The orthophotos can be produced by RGB (Red-green-blue) images obtained with UAV, herewith information on terrain topography, land cover and soil erosion can be evaluated.
Teses / dissertações sobre o assunto "Canon à air comprimé"
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Soufri, Ayoub. "Multi-impact behavior of composite structures : experimental and numerical approach". Electronic Thesis or Diss., Bourgogne Franche-Comté, 2023. http://www.theses.fr/2023UBFCK038.
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Les matériaux composites sont largement utilisés dans le domaine des transports en raison de leurs propriétés mécaniques spécifiques élevées. Cependant, au cours de leur cycle de vie, ils peuvent subir une dégradation significative de leurs propriétés mécaniques lorsqu'ils sont soumis à des chargements d'impacts. Les dommages induits par des impacts se manifestent sous différentes formes telles que la rupture des fibres, la fissuration matricielle, la décohésion fibres/matrice et le délaminage. L'étude du comportement aux impacts des structures composites a suscité une attention importante dans la littérature. Cependant, ces études se rapportent généralement au cas d'un seul impact ou d'impacts répétés. Peu de travaux se sont intéressés au cas d'impacts multiples, même s'ils sont plus proches des conditions réelles de service, comme dans les cas de chute de grêlons ou de projection d'objets externes tels que les gravillons présents sur les routes, les impacts d'oiseaux, etc. Dans cette thèse, nous présentons des méthodes expérimentales et numériques robustes pour le suivi in-situ et post-mortem des endommagements suite aux différents cas d'impacts possibles : mono-impact, impacts répétés, séquentiels, simultanés, etc. Ce travail a consisté dans un premier temps à développer un banc d'essai unique « canon à air comprimé ». Ensuite, un dialogue (essais expérimentaux-calculs numériques) a été assuré afin de mieux comprendre les phénomènes en jeu dans les cas de multi-impacts, pour finalement atteindre les performances maximales des matériaux compositesComposite materials are widely used in the transportation field due to their high specific mechanical properties. However, during their life cycle, they can undergo significant degradation of their mechanical properties when subjected to impact loading. Impact-induced damage occurs in various forms, such as fiber breakage, matrix cracking, fiber/matrix decohesion and delamination. The study of the impact behavior of composite structures has attracted considerable attention in the literature. However, these studies generally relate to the case of a single impact or repeated impacts. Few studies have focused on the case of multiple impacts, even though these are closer to actual service conditions, as in the case of falling hailstones or the projection of external objects such as road gravels, bird strikes, etc. In this thesis, we present robust experimental and numerical methods for in-situ and post-mortem monitoring of damage following the various possible impact cases: single-impact, repeated, sequential, simultaneous impacts, etc. The first phase of the project involved the development of a unique "compressed air cannon" test bench. Then, a dialogue (experimental tests-numerical computations) was ensured to better understand the phenomena involved in multi-impact cases, to finally reach the maximum performance of composite materials
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El, Murr Anis. "Etude du revêtement des cavités minées dans un stockage adiabatique d'air comprimé". Thesis, Paris, ENMP, 2015. http://www.theses.fr/2015ENMP0065.
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Le stockage de l’énergie constitue un enjeu majeur pour garantir la sécurité des réseaux électriques et favoriser le développement des énergies renouvelables. Véritable alternative aux stations de transfert d’énergie par pompage (STEP), le stockage d’énergie par air comprimé (CAES pour Compressed Air Energy Storage) fait partie des technologies les plus intéressantes. Dans les systèmes classiques utilisés actuellement, l’énergie de compression est perdue et l'air est préchauffé lors de la détente. Il en résulte une émission de CO2 et un rendement faible de l’ordre de 50%. Le système AA-CAES (Advanced Adiabatic Compressed Air Energy Storage) vise à pallier ces deux inconvénients en stockant la chaleur de compression dans un régénérateur thermique et en la restituant avant la détente dans la turbine. Compte tenu des fortes sollicitations thermiques, mécaniques et cycliques que subit cet ouvrage, la conception d'un revêtement capable d'assurer la stabilité, l'isolation et l'étanchéité constitue un enjeu principal du système. Ce point crucial constitue l'axe principal autour duquel s'articule cette thèse. Une campagne d'essais en laboratoire a été mise en oeuvre pour étudier les comportements thermique, hydraulique et mécanique de tous les matériaux impliqués dans un régénérateur souterrain creusé dans une roche cristalline. Pour l'air humide, dont le comportement thermodynamique est mal connu dans la gamme des fortes températures et des pressions envisagées, un nouveau modèle théorique a été développé. De la même façon, un modèle thermo-hydro-mécanique a été développé pour un milieu poreux déformable saturé traversé par un fluide compressible. L'intégration de ce modèle dans un logiciel de calcul de structures par éléments finis a permis d’examiner plusieurs configurations de revêtement et d'étudier l’effet des mécanismes de couplage sur le champ de température et sur la stabilité mécanique. Afin de valider les développements effectués et les solutions de revêtement proposées, un prototype d’un régénérateur à échelle réduite combinant pression et température a été construit dans le laboratoire LITEN du CEA à Grenoble. Les résultats des expériences et des modélisations effectuées ont mis en évidence l'importance du phénomène de convection dans les briques isolantes du revêtement et la nécessité d'assurer l'étanchéité du système avant l'isolation thermiqueEnergy storage is a major challenge to ensure the safety of electrical networks and to promote the development of renewable energies. Veritable alternative to Pumped Storage Hydropower (PSH), the energy storage using compressed air (for CAES Compressed Air Energy Storage) is one of the most interesting technologies. In conventional systems currently in use, the compression energy is lost and the air is preheated during the expansion phase. This results in emission of CO2 and a low efficiency of about 50%. The AA-CAES (Advanced Adiabatic Compressed Air Energy Storage) aims to overcome these two drawbacks by storing the heat of compression in a thermal regenerator and restoring it before expansion in the turbine. Given the high thermal, mechanical and cyclic loading subject to the regenerator, the design of a lining capable of ensuring stability, insulation and sealing is a main issue of the system. This crucial point is the main axis around which this research is articulated. A laboratory testing campaign has been conducted to study the thermal, mechanical and hydraulic behavior of all materials involved in the underground regenerator excavated in a crystalline rock. For the humid air, whose thermodynamic behavior is not well studied within the range of the high foreseen temperatures and pressures, a new theoretical model was developed. In the same way, a thermo-hydro-mechanical model was developed for a deformable porous medium saturated with a compressible fluid. The implementation of this last model into a finite element numerical code was used to examine several lining configurations and to study the effect of coupling mechanisms on the temperature field and the mechanical stability. To validate the developments made and the proposed lining solutions, a prototype of a small scale regenerator combining temperature and pressure was built in the LITEN laboratory of CEA in Grenoble. The results of the conducted experiments and modeling revealed the importance of the convection phenomenon in the insulating bricks of the lining and the need to seal the system before thermal insulation
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Terdjman, Muriel. "Etude de la contamination microbiologique de l'air comprimé à usage médical obtenu à partir d'une centrale de production". Paris 5, 1995. http://www.theses.fr/1995PA05P202.
