Passive cooling of buildings by natural energies
Cooling of buildings by natural energies can be effected either by solar energy, although only with ‘active’ sophisticated systems, or by the utilization of other natural energies which can also be applied in a passive way. The natural energies which can be utilized for passive cooling are: �...
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| Published in: | Energy and buildings 1979-01, Vol.2 (4), p.279-285 |
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| Main Author: | |
| Format: | Article |
| Language: | eng |
| Online Access: | Get full text |
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| Summary: | Cooling of buildings by natural energies can be effected either by solar energy, although only with ‘active’ sophisticated systems, or by the utilization of other natural energies which can also be applied in a passive way.
The natural energies which can be utilized for passive cooling are:
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- nocturnal longwave outgoing radiation
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- night convection
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- water evaporation
Combinations of these cooling sources are also possible, such as combining convective and evaporative nocturnal cooling or combining nocturnal longwave radiant initial cooling of air with subsequent super-cooling or water evaporation.
The applicability of the various natural cooling sources (besides solar energy) depends greatly upon the climatic conditions prevailing in summer
at night in a given region, and in particular on the dry and wet bulb temperatures of the nights in summer. This is because the low level to which a thermal storage system can be cooled is close to the dry or wet bulb temperatures at night, for convective or evaporative cooling, respectively.
This paper discusses the applicability of various cooling systems utilizing the above-mentioned natural energies and some of the problems involved. Quantitative comments are related to the climatic conditions prevailing in Israel. |
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| ISSN: | 0378-7788 |