Field study on the effect of passive cooling system in RC building

摘要

In recent year, Environmental problems become serious, and various passive methods have come to be adopted in the architecture design. The rooftop lawn is seen to have many merits such as; reduction in the air conditioning load of building and contribution to the mitigation of the heat island phenomenon. The roof spraying system is seen to an effective method to the roof of low heat insulation performance, which can reduce the heat load in the summer season. However, at present most of the buildings with a RC construction and have the insulating material in roof for considering the thermal insulation in the winter season. There has been a trend to adopt the roof spraying system actively in even such a general RC building, but it is hardly clarified how much actual effect it has. In this study, the authors conducted a measurement in a RC building with a rooftop spraying system and roof lawn in order to clarify the effects and problems on thermal environment.