周辺建物群による外気温条件,放射条件,風条件の変化が住宅における自然通風利用および冷房エネルギー消費に与える影響

概要

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In this paper, the method we proposed before was progressed to consider effects of buildings on temperature, radiation and airflow. Moreover, by applying the method, the influence of temperature, radiation and airflow varied by buildings on cross ventilation and cooling energy consumption in a residential house was estimated. The results are as follows: (1) Under the influence of buildings, temperature would rise in daytime and fall in nighttime. (2) Buildings would shield solar radiation in daytime; they would reduce nocturnal radiation in nighttime. (3) In the case of considering buildings, when windows were open, indoor thermal environment would become worse due to weakened airflow velocity, while air change rate would be enough great to discharge inner heat into outside; when windows were close, infiltration rate would become so small as to cause temperature to rise and cooling heat loads to increase. (4) Cross ventilation duration would be increased by fall in temperature in daytime and by adding shading in evening, while it would be decreased by intensification of nocturnal radiation from night to morning. On the other hand, cooling energy consumption would be decreased by reduction of infiltration above all.
2007-03-30