Experimental measurement and numerical simulation of horizontal-coupled slinky ground source heat exchangers |
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| Authors: | Yupeng Wu Guohui Gan Anne Verhoef Pier Luigi Vidale Raquel Garcia Gonzalez |
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| Affiliation: | 1. Department of the Built Environment, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK;2. Department of Soil Science, School of Human and Environmental Sciences, University of Reading, Reading RG6 6DW, UK;3. NCAS-Climate, Department of Meteorology, University of Reading, Reading RG6 6BB, UK;1. School of Mechanical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia;2. Department of Mechanical Engineering, Syiah Kuala University, Banda Aceh 2331, Indonesia;1. Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, PR China;2. School of Civil Engineering and Architecture, Nanchang University, Nanchang 330031, PR China;1. Faculty of Engineering and Technology, Cyprus University of Technology, Limassol, Cyprus;2. Geological Survey Department of the Ministry of Agriculture, Natural Resources and Environment, 1 Lefkonos str. Strovolos, 1415 Nicosia, Cyprus;3. School of Engineering and Design, Brunel University, Uxbridge, Middlesex UB8 3PH, UK |
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| Abstract: | Results from both experimental measurements and 3D numerical simulations of Ground Source Heat Pump systems (GSHP) at a UK climate are presented. Experimental measurements of a horizontal-coupled slinky GSHP were undertaken in Talbot Cottage at Drayton St Leonard site, Oxfordshire, UK. The measured thermophysical properties of in situ soil were used in the CFD model. The thermal performance of slinky heat exchangers for the horizontal-coupled GSHP system for different coil diameters and slinky interval distances was investigated using a validated 3D model. Results from a two month period of monitoring the performance of the GSHP system showed that the COP decreased with the running time. The average COP of the horizontal-coupled GSHP was 2.5. The numerical prediction showed that there was no significant difference in the specific heat extraction of the slinky heat exchanger at different coil diameters. However, the larger the diameter of coil, the higher the heat extraction per meter length of soil. The specific heat extraction also increased, but the heat extraction per meter length of soil decreased with the increase of coil central interval distance. |
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