Conference Paper

Proceedings of ASim Conference 2012: 1st Asia conference of IBPSA-China, Japan, Korea

Development of energy-efficient houses equipped with central duct space-conditioning system and solar collector

Myonghyang Lee, Akihito Ozaki, Mikako Maeta

Abstract: In recent years, due to the enforcement of the “Energy Conservation Standard for Housing” and the “Housing Performance Indication Law” in Japan, insulation and air-tightness have been all the more emphasized and have drastically advanced, and a duct central space conditioning system has been often introduced. This system is thought of as a useful measure to various problems in living environment, such as heat shock and sick house syndrome. However, the current central space conditioning system usually has a concern with an increase of energy consumption compared to individual space conditioning. Therefore, for the spread of this system, evaluation of the system performance is necessary. In this study, the combinational effect of the central duct space conditioning system equipped with personal circulation fans, which blow warm or dry cool air into each room from the air-conditioned space by the direct current fans, and the solar collector such as a double-skin façade and direct gain on energy saving is examined by numerical simulation utilizing the simulation software ‘THERB’. This system enables individual control of blast volume into each room and distribution of collecting solar heat to whole building. Calculation results are verified through the comparison with monitoring results of the actual house. Then it is clarified that this system is superior to the individual space conditioning system equipped with each room on energy saving and can even out the temperature and humidity in whole buildings.
Pages: 211 - 218
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