Climatic Range for Comfort Evaporative Cooling

Authors: Zahra Ghiabaklou

Abstract:

This paper presents the climatic range calculations for comfort evaporative cooling for Tehran. In this study the minimum climatic conditions required to achieve an appropriate comfort zone will be presented. Physiologically uncomfortable conditions in arid climates are mainly caused by the extreme heat and dryness. Direct evaporative cooling adds moisture to the air stream until the air stream is close to saturation. The dry bulb temperature is reduced, while the wet bulb temperature stays the same. Evaporative cooling is economical, effective, environmentally friendly, and healthy. Comfort cooling by direct evaporative cooling (passive or fan forced) in the 35. 41 N (such as Tehran) latitude requires design wet-bulb temperature not over 25.4 C. Evaporative cooling outside this limit cannot achieve the required 26.7 ET, and is recommended for relief cooling only.

Keywords: Evaporative cooling, Comfort temperature, Climaticdesign, Comfort cooling

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1054859

References:

[1] Watt, J.R. 1963. Evaporative Air Conditioning. The Industrial Press, New York.
[2] Giles, S. 1955. Evaporative Cooling, A Symposium, Weather Data Limitations. ASHAE Journal Section, Heating, Piping & Air Conditioning, 141-147, August.
[3] Ash, R. S. 1955. ASHAE Journal Section, Heating, Piping & Air Conditioning, 141-147, August.