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El, Murr Anis. "Etude du revêtement des cavités minées dans un stockage adiabatique d'air comprimé". Electronic Thesis or Diss., Paris, ENMP, 2015. http://www.theses.fr/2015ENMP0065.
Texto completo da fonteResumo:
Le stockage de l’énergie constitue un enjeu majeur pour garantir la sécurité des réseaux électriques et favoriser le développement des énergies renouvelables. Véritable alternative aux stations de transfert d’énergie par pompage (STEP), le stockage d’énergie par air comprimé (CAES pour Compressed Air Energy Storage) fait partie des technologies les plus intéressantes. Dans les systèmes classiques utilisés actuellement, l’énergie de compression est perdue et l'air est préchauffé lors de la détente. Il en résulte une émission de CO2 et un rendement faible de l’ordre de 50%. Le système AA-CAES (Advanced Adiabatic Compressed Air Energy Storage) vise à pallier ces deux inconvénients en stockant la chaleur de compression dans un régénérateur thermique et en la restituant avant la détente dans la turbine. Compte tenu des fortes sollicitations thermiques, mécaniques et cycliques que subit cet ouvrage, la conception d'un revêtement capable d'assurer la stabilité, l'isolation et l'étanchéité constitue un enjeu principal du système. Ce point crucial constitue l'axe principal autour duquel s'articule cette thèse. Une campagne d'essais en laboratoire a été mise en oeuvre pour étudier les comportements thermique, hydraulique et mécanique de tous les matériaux impliqués dans un régénérateur souterrain creusé dans une roche cristalline. Pour l'air humide, dont le comportement thermodynamique est mal connu dans la gamme des fortes températures et des pressions envisagées, un nouveau modèle théorique a été développé. De la même façon, un modèle thermo-hydro-mécanique a été développé pour un milieu poreux déformable saturé traversé par un fluide compressible. L'intégration de ce modèle dans un logiciel de calcul de structures par éléments finis a permis d’examiner plusieurs configurations de revêtement et d'étudier l’effet des mécanismes de couplage sur le champ de température et sur la stabilité mécanique. Afin de valider les développements effectués et les solutions de revêtement proposées, un prototype d’un régénérateur à échelle réduite combinant pression et température a été construit dans le laboratoire LITEN du CEA à Grenoble. Les résultats des expériences et des modélisations effectuées ont mis en évidence l'importance du phénomène de convection dans les briques isolantes du revêtement et la nécessité d'assurer l'étanchéité du système avant l'isolation thermiqueEnergy storage is a major challenge to ensure the safety of electrical networks and to promote the development of renewable energies. Veritable alternative to Pumped Storage Hydropower (PSH), the energy storage using compressed air (for CAES Compressed Air Energy Storage) is one of the most interesting technologies. In conventional systems currently in use, the compression energy is lost and the air is preheated during the expansion phase. This results in emission of CO2 and a low efficiency of about 50%. The AA-CAES (Advanced Adiabatic Compressed Air Energy Storage) aims to overcome these two drawbacks by storing the heat of compression in a thermal regenerator and restoring it before expansion in the turbine. Given the high thermal, mechanical and cyclic loading subject to the regenerator, the design of a lining capable of ensuring stability, insulation and sealing is a main issue of the system. This crucial point is the main axis around which this research is articulated. A laboratory testing campaign has been conducted to study the thermal, mechanical and hydraulic behavior of all materials involved in the underground regenerator excavated in a crystalline rock. For the humid air, whose thermodynamic behavior is not well studied within the range of the high foreseen temperatures and pressures, a new theoretical model was developed. In the same way, a thermo-hydro-mechanical model was developed for a deformable porous medium saturated with a compressible fluid. The implementation of this last model into a finite element numerical code was used to examine several lining configurations and to study the effect of coupling mechanisms on the temperature field and the mechanical stability. To validate the developments made and the proposed lining solutions, a prototype of a small scale regenerator combining temperature and pressure was built in the LITEN laboratory of CEA in Grenoble. The results of the conducted experiments and modeling revealed the importance of the convection phenomenon in the insulating bricks of the lining and the need to seal the system before thermal insulation
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Maisonnave, Océane. "Contrôle et optimisation énergétique d’une chaîne multimachines multi-pompes à vitesse variable pour le stockage d’énergie par air comprimé". Thesis, Nantes, 2019. http://www.theses.fr/2019NANT4070.
