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http://dx.doi.org/10.17664/ksgee.2021.17.2.011

A Study on the Performance Evaluation of Combined Heat Pump System according to the Ratio of Ground Heat Source and Water Heat Source  

Park, Sihun (Department of Mechanical Engineering, KyungHee University)
Ko, Yujin (Department of Mechanical Engineering, KyungHee University)
Min, Joonki (Department of Mechanical Engineering, KyungHee University)
Publication Information
Journal of the Korean Society for Geothermal and Hydrothermal Energy / v.17, no.2, 2021 , pp. 11-19 More about this Journal
Abstract
In this study, combined heat source heat pump system was implemented with 4 single heat source heat pumps each applied with a geothermal source and a water source. Five cases (Case1~Case5) were configured to conduct a performance comparison and analysis of the combined heat source heat pump system. First of all, as a result of analyzing the heat source, the case when 4 ground heat sources were applied (Case1) showed a uniform EST(Entering Source Temperature) distribution throughout the year since it is less affected by outside air compared to the case when 4 water heat sources were applied (Case5). In both winter and summer, the ground heat source maintained higher EST than the water heat source. Therefore, the system with high ratio of geothermal sources is advantageous for heating, and with high ratio of water heat sources is advantageous for cooling.
Keywords
Ground heat source; Water heat source; Combined heat source; Heat pump; COP(Coefficient Of Performance);
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