Transient heat transfer in a U-tube borehole heat exchanger |
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| Affiliation: | 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. School of Energy Science and Engineering, Central South University, Changsha 410083, China;2. Department of Architecture and Civil Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region;1. School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, PR China;2. School of Civil Engineering, Dalian University of Technology, Dalian 116024, PR China;1. Energetic and Applied Thermal Laboratory(ETAP) Faculty of Technology, Abou Bakr Belkaid University, BP 230, 13000 Tlemcen, Algeria;2. Department of Mechanical Engineering, Technology Faculty, Firat University, 23119 Elazig, Turkey |
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| Abstract: | A transient heat transfer model has been development for a thermal response test (TRT) on a vertical borehole with a U-tube. Vertical borehole heat exchangers are frequently coupled to ground source heat pumps, which heat and cool buildings. The model provides an analytical solution for the vertical temperature profiles of the circulating fluid through the U-tube, and the temperature distribution in the ground. The model is verified with data sets from a laboratory sandbox and field TRTs, as well as a previously reported numerical solution. Unlike previous analytical models, the vertical profiles for the circulating fluid are generated by the model without any assumption of their functional form. |
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| Keywords: | Ground-source heat pump Ground heat exchanger Thermal response test Borehole thermal resistance Borehole temperature profiles Borehole heat transfer |
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