A pilot project of the hybrid ground-coupled heat pump (HGCHP) system with hot water supply reported in this paper was developed in October, 2006 in Hong Kong for research purposes. The HGCHP system can offer space cooling and/or space heating accompanied with hot water supply for residential or public buildings. A data collection system was established to record most of the operating variables. The operating performance has been discussed and evaluated based on the recorded data. Furthermore, the impact of the heat transfer within the ground heat exchanger on the surrounding soil has been discussed according to the recorded temperatures within the boreholes. The results demonstrate that this system has higher energy efficiency for providing space cooling and hot water. The experiments also indicate that the alternative cooling/heating modes and discontinuous operation are favorable for the heat transfer process in the ground heat exchangers. Therefore, the HGCHP system with DHW supply is a preferable alternative for hot-climate areas like Hong Kong when space cooling and DHW are needed at the same time.
Keywords. Hybrid ground-coupled heat pump; domestic hot water; heat transfer
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How to cite this article
Cui, P., Yang, H. and Fang, Z. (2007). 'Investigation on the Operating Performance of Hybrid Ground Coupled Heat Pump Systems: a Case Study in Hong Kong'. SET Proceedings, 6(1), pp. 146-152. https://doi.org/10.65582/set.2007.024