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Dans le cadre du développement d’un système de stockage par air comprimé, la présente étude porte sur le contrôle et l’optimisation énergétique d’une chaîne réversible multi-machines et multi-pompes en vue de la maximisation du rendement. Le système de pompage est identifié comme l’élément du système le plus influant vis-à-vis des performances. Une structure de contrôle-commande à vitesse variable est proposée et permet de contraindre son fonctionnement en régime dynamique à ses points de meilleure efficacité (BEP). Les lois de commandes soumettent la conversion électromécanique à un fonctionnement cyclique et transitoire. Une méthode de conception des machines électriques par minimisation des pertes de l’ensemble {convertisseur - MSAP} sur un cycle de fonctionnement est proposée. La mise en œuvre d’un simulateur appuyée d’un banc d’essai expérimental permet l’étude des performances de l’asservissement de vitesse cyclique d’un module de conversion. Enfin, l’étude de l’interconnexion électrique des modules entre eux est proposée en vue du développement de la plateforme de conversion complète. L’objectif est le lissage des fluctuations de la puissance au niveau de l’étage intermédiaire continuAs part of the development of a compressed air energy storage system, the proposed study deals with the control and the energy optimization of a reverse multielectrical machines and multi-pumps system in order to maximize the efficiency. The pumping system is identified as the most influential element towards energy performances. A variable speed control structure is proposed and allows constraining the pump working in dynamic mode closed to the best efficiency points, called Best Efficiency Points. The control laws subject the electromechanical conversion to a cyclic and transient operation. A method for sizing the electrical machines by minimizing the losses of the {converter - PMSM } system over an operating cycle is proposed. The implementation of a simulation as well as an experimental test bench allows the study of the performance of the cyclic speed control of a conversion module. Finally, the study of the electrical interconnection of the modules between them is proposed for the development of the complete conversion platform. The purpose consists in smoothing the power fluctuations on the intermediary connection with a DC bus
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Rouvreau, Laurent. "Contribution à l'étude des effets du creusement sous air comprimé en terrain meuble et aquifère". Bordeaux 1, 1989. http://www.theses.fr/1989BOR10608.
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On se propose a partir de mesures de pression interstitiellerealisees sur le chantier du cauderan-naujac d'etudier les effets du creusement d'une galerie par un tunnelier a air comprime en terrain meuble et aquifere. Apres une premiere interpretation des donnees de terrain, nous avons determine la permeabilite relative a l'air du sol grace a un dispositif simple mis au point specialement, puis nous avons etudie l'evolution du debit de gaz filtrant a travers une colonne de sol saturee soumise a un ecoulement d'air ascendant. Dans une derniere partie, un modele monodimensionnel en elements finis a ete utilise pour retrouver ces resultats experimentaux; son extension a trois dimensions ulterieure devrait permettre de mieux apprehender les phenomenes inherents a cette technique de creusement
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Mazloum, Youssef. "Modélisation dynamique et optimisation des systèmes de stockage d'énergie par air comprimé fonctionnant à pression fixe". Thesis, Paris Sciences et Lettres (ComUE), 2016. http://www.theses.fr/2016PSLEM076.
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La contribution des sources d'énergie renouvelables dans le mix de la production d'électricité augmente largement. De ce fait, l'intégration des technologies de stockage d'énergie dans le réseau électrique devient inévitable afin de remédier aux inconvénients des sources renouvelables. Ainsi, l'objectif de cette thèse est d'évaluer la rentabilité, d'optimiser et d'étudier le comportement dynamique d'un cycle adiabatique de stockage d'énergie par air comprimé fonctionnant à pression fixe (IA-CAES). Ce système est caractérisé d'une part par la récupération de la chaleur de compression et d'autre part par le stockage d'air comprimé sous pression fixe dans des réservoirs hydropneumatiques. Ceux-ci permettent d'améliorer l'efficacité et la densité énergétiques du système de stockage et d'éviter l'utilisation de sources d'énergie fossiles.Tout d'abord, un modèle statique est développé pour achever des analyses énergétiques et exergétique du système IA-CAES. Un modèle exergoéconomique est également réalisé dans le but d'optimiser la rentabilité du système de stockage en utilisant un algorithme génétique. Ainsi, une fonction objective, qui prend en compte le coût d'investissement et le coût d'exploitation, est définie pour être minimisée. L'efficacité du système est de 55,1% dans le cas de base, elle est améliorée à 56,6% après optimisation avec une diminution du capital investi de 5,6%.D'autre part, un modèle dynamique est développé pour étudier la flexibilité du système de stockage et sa capacité à répondre aux besoins du réseau électrique (réserves primaires et secondaires) en évaluant la durée des phases transitoires. Les résultats montrent que le système de stockage a besoin d’un temps supérieur à 2 min avant de pouvoir consommer tout l'excès d'énergie disponible sur le réseau électrique et