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Passive Cooling of Air at Night by the Nocturnal Radiation in Loei, Thailand

2008; Institute of Electrical and Electronics Engineers; Volume: 3; Issue: 1 Linguagem: Inglês

1905-7172

Treeamorn Prommajak, Jindaporn Phonruksa, Surajitr Pramuang,

Thermal Radiation and Cooling Technologies

This preliminary study aims to investigate experimentally the natural nocturnal cooling of air in a house model under the weather conditions of Loei Province, Thailand during two months of early rainy season. A house model volume about 10.0 m 3 was constructed to measure the heat removal. The air was used as the working fluid for the heat convection from the sky radiator areas of 0.88, 1.78 and 2.66 m 2 to the conditioned space. It was found that the temperature gap between the radiative plate of the sky radiator and ambient temperature in the clear sky condition was bigger than that in the cloudy sky condition. The radiative plate temperature was about 5 o C below ambient temperature making the inlet air temperature into the house model by 2-3 o C below ambient temperature that can be used air as the working fluid for the nocturnal cooling in Loei Province.