Systems Of Evaporative Cooling
Mostrando 13-24 de 24 artigos, teses e dissertações.
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13. Comportamento termico de coberturas de fibrocimento em Campinas, SP : aplicação de tecnicas passivas / Thermal behavior of fiber-cement roofing in Campinas, SP : application of passive cooling
In Brazil, the tropical climate is predominant in most of regions. Roofing is the building component with the highest exposition to direct solar radiation. The challenge for researchers and designers is to achieve cornfort in the built environrnent and to contribute to energy saving, proposing roofing systems with good thermal insulation, and consequently le
Publicado em: 2006
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14. Modeling and mapping of thermal environment to evaluate the performance of broiler chickens lodged in acclimatized housing / Modelagem e zoneamento do ambiente tÃrmico para avaliar o desempenho de frangos de corte criados em galpÃes climatizados
The objective of this work was to develop and validate a mathematical and computational model to predict thermal environment (air temperature, relative humidity, temperature-humidity index â THI and environmental index for broiler chickens productivity â EPIbc), main physiological responses (skin temperature â TS, rectal temperature â TR and respiratory
Publicado em: 2006
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15. AnÃlise do desempenho tÃrmico de fibras vegetais em sistemas de resfriamente evaporativo
O resfriamento evaporativo opera usando processos de transferÃncia de calor e massa, onde ar e Ãgua sÃo fluidos de trabalho. A passagem de um fluxo de ar pelo painel evaporativo produz queda na temperatura da corrente de ar. O objetivo deste trabalho à avaliar experimentalmente o desempenho de fibras vegetais locais como enchimento de sistemas evaporativ
Publicado em: 2006
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16. An evaporative and desiccant cooling system for air conditioning in humid climates
Evaporative cooling operates using water and air as working fluids. It consists in water evaporation, through the passage of an air flow, thus decreasing the air temperature. This system has a great potential to provide thermal comfort in places where air humidity is low, being, however, less efficient where air humidity is high. A way to solve this problem
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-09
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17. Estudo do conforto termico, desempenho animal e racionalização de energia eletrica em uma instalação suinocola na região de Boituva-SP / Study of thermal comfort, animal perfomance and energy savings in a swine barn in Boituva - SP, Brazil
A great challenge in the swine production is the definition of a construction model capable of bringing a better thermal comfort to the animals. The greatest losses on production occur due very hot days and great thermal variation, which are the chief characteristics of the tropical weather. An alternative to minimize these losses is the use of diverse clima
Publicado em: 2005
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18. Análise de técnicas para redução do consumo de energia em sistemas de refrigeração para supermercados
This work proposes a new concept for commercial refrigeration systems that attends all off-design specifications and, at same time, provides a better performance, reducing energy consumption. In order to reach that goal, this work studied two well-known technical solutions: the refrigerant liquid pumping and an evaporative cooling system installed at the air
Publicado em: 2004
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19. Analise e simulação do absorvedor evaporativo de um sistema de absorção agua - amonia para produção de gelo em escamas
This work presents a detailed numeric simulation of an horizontal tubular bubble absorber with evaporative cooling, a model that inc1udes the thermodynamic phenomena of heat and mass transfer. This heat exchanger is part of an ammonia-water absorption refrigeration system for the production of ice in scales. The transport phenomena involved were described by
Publicado em: 2002
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20. Desenvolvimento e avaliação de um sistema de resfriamento evaporativo, por aspersão intermitente, na cobertura de aviarios usando modelos de escala distorcida
Technical poultry production is presently requiring more environmental control on the thermal cornfort characteristics because of the use of high potential genetic birds, diets energy high levei, and an increase of birds density. The general objective of this research was to develop a system for roof cooling based on the evaporative cooling concept, using in
Publicado em: 1998
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21. Melhoramento de um sistema de absorção por absorção agua-amonia para a fabricação de gelo
It is focused the technological developments that must be done on absortion freezing systems using the couple water-ammonia as absorber refrigerant for ice inclustries. This study was made over this kind of plant which actually is found in the service area of Hospital das ClinicaslHC in UNICAMP. That plant was freely given to this University by MADEF S.A., p
Publicado em: 1997
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22. Susceptibility of Legionella pneumophila to three cooling tower microbicides.
Investigation of epidemic outbreaks of Legionnaires disease by Center for Disease Control personnel has resulted in the isolation of Legionella pneumophila from water in the air-conditioning cooling towers or evaporative condensers at the site of the outbreak. It is suspected that improperly maintained open, recirculating water systems may play a role in the
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23. Laboratory studies of disinfectants against Legionella pneumophila.
Legionella pneumophila suspended in tap water was exposed to biocides recommended for inhibiting biological growth in cooling towers and evaporative condensers of air-conditioning systems. Chlorine, 2,2-dibromo-3-nitrilopropionamide, and a compound containing didecyldimethylammonium chloride and isopropanol were effective in destroying concentratiois of 10(5
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24. Legionnaires disease: historical perspective.
In the summer of 1976, a mysterious epidemic of fatal respiratory disease in Philadelphia launched an intensive investigation that resulted in the definition of a new family of pathogenic bacteria, the Legionellaceae. In retrospect, members of the family had been isolated from clinical specimens as early as 1943. Unsolved epidemics of acute respiratory disea