supérieur à 5 min avant d'être capable de produire toute l'énergie requise par le réseau électrique. Des suggestions sont analysées dans l'objectif d'améliorer la flexibilité du système de stockage tel que le fonctionnement du système en mode de veille avec des vitesses réduites. Il permet de réduire les pertes d'énergie de 68% en mode de stockage et de 27% en mode de production par rapport au mode de veille en vitesses nominalesThe contribution of the renewable energy sources in the electricity generation mix is greatly increasing. Thereby, the integration of the energy storage technologies into the electrical grid is becoming crucial to reduce the drawbacks of the renewable energy sources. Then, the objective of this thesis is to evaluate the cost-effectiveness, to optimize and to study the transient behavior of a novel isobaric adiabatic compressed air energy storage (IA-CAES) system. This plant is characterized by the recovery of the compression heat and the storage of the compressed air under fixed pressure in hydro-pneumatic tanks. These allow improving the efficiency and the energy density of the storage system and avoiding the use of fossil fuel sources.Firstly, a steady state model is developed to perform energy and exergy analyses of the IA-CAES system. An exergoeconomic model is also carried out in order to optimize the cost-effectiveness of the storage system by using a genetic algorithm. So, an objective function, which includes the investment cost and the operating cost, is defined to be minimized. The system efficiency is 55.1% in the base case, it is improved to 56.6% after optimization with a decrease in the capital investment by 5.6%.Secondly, a dynamic model is developed to study the flexibility of the storage system and its ability to meet the electrical grid requirements (primary and secondary reserves) by evaluating the duration of the transient states. The results show that the storage system needs more than 2 min before being able to consume all the excess energy available on the electrical grid and more than 5 min before being able to produce all the energy required by the electrical grid. Suggestions are analyzed to improve the flexibility of the storage system such as the operation of the storage system in standby mode with low speeds. It allows reducing the energy losses by 68% during the storage mode and by 27% during the production mode compared to the standby mode in nominal speeds
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Atassi, Nidal. "Analyse physique du comportement instationnaire d'un jet turbulent : jet rond soumis à une brusque chute de vitesse à l'éjection". Toulouse, INPT, 1993. http://www.theses.fr/1993INPT088H.
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Notre recherche porte sur l'etude de la reaction d'un jet turbulent axisymetrique a une instationnarite externe forcee imposee par une brusque chute de vitesse a l'ejection. Une installation experimentale de jet d'air axisymetrique a vitesse d'ejection variable (re=13350, 7000) a ete realisee. Les mesures sont obtenues par anemometrie a fils chauds. Un travail important de traitement numerique des donnees en regime instationnaire et des qualifications fines de l'aerodynamique de l'installation ont ete effectuees. Une introduction a la problematique du sujet nous permet de preciser les differents types d'interaction entre l'ecoulement et l'instationnarite externe. Leurs consequences sur les caracteristiques globales et sur les structures turbulentes sont discutees. Une analyse par ordre de grandeur conduit a une classification des phenomenes d'interaction. L'instationnarite initiale balaie l'ecoulement du jet tout en etant geree par lui-meme. L'adaptation locale de l'echelle de temps de la decroissance de la vitesse a l'echelle de temps du jet est mise en evidence. La reaction des structures turbulentes est etudiee d'une facon detaillee. Ensuite, la caracterisation de l'evolution instationnaire du champ de vitesse sur l'axe du jet est presentee. La propagation de la perturbation, sa forme et son temps caracteristique sont en bon accord avec les resultats d'un modele analytique base sur les equations simplifiees de couche limite. Les evolutions temporelles affines et synchronisees de la vitesse moyenne et des composantes fluctuantes de vitesse ont ete mises en evidence. Une inversion locale du signe de gradient longitudinal de la vitesse moyenne axiale lors de la chute, cree un desequilibre de la turbulence menant a une inversion de la cascade d'energie. L'evolution instationnaire transversale montre une augmentation de diametre du jet d'environ 20 % pendant la chute de vitesse. Ceci peut-etre du a un effet de sillage et un effet de retard de l'activite des grandes structures gerant l'entrainement du jet. Enfin, un bilan de quantite de mouvement dans la zone affectee par l'instationnarite est effectue. L'evolution temporelle du bilan d'energie cinetique et des termes de production des equations des tensions de reynolds sont presentes. Ce travail centre sur l'analyse fine d'un ecoulement modele instationnaire nous permet d'une part d'acquerir une meilleure comprehension physique des interactions entre un ecoulement du jet et une forte instationnarite externe imposee et d'autre part de fournir une base detaillee de comparaison pour les simulations numeriques
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Simpore, Sidiki. "Modélisation, simulation et optimisation d'un système de stockage à air comprimé couplé à un bâtiment et à une production photovoltaïque". Thesis, La Réunion, 2018. http://www.theses.fr/2018LARE0039/document.
