垂直通気層の放湿効果におよぼす温度差の影響 : 通気層による構造体の防湿効果に関する研究 その3

Abstract

This paper reports the effects of the difference between the inside temperature of vertical air layer and the outside temperature on the efficiency of vapor discharge. Varying the width of slit or rectangular opened edges and the thickness of air layer, the following results were obtained I 1) In the case where both edges of air layer are completely open and where its thickness is kept constant, the efficiency of vapor discharge is higher when the inside temperature is higher than the outside temperature than when there is no temperature difference. 2) When the air layer is less than 3cm thick and the difference between the temperature at the wall surface and the outside temperature is within 2 or 3 degrees, the temperature difference has the strong effect on the equivalent permeation resistance. 3) The above two results show that the efficiency of vapor discharge by air layer is controlled by the difference between the moist air density in the air layer and that of outside atmosphere. 4) In the case where each edge of the air layer has a slit less than 1 cm wide and the temperature difference is more than 4 or 5 degrees, the thickness of the air layer and the width of slit have no siginificant effect on vapor discharge.