22 May 2002
A recently completed pilot project in Jinan, China, is summarized using a ground coupled heat pump (GCHP) system for heating and air-conditioning a lecture hall and offices. In this paper the heat transfer models are discussed for the vertical ground heat exchanger, and a model of the line source with finite length is presented, which predicts the ground heat exchanger performance more adequately for longer durations. The design procedure is recommended for the vertical ground heat exchangers. An apparatus is devised for in-situ measurement of the ground thermal properties. The advantages and problems of applying GCHP in China are also explored based on the experience of this project.