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En raison de la variabilité et de l'intermittence de l'énergie solaire photovoltaïque, son intégration à grande échelle dans le mix énergétique des micros réseaux intégrant différents moyens de production demeure compliquée. En plus, cette variabilité de la ressource solaire ne permet pas l’utilisation du photovoltaïque seul pour des systèmes énergétiques autonomes. Une des solutions pour surmonter ces handicaps est le stockage d'énergie qui est généralement basé sur l’utilisation de batteries lithium-ion. Cependant, leur coût élevé et leur impact négatif sur l'environnement lors de l'extraction de leurs matières premières et lors de leur destruction ou de leur recyclage en fin de vie forcent à rechercher d’autres moyens de stockage. Dans cette thèse,nous avons modélisé et simulé un système de stockage d'énergie basé sur l'air comprimé (Compressed Air Energy Storage : CAES) qui semble être une bonne alternative au système à batterie compte tenu des désavantages cités plus haut. Cette technologie à air comprimé consiste à augmenter la pression de l’air dans une enceinte par le biais d’un compresseur alimenté par une source électrique. À ce jour, les systèmes de stockage à air comprimé existant sont basés sur des configurations à grande puissance avec des réservoirs souterrains tels que d’anciennes mines de sel ou de charbon, dont le stockage se fait sur une longue durée. Dans cette étude, nous présentons la modélisation, la simulation et l’optimisation d’un système de stockage à air comprimé d'une dizaine de kilowatts destiné à alimenter un bâtiment universitaire à énergie positive de façon instantanée à l’opposé des systèmes existants. Le modèle conçu reflète le fonctionnement en régime dynamique du système global composé du bâtiment, du champ photovoltaïque, du réseau électrique et du module de stockage à air comprimé. L’optimisation effectuée permet le dimensionnement d’un système de stockage à air comprimé pour un meilleur rendement (environ 55 %). L’intégration d’un récupérateur de chaleur muni de résistance électrique et l’introduction d’un module de compression à vitesse variable permettent au bâtiment alimenté de tendre vers l’autonomie énergétique à l’image d’un système à batterie pour un site isoléDue to the variability and intermittency of renewable energy such as solar technology, its large-scale integration into the micro-grid of energy production remains complicated because the large-scale photovoltaic power plants directly connected to the electricity grid may create instabilities. In addition, this variability of the solar resource does not allow the use of photovoltaics for the stand-alone system. Dealing with these issues, one of the solutions for a deployment of renewables such as photovoltaic is the set-up of energy storage inside the grid. However, the most common technique is based on the use of lithium-ion batteries, which remains not environmentally friendly during the recycling or during the destruction after their use. So, the Compressed Air Energy Storage system (CAES) appears as a solution to this disadvantage. In fact, my thesis aims to study the feasibility of this kind of energy storage technology using a small and medium photovoltaic power plant, and its instant operation to supply electricity to the buildings and the unconnected areas. In this thesis, we present the modeling, simulation, and optimization of a ten-kilowatt compressed air storage system designed to supply instantly a building with real loads. The model performed reflects the dynamic operation of the overall system consisting of the building, the photovoltaic field, the electrical grid, and the compressed air storage module. The optimization carried out allows the sizing of a compressed air storage system with a better efficiency (about 55%). The integration of a heat recovery unit equipped with electrical resistance and the adding of a variable speed compression module allow the building to reach the energy autonomy as a battery system for a standalone site
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Burtin, Christian. "Comportement au choc de structures tubulaires en matériaux composites". Lyon, INSA, 1988. http://www.theses.fr/1988ISAL0001.
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Cette recherche traite de l'analyse du comportement dynamique de matériaux composites à fibres unidirectionnelles ou à gaines composés de résine Epoxy ou Vinylester et de fibres de carbone, de carbone/Aramide, d'Aramide et de verre. L'étude bibliographique porte sur l'étude du comportement de tubes métalliques, plastiques et polyphasiques soumis à une compression monoaxiale en régime statique ou sous sollicitation de choc à faible vitesse. Les différents procesSus d'absorption d'énergie sont analysés en fonction des modes de rupture des matériaux. Les principaux paramètres influant sur la réponse du tube sont les suivants : les conditions de chargement et d'environnement, la nature des matériaux, la géométrie des tubes et la disposition des renforts au sein de la structure. La deuxième partie présente des résultats expérimentaux obtenus à l'aide d'un dispositif d'essais de choc adapté à l'étude du comportement à l'écrasement de tubes en matériaux composites. Les vitesses de déformation générées par le canon à air comprimé varient de 10 s-1 à 40 s-1 suivant le type de tubes employés. Les processus d'absorption sont rendus possibles par l'intermédiaire d'initiateurs de rupture. La réponse les structures tubulaires composites est comparée à celle obtenue sous chargement statique en terme de force moyenne, force critique, absorption d'énergie et modes de rupture. Les observations microscopiques permettent de définir le comportement microstructural de la rupture et facilitent la compréhension des modes d' endommagement des structures composites. La dernière partie traite de la modélisation du comportement en déformation des tubes afin de déterminer le niveau de chargement conduisant à un comportement stable ou instable du tube en prenant en considération soit des critères de rupture soit des valeurs de charges critiques correspondant à une instabilité élastique.
Livros sobre o assunto "Canon à air comprimé"
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transports, Ontario Ministère des. Manuel d'utilisation des freins à air comprimé. Toronto, Ont: Ministère des transports, 1988.
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Canada, Énergie mines et ressources Canada. Réseaux de distribution d'eau et d'air comprimé. Ottawa, Ont: Énergie, mines et ressources Canada, 1985.
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The Official air brake handbook. Toronto: Ministry of Transportation, 2002.
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Grand Trunk Railway Company of Canada. Regulations for the use and care of the Westinghouse automatic air brakes. Montreal: [s.n.], 1986.
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air Comprimé Appliqué À la Traction des Tramways. Creative Media Partners, LLC, 2022.
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air Comprimé Appliqué À la Traction des Tramways. Creative Media Partners, LLC, 2022.
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Transmission and distribution of power by compressed air. [S.l: s.n., 1986.
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The Airgun Shooting Handbook. Peter Andrew Publishing Co Ltd, 1994.
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Pernolet, Arthur. L\'air comprimé et ses applications: Production, distribution et conditions d\'emploi. Adamant Media Corporation, 2004.
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Field Air Gun Shooting (Pelham Practical Sports). Pelham Books, 1988.
Encontre o texto completo da fonteCapítulos de livros sobre o assunto "Canon à air comprimé"
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Hillier, Paul. "Biographical Notes". In Arvo Pӓrt, 24–33. Oxford University PressOxford, 2007. http://dx.doi.org/10.1093/oso/9780198165507.003.0002.
