Water Heater
Mostrando 13-21 de 21 artigos, teses e dissertações.
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13. Experiments on the fundamental mechanisms of boiling heat transfer
The lecture presents a survey of results found by the author and his team during recent years. An experimental technique for precise and systematic measurements of entire boiling curves under steady-state and transient conditions has been developed. Pool boiling experiments for well wettingfluids and fluids with a larger contact angle (FC-72, isopropanol, wa
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-03
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14. Analise termofluidodinamica de reatores nucleares de pesquisa refrigerados a agua em regime de convecção natural
The STHIRP-1 computer program, which fundamentals are described in this work, uses the principles of the subchannels analysis and has the capacity to simulate, under steady state and transient conditions, the thermal and hydraulic phenomena which occur inside the core of a water-refrigerated research reactor under a natural convection regime. The models and
Publicado em: 2004
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15. Influencia da pressão e temperatura no processo de sorção e perda de agua em resina acrilica polimerizada por energia de microondas
The aim of the present work was verify the influence of the pressure and temperature on the index of the sorption and desorption of acrylic resin cured by energy of microwaves at 500W for 3 minutes and compared to the method of water bathing for 73 ±J: l°e for 9 hours. Eighty samples were made in agreement with the specification n.o 12 of Dental American A
Publicado em: 2000
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16. Sintese otimizada de sistemas de aquecimento solar de agua
The optimal design of a solar water heater is regarded as achieved when the set of design variables is such that produces the minimum cost of the equipment during its life-cycle. For summing up this cost, it is necessary to take account of acquisition costs, maintenance costs and expenses with auxiliary energy. In this work, a computational procedure for fin
Publicado em: 2000
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17. STUDY OF A SOLAR WATER HEATER WITH AN HEMISPHERICAL COLLECTOR / ESTUDO DE UM AQUECEDOR SOLAR DE ÁGUA COM COLETOR HEMISFÉRICO
O presente trabalho é o estudo de um aquecedor de água para fins domésticos que utiliza energia radiante oriunda do sol, captada por um coletor de forma hemisférica. Na primeira parte do trabalho é feita uma tentativa de avaliação da radiação solar direta e difusa, a partir dos dados de incidência global em superfícies horizontais. A segunda parte
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/10/1973
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18. A THEORETICAL MODEL FOR A WATER HEATER BY SOLAR RADIATION / MODELO TEÓRICO DE UM AQUECEDOR DE ÁGUA POR RADIAÇÃO SOLAR
Tem-se descrito um modelo calculado pelo computador para prognosticar o rendimento térmico de aquecedores de água domésticos por energia solar, em base à circulação termosifónica entre o coletor e o tanque de armazenagem isolado. A intensidade da radiação solar e a temperatura do ar são determinados de modelos reais. Presupõe-se uma situação ide
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/12/1972
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19. Risk factors for contamination of domestic hot water systems by legionellae.
To assess risk factors associated with the contamination of the domestic environment by legionellae, 211 houses in the Quebec City area were randomly selected and water samples were collected from the hot water tank, the shower heads, and the most frequently used faucet. After centrifugation, concentrated samples were seeded in triplicate on BCYE and GPV med
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20. Epidemiological and Environmental Investigations of Legionella pneumophila Infection in Cattle and Case Report of Fatal Pneumonia in a Calf
A fatal pneumonia due to Legionella pneumophila was diagnosed in a young calf reared in a dairy herd located in northern Italy. Clinical symptoms consisted of watery diarrhea, hyperthermia, anorexia, and severe dyspnea. The pathological and histological findings were very similar to those observed in human legionellosis. Legionella pneumophila serogroup 1 (S
American Society for Microbiology.
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21. Large-Scale Cultivation of Acidophilic Hyperthermophiles for Recovery of Secreted Proteins
An electric water heater was modified for large-scale cultivation of aerobic acidophilic hyperthermophiles to enable recovery of secreted proteins. Critical changes included thermostat replacement, redesign of the temperature control circuit, and removal of the cathodic anticorrosion system. These alterations provided accurate temperature and pH control. The
American Society for Microbiology.