jaue2015035: Empirical research on heat pump air-conditioning using soil heat or air heat

Abstract

According to the Basic Energy Plan of the Japanese government published in 2014, soil heat is ranked as “Renewable heat energy”. Various studies as for heat energy efficiency using soil heat has been conducted in research and guidelines of the government so far. In spite of showing the advantages of using soil heat in these studies, there are no studies or experiments such as direct comparison to an air source heat pump packaged air-conditioner (Direct expansion type, Separate type) which is installed in almost houses in a temperate region. In this study, heat pump air-conditioning systems using soil heat and air heat operated under the same condition and were observed simultaneously in order to clarify the advantage of the system using soil heat through a comparison study. Heating and cooling operational data of those air-conditioners such as temperature at many measurement points, electricity consumption, and so on, were measured and recorded from November of 2013 to February of 2015. In this paper, outline of the field experiments and results were described.