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Abstract Although Part was born and grew up in Estonia, any suggestion that his music could be characterized as ‘Estonian’ would be misleading: it makes no use of Estonian themes or motifs,1 and offers no imaginative evocation of anything that might be interpreted as having a national identity; nor, apart from a couple of early cantatas, does the composer choose the Estonian language for his texts. Yet it is unlikely that the composer’s unique musical and spiritual identity could have been created anywhere else. Part has avowed that his musical education is Western, while his spiritual education is Eastern. But the particular significance of these compass points only becomes meaningful if we know the central reference point from which they emanate. In Part’s case, of course, that is Estonia, wedged between East (Russia and the Orthodox Church) and West (Germany and Scandinavia). His ‘Western’ musical training dwelt on the conventional canon of great composers, though it also owed a great deal at a local level to Russian models. However, despite its proximity to Russia, the Estonian capital, Tallinn, has the unmistakable air of being a European city, attached firmly to a cultural perspective that links cities along the Baltic coast and eventually winds round to places like Amsterdam and Copenhagen, and across land to Berlin and Prague; intellectually, this is primarily a Germanic heritage.
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Ferraro, Thomas J. "No Forgiveness in Heaven, No Forgetting in Hell". In Transgression and Redemption in American Fiction, 166–85. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198863052.003.0008.
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Chapter 7 argues that the word which brings the “nasty, grim little tale” of Willa Cather’s The Professor’s House to the surface is “sin” and that the hermeneutic that makes sense of the Professor’s love-driven crisis of will is German-American Catholic. The starting point of this revisionist reading is non-controversial; The Professor’s House frames one great homosocial, alternatively domestic, putatively anti-capitalist intergenerational romance (Tom Outland’s reminiscences of his cowpoke buddy, Roddy Blake) inside another (Professor St. Peter’s idealization and idolization of Tom Outland), both of which seem to be as pure of heart—and of fluid exchange—as the pristine air and water of Outland’s Blue Mesa. But the women of the novel, especially wife Lillian and the two daughters, would seem to have a different story to tell, regarding the Professor’s investments in Outland and Outland’s retreat with Roddy and what male-male romance has in it for women—a subtext of feminist perspective and women’s values that emerges, in remarkable clarity, as if by miracle, from the fractured yet relentless Catholic insinuations of the novel: a veritable catechism of silent revelations and muted insistences beginning, in fact, with the reclamation of the discourse and provenance of sin. It comes as a surprise, then, that a novel as sophisticated in sociological inquiry, sexual wisdom, and experimental form as The Professor’s House—one of the most academically revered, or at least attended to, novels in the current modernist canon—can and does have a moral—indeed, it tests for morality.
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Warger, W. C., M. J. Gora, C. I. Unglert, B. E. Bouma e G. J. Tearney. "Optical Coherence Tomography*Massachusetts General Hospital (MGH) has patent licensing arrangements with Terumo Corporation and NinePoint Medical. Dr. Tearney has the right to receive licensing income from these licensing agreements. Dr. Tearney receives consulting income from Samsung and NinePoint Medical. Dr. Tearney receives sponsored research from Air Liquide, Canon, iLumen, NinePoint Medical, and Samsung. Brett Bouma is an inventor of patents, owned by MIT and MGH, that are licensed to LightLab Imaging, Terumo Corporation, NinePoint Medical, and Nidek Corporation, for which he receives royalty payments. Brett also has sponsored research from Terumo Corporation and NinePoint Medical. Bill Warger is an employee at Thorlabs where he conducts prototype testing prior to the release of catalog products and software including the swept-source and spectral-domain OCT systems.☆". In Pathobiology of Human Disease, 3859–89. Elsevier, 2014. http://dx.doi.org/10.1016/b978-0-12-386456-7.07602-4.
Texto completo da fonteTrabalhos de conferências sobre o assunto "Canon à air comprimé"
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Denton, Hunter, Hao Kang, Vikram Hrishikeshavan e Moble Benedict. "Development of a Gun-Launched Rotary-Wing Micro Air Vehicle". In Vertical Flight Society 75th Annual Forum & Technology Display. The Vertical Flight Society, 2019. http://dx.doi.org/10.4050/f-0075-2019-14484.
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This paper describes the development of a compact and re-configurable rotary-wing micro air vehicle (MAV) that is capable of sustained hover and could potentially be launched from a 40 mm grenade launcher in the future. Launching the vehicle as a projectile up to the point of operation could significantly improve the mission range for these energy-constrained platforms. The MAV design used coaxial rotors with forldable blades, a thrust-vectoring mechanism for pitch and roll control, and a strict constraint on the outer diameter, which was relaxed to 52 mm for this study. Yaw control was accomplished by using a specialized counter-rotating motor that is composed of two independently controlled motors. Passive unfolding of the coaxial rotor blades utilizing centrifugal force was demonstrated. The vehicle attitude was stabilized in hover using a closed-loop proportional-derivative controller implemented on a 1.7 gram custom autopilot. Through systematic trimming and tuning of the feedback gains, the vehicle was able to achieve stable hover. When the vehicle was subjected to large impulsive itch and roll perturbations, the feedback controller was able to successfully reject the disturbance and retgurn the vehicle to a stable hover within a second. In parallel, an analogue of the flying vehicle or a "dummy" was built and launched using a pneumatic canon to understand the dynamics of the vehicle during the projectile phase without risking the actual flying vehicle. The launch demonstrated that with the right center of gravity location, the present vehicle configuration could be stable during the projectile flight even without fins.
