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| Thermal destratification in buildings ： ウィキペディア英語版 |
Thermal destratification
Thermal destratification is the process of mixing the internal air in a building to eliminate stratified layers and achieve temperature equalisation throughout the building envelope. It is the reverse of the natural process of thermal stratification, which is the layering of differing (normally rising) air temperatures from floor to ceiling.
== Temperature differentials ==
In a stratified building, temperature differentials of up to 10°C can be found over a height of 10 metres on average. In extreme cases, temperature differentials of 10°C have been found over a height of 1 meter. In a destratified building, temperature differentials can be reduced to 1 - 2°C or less from floor to ceiling.
An experiment with a 3-meter high room yielded a temperature difference of 0.86°C following installation of destratification fans. Computational fluid dynamics may be used to calculate the distribution. In the United States, ASHRAE Standard 55 prescribes 3°C as the limit for the vertical air temperature difference between head and ankle levels.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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