SET Proceedings 2978-4387 Caravel Press 10.65582/set.2005.116 2005.116 The Modelling of Ground-Coupled Heat Pump Systems QuYunxia ZhangLinhua DongRui ShanDong University of Architecture and Engineering, Jinan, China 23092005 4 1 978-7-112-07718-2 522 525 23 September 2005 © 2005 Copyright WSSET 2005

The research on ground-coupled heat pump systems mostly focuses on the modelling of geothermal heat exchanger and some experimental study on system performance. The transient model of geothermal heat exchangers with vertical ground-coupled buried tubes firstly is developed according to conservation of mass and energy in this paper. Then the system model is also established. It consists of two coupled models, one is antifreeze solution loop between the geothermal heat exchanger and a unit, and another is refrigerant loop in heat pump unit. The system performance, such as system cooling capacity, power input and so on, can be predicted according to this model in different layout of geothermal heat exchanger. The experimental result shows that the maximum error of performance factors between predicted and measured data does not exceed percent 10.

 ground-coupled heat pump systems geothermal heat exchanger model 23 to 25 September 2005 4th International Conference on Sustainable Energy Technologies SET2005 4 Jinan, China Kavaragh S. P. Ground source heat pump ASHRAE Journal, 40(10): 22-26, 1998. USA. Bose J E, Parker J D, McQuiston F C. Design/data manual for closed-loop ground-coupled heat pump systems, Atlanta: ASHRAE.1985. USA. Gu Y and O’Neal D L. Development of an equivalent diameter expression for vertical U-tube in ground-coupled heat pumps. ASHRAE Trans. 1998, 104(2): 347-355. Hellstrom G. Ground heat storage, Thermal analysis of duct storage systems. Department of Mathematical Physics, University of Lund, Sweden, 1991. Zeng H Y, Diao N R and Fang Z H, A finite line-source model for boreholes in geothermal heat exchangers, Heat Transfer – Asian Research, 31(7): 558-567, 2002. Heyi Zeng, Nairen Diao, Zhaohong Fang, Efficiency of vertical geothermal Heat Exchangers in the Ground Source heat pump system, The first international symposium on thermal science and engineering, beijing, 2002. CHINA. Nairen Diao, Ping Cui Zhaohong Fang, The thermal resistance in a borehole of geothermal heat exchangers, Proc. 12th International Heat Transfer Conference, 2002.