Abstract
The energy efficiencies of two kinds of ground-source heat pump systems (GSHPs) are evaluated in this study based on field data. The two kinds of GSHPs are a ground-coupled heat pump system (GCHPs) and a groundwater heat pump system (GWHPs) which were installed in two apartment buildings of wuhan, respectively. We monitored various operating parameters, including the outdoor temperature, the flow rate, the electrical consumption and the water temperature. The values of coefficient of performance (COP) of system and chiller were evaluated based on a series of measurements. The seasonal COP of the chillers of the GCHPs and the GSHPs were 4.45 and 3.94 in the cooling season, 5.07 and 3.69 in the heating season. The comparison of COP implies that the GWHPs is more efficient than the GCHPs due to its steady water temperature of ground source heat exchanger.
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