Experimental investigation on system with combination of ground-source heat pump and solar collector |
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| Authors: | ,
Hu Tao
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Zhu Jialing
,
Zhang Wei |
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| Institution: | Key Laboratory of Efficient Utilization of Low and Medium Grade Energy of Ministry of Education,Tianjin University, Tianjin 300072, China;School of Mechanical Engineering, Tianjin University, Tianjin 300072, China |
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| Abstract: | This paper presents the heating performance and energy distribution of a system with the combination of ground-source heat pump and solar collector or a solar-assisted ground-source heat pump system (SAGSHPS) by calculation and experiment. The results show that the average absolute error is less than 0.6 °C and the relative error is less than 5% under the pulse load when the analytical solution to the 2-D solid cylindrical source model is used for the SAGSHPS. The coefficient of performance (COP) of the SAGSHPS is 2.95–4.70. The average fluid temperature in the borehole heat exchanger can increase by 3 °C with the assistance of solar collector, which will improve the COP of the heat pump by approximately 10% from the experimental data. The energy contributions to the total heating load of soil, electricity and solar are 56.30%, 36.87% and 6.83%, respectively. |
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| Keywords: | ground-source heat pump solar energy heating performance borehole heat exchanger |
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