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Kadambi, J. R., C. Shingote, R. Ke, Z. Tian, J. Furlan e R. Visintainer. "Experimental and Computational Investigation of an Air Core Inside a Milling Circuit Hydroclone". In ASME 2017 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/fedsm2017-69234.
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Hydrocyclone separators are widely used in various industrial applications in the oil and mining industries to sort, classify and separate solid particles or liquid droplets within liquid suspensions. Often, studies in the literature have investigated idealized and simplified geometries, which are also typically scaled down to very small sizes. In this study, the two phase flow system inside a transparent acyclic model with actual milling circuit cyclone hydraulics was investigated computationally and experimentally. The diameter and height of the hydrocyclone are 12.7 cm and 94 cm, respectively. In many industrial applications, a single phase flow system in a hydrocyclone is a rarity, since nearly all cyclones have an underflow which is open to atmosphere, and therefore an air core is present along the central axis. In this study, the flow field with an air core present has been investigated. The computational modelling was conducted using Star CCM+, a commercial Computational Fluid Dynamics (CFD) software package. Large Eddy Simulation (LES) and the Volume of Fluid multiphase model was used. Additionally, the computational studies also focused on the prediction of the dimensions of the air core, which were measured experimentally. The tests were conducted in the Reynolds number range of 20,000–150,000 and 9000–67,800 for the water and NaI solution respectively. The model hydrocyclone was made of optically transparent acrylic plastic with flat, smooth outer surfaces so that there were no reflections, distortions, or obstructions. Refractive index matching, to minimize refraction effects, between the test fluid and acrylic test piece was achieved using a test liquid of sodium iodide aqueous solution (63.3% NaI by weight). Images of the flow field with the air core were taken using a Canon DSLR camera. A comparison between the experimental data and the computational results were made in the r-z plane. The experimental results and the computational results will be discussed in this paper.
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Attia, Amr, e Ahmed Emara. "Influence of Gas Diluents on the Temperature of a Laminar Coflowing Jet Diffusion Flame in a Honeycomb Gaseous Burner". In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-53597.
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A series of experiments were performed on a flat honeycomb burner with air coflow to ensure laminar flow in order to study the effect of Acetylene/Argon mixture to the natural gas (NG) on the temperature distribution and flame structure. The burner assembly could be traversed in the horizontal and vertical direction controlled by using a field point system to scan the flame radially and axially. The flow rate of fuel, diluents and air was measured using differential pressure flow meters. The whole supply lines were calibrated. Methane gas, air and Acetylene/Argon mixture were injected through mixing pipes controlled with solenoid valves handled with a LabVIEW program. The combustion flame was in room atmospheric conditions with room disturbances controlled to treat such flames as free jet diffusion flames. The laminar flame axial and radial temperature profile was measured using a shielded-aspirated platinum/ Platinum-13% Rhodium thermocouple (type R). Flame images were taken using Canon EOS camera with CMOS sensor, up to 3.7 fps. The fuel used was NG with flow rate from 180 up to 520 ml/min. Ar flow rate up to 350 ml/min and C2H2 up to 100 ml/min with a constant coflow air of 3 l/min. The choice of the different Investigated cases was based on flame stability. The results obtained indicate the following: – In case of using air, NG and Ar, the fuel rich zone tends to vanish and in case of injecting Ar and acetylene mixture in addition of NG and air the front zone tends to vanish and the flame became mainly diffusion. – Maximum temperature was at the flame tip in all cases. Increasing Ar percentage up to 50% decreases tip temperature to nearly 870°C compared to the typical case (about 1000 °C); increasing acetylene content over 15% resulted in dense soot formation.
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Hassan, Sameh H., Ahmed A. Emara e Mahmoud A. Elkady. "An Investigation of the Influence of Fluidics Insertion Technique on Acetylene/Argon Gas Additives to LPG on the Turbulent Lean Premixed Flame Characteristics for an EV Burner". In ASME 2018 Power Conference collocated with the ASME 2018 12th International Conference on Energy Sustainability and the ASME 2018 Nuclear Forum. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/power2018-7129.
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A series of experiments were performed on a vertical EV burner with a constant coflow air of 873 L /min to generate turbulent lean premixed flow in order to study the impact of the addition of Acetylene/Argon mixture to the liquefied petroleum gas (LPG) on the temperature field and flame structure. The fluidics mechanism was inserted at a fixed position inside the entry section of the EV burner assembly. The flow rates of fuel (LPG/C2H2/ Ar) and air were measured using calibrated rotameters. The different volume ratios of the fuel constituents (at a specified fuel flow rate) were admitted via three solenoid valves at the entry section of each stream prior to mixing and monitored using a labview program. The axial temperature profiles at different operating conditions were measured using a bare wire Pt-Pt -10% Rh (type S) thermocouple of wire diameter 250 μm. Flame images were obtained — before and after fluidics insertion — using a high resolution Canon 6D 20MP digital camera. The selection of the different considerated cases was based on flame stability. The experimental program aims at identifying and analyzing the changes in flame characteristics (flame length, axial profiles of mean gas temperature, NOx concentration and overall combustion efficiency) resulting from the insertion of fluidics while considering different proportions of the fuel constituents) (including pure LPG, as a reference case). In all experiments flame stabilization was ensured. The results obtained indicate the following: it was noticed that in most cases of pure LPG only, and other mixtures the images shows increase in both the length and luminosity of the flame as a result of higher degrees of swirl due to the fluidics insertion while the temperature profiles of the different flames were changed. It was indicated that NOx trend was decreased by 52% while the combustion efficiency was improved by 2.5%.
