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| Abstract |
Temperature distributions in the ground including a building are examined to survey the feasibility of heat source for passive cooling of dwellings by means of finite differential methods. The temper...ature of the underground deeper than 1 meter is below 24℃ all the year round, it can be utilized for the cooling heat source. As the daily average temperature on the ground surface in a crawl space is lower than that of the outdoor air, the air temperature in the crawl space is about 2℃ lower than the outdoor air temperature in summer. The effectiveness of a passive cooling method for dwellings is estimated with its thermal performance simulations in summer. The method uses the natural ventilation system inducing cool air of a crawl space into a living room and exhausting it to the outdoor through an attic space. In comparison with an ordinary house, this method prevents the living room air temperature rising in a wooden house about 4℃ in the daytime, and it keeps the room air temperature in a house made of concrete 1℃ below.show more
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