DIFFERENCE OF VENTILATION MODE ON PASSIVE COOLING EFFECT

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  • 外気導入モードの違いがパッシブクーリング効果に及ぼす影響
  • ガイキ ドウニュウ モード ノ チガイ ガ パッシブ クーリング コウカ ニ オヨボス エイキョウ

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Abstract

Ventilation is one of the most important techniques for cooling. However the cooling effect depends not only on the building design and the climate condition, but also on the mode of ventilation -when and how the ventilation is operated. In this paper, is proposed the ventilation mode: a ventilation mode where a plenty of natural ventilation operates when being outside air temperature during the period: 18℃ ≦ AT ≦ 27℃ (AT: ambient temperature) throughout the year. Next, then the passive cooling effect is discussed based on the results of a series of parametric simulation studies. The cooling effect is verified in two ways: 1) hourly indoor temperature fluctuation without air-conditioning and 2) monthly cooling load of air-conditioning throughout the year. The results are obtained as following. 1. A room temperature decline is seen by the ventilation mode, and the effect of passive cooling is understood as for a change in a room temperature in summer.2. As for cooling load as well, it had great effect on a reduction by the one with ventilation mode. 3. When heat capacity was enlarged more, great effect on passive cooling was seen in a room temperature decline and cooling load reduction, and it found out multiplier effect with ventilation mode.

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