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Thermal Efficiency Optimization of a Ground Source Heat Pump System by Assistant Preheating/Precooling: A Case Study on a Heating-Load Dominated Building

查看全文 作　　者：LUO [1]Jin;ZHANG [1]Qi;PRIESS [2]Anna;ROHN [2]Joachim 高影响力作者 机构地区：[1]Faculty of Engineering,China University of Geosciences(Wuhan),Wuhan 430074,China;[2]GeoZentrum Nordbayern,University of Erlangen-Nürnberg,Schlossgarten 5,91054 Erlangen,Germany高影响力机构 出　　处：《Journal of Thermal Science》索引2022年第31卷第6期,共11页高影响力期刊 基　　金：the National Natural Science Foundation of China(NSFC)for providing financial support of this work(Grant No.41877200);supported by the Fundamental Research Funds for the Central Universities,China University of Geosciences(Wuhan)No.CUGL150818 and No.CUGL180407。 摘　　要：Operation strategies of Ground Source Heat Pump System(GSHPS) such as continuous or intermittent approaches have been extensively studied. In this work, a novel strategy was proposed to maximize the energy efficiency of GSHPS. In this approach, the buildings was first air-conditioned by the preheating/precooling mode and the rest thermal load was covered by the heat pump(HP) mode. The system performance can then be optimized by considering the combination of these two operating modes. A case study was made to examine the thermal performance of a GSHPS installed in Nuremberg, Germany. Thermal performance of the HP and the preheating/precooling operating modes was examined. The system was optimized by deploying the assistant preheating/precooling approach and over one-year period monitoring showed that the seasonal Coefficient of Performance(COP) of the GSHPS was 4.12 in winter and 5.01 in summer. These COP values are higher than that of the conventional GSHPS. Thus, this proposed strategy could be an efficient way to improve the thermal performance of GSHPS. 关 键 词：ground source heat pump system ground-air heat exchanger ground temperature response preheating and precooling
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