Abstract
The purpose of this study is to clarify the influence of effective heat capacity on energy saving efficiency. First, the effective heat capacity of room was calculated from the data of room temperature fluctuation of a PB (plasterboard finishing) room, an mPCM (microcapsule PCM plaster wall) room, and a gelPCM (gel PCM puck installed on the back of the finishing) room. In the case of the gelPCM room, overheating due to solar radiation was suppressed to a maximum of about 3 K. The average heat transfer coefficient (UA) of the mPCM room and gelPCM room were less than that of the PB room by 10% and 5%, respectively. The heating load reduction rate of the mPCM room was about 35%. The natural temperature difference was proportional to the effective heat capacity.