Relatórios de organizações sobre o assunto "Canon à air comprimé"
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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), janeiro de 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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Anderson, Zachary W., Greg N. McDonald, Elizabeth A. Balgord e W. Adolph Yonkee. Interim Geologic Map of the Browns Hole Quadrangle, Weber and Cache Counties, Utah. Utah Geological Survey, dezembro de 2023. http://dx.doi.org/10.34191/ofr-760.
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The Browns Hole quadrangle is in Weber and Cache Counties of northern Utah and covers the eastern part of Ogden Valley, a rapidly developing area of the Wasatch Range. The Middle and South Forks of the Ogden River bisect the quadrangle and are important watersheds and recreational areas to the communities of Ogden Valley and the Wasatch Front. The towns of Huntsville and Eden are just west of the quadrangle, unincorporated communities with year-round residents are present throughout the quadrangle, and numerous summer-cabin communities are present in the eastern part of the quadrangle. A portion of Powder Mountain ski resort, which draws year-round visitation and recreation, is present in the northwest corner of the quadrangle. The quadrangle contains the Willard thrust, a major thrust fault with approximately 30 mi (50 km) of eastward displacement that was active during the Cretaceous-Eocene Sevier orogeny (Yonkee and others, 2019). In the quadrangle, the Willard thrust places Neoproterozoic through Ordovician strata in the hanging wall over a fault-bounded lozenge of Cambrian strata and footwall Jurassic and Triassic strata (see cross section on Plate 2). Neoproterozoic strata comprise a succession of mostly clastic rocks deposited during rifting of western North America and breakup of the supercontinent Rodinia (Yonkee and others, 2014). These rocks include the Cryogenian-age Perry Canyon and Maple Canyon Formations, and the Ediacaran-age Kelley Canyon Formation, Papoose Creek Formation, Caddy Canyon Quartzite, Inkom Formation, Mutual Formation, and Browns Hole Formation. The Browns Hole Formation is a sequence of interbedded volcaniclastic rock and basalt lava flows that provides the only radiometric age control in the quadrangle. Provow and others (2021) reported a ~610 Ma detrital apatite U-Pb age from volcaniclastic sandstone at the base of the formation, Crittenden and Wallace (1973) reported a 580 ± 14 Ma K-Ar hornblende age for a volcanic clast, and Verdel (2009) reported a 609 ± 25 Ma U-Pb apatite age for a basalt flow near the top of the formation. Cambrian strata in the hanging wall include a thick basal clastic sequence (Geertsen Canyon Quartzite) overlain by a thick sequence of interbedded limestone, shale, and dolomite (Langston, Ute, and Blacksmith Formations). Hanging wall rocks are deformed by Willard thrust-related structures, including the Browns Hole anticline, Maple Canyon thrust, and numerous smaller folds and minor faults. Footwall rocks of the Willard thrust include highly deformed Cambrian strata within a fault-bounded lozenge exposed in the southern part of the quadrangle, and Jurassic and Triassic rocks exposed just south of the quadrangle. The Paleocene-Eocene Wasatch Formation unconformably overlies older rocks and was deposited over considerable paleotopography developed during late stages of the Sevier orogeny. The southwest part of the quadrangle is cut by a southwest-dipping normal fault system that bounds the east side of Ogden Valley. This fault is interpreted to have experienced an early phase of slip during local late Eocene to Oligocene collapse of the Sevier belt and deposition of volcanic and volcaniclastic rocks (Norwood Tuff) exposed west of the quadrangle (Sorensen and Crittenden, 1979), and a younger phase of slip during Neogene Basin and Range extension (Zoback, 1983). Lacustrine deposits and shorelines of Pleistocene-age Lake Bonneville are present in the southwest corner of the quadrangle near the mouth of the South Fork of the Ogden River and record the highstand of Lake Bonneville (Oviatt, 2015). Pleistocene glacial deposits, present in the northwest corner of the map, are likely related to the Pinedale glaciation, commonly expressed by two moraine building episodes in the Wasatch Range (Quirk and others, 2020). Numerous incised alluvial deposits and geomorphic surfaces are present along major drainages and record pre- and post-Lake Bonneville aggradational and degradational alluvial and colluvial sequences. Mass-movement deposits, including historically active landslides, are present throughout the quadrangle. Crittenden (1972) mapped the Browns Hole quadrangle at 1:24,000 scale, which provided an excellent foundation for the general stratigraphy and structure, but the 1972 map lacked important details of unconsolidated surficial units. As part of 1:62,500 scale mapping of the Ogden 30'x60' quadrangle, Coogan and King (2016) updated stratigraphic nomenclature, revised some contacts, and added more details for surficial units. For this map, we utilized new techniques for data acquisition and analysis to delineate surficial deposits, bedrock contacts, and faults more accurately and precisely. Mapping and field data collection were largely done in 2021–2022 using a combination of GPS-enabled tablets equipped with georectified aerial imagery (U.S. Department of Agriculture [USDA] National Agriculture Imagery Program [NAIP], 2009), orthoimagery (Utah Geospatial Resource Center [UGRC] State Geographic Information Database, 2018b, 2018c; 2021a, 2021b), and lidar data (UGRC State Geographic Information Database, 2006; 2011; 2013–2014; 2018a), previously published geologic maps, topographic maps, and applications for digital attitude collection. We also used hand-held GPS units, Brunton compasses, and field notebooks to collect geologic data. Field data were transferred to a Geographic Information System (GIS), where the map was compiled and completed.