Cooling characteristics of ground source heat pump with heat exchange methods |
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| Affiliation: | 1. Thermal&Fluid System R&BD Group, Korea Institute of Technology, Ipjang-Myun, Cheonan-Si, Chungnam, 331-825, Republic of Korea;2. School of Mechanical Engineering, Hoseo University, Baebang-Myun, Asan-Si, Chungnam, 336-795, Republic of Korea;1. Department of Building Physics and Building Ecology, Vienna University of Technology, Karlsplatz 13, 1040 Vienna, Austria;2. Swiss Federal Institute of Technology, Wolfgang-Pauli-Strasse 15, 8093 Zuerich, Switzerland;3. Laboratory for Building Science and Technology, Empa, Überlandstrasse 129, 8600 Dübendorf, Switzerland;4. Department of Architecture, Department of Architecture, Epoka University, Tirana, Albania;1. College of Economics and Management, Nanjing University of Aeronautics and Astronautics, 29 Jiangjun Avenue, Nanjing, China;2. College of Science, Nantong University, 9 Seyuan road, Nantong, China;1. Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, 400 W 13th Street, Rolla, MO 65409-0050, USA;2. Missouri University of Science and Technology, Engineering Management and Systems Engineering, 600 W 14th Street, Rolla, MO 65409-0370, USA;3. Northern Illinois University, Department of Technology and Institute for the Study of the Environment, Sustainability, and Energy, 101 Still Hall, DeKalb, IL 60115, USA |
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| Abstract: | The objective of this study is to investigate the influence of the cooling performance for a water-to-water ground source heat pump (GSHP) by using the counter flow and parallel flow methods. The GSHP uses R-410A as a refrigerant, and its main components are a scroll compressor, plate heat exchangers as a condenser, an evaporator, a thermostatic expansion valve, a receiver, and an inverter. Based on our modeling results, the heat transfer rate of the counter flow evaporator is higher than that of the parallel flow evaporator for a heat exchanger length greater than 0.42 m. The evaporator length of the GSHP used in this study was set to over 0.5 m. The performance of the water-to-water GSHP was measured by varying the compressor speed and source-side entering water temperature (EWT). The cooling capacity of the GSHP increased with increased compressor RPMs and source side EWT. Also, using the counter flow method, compared to the parallel flow method, improves the COP by approximately 5.9% for an ISO 13256-2 rated condition. |
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| Keywords: | COP Counter flow Entering water temperature Ground source heat pump Parallel flow |
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