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Cooling and Heating Performance Evaluation of a GSHP System  

Sohn Byong Hu (Fire & Engineering Services Research Department, KICT)
Cho Chung-Sik (Fire & Engineering Services Research Department, KICT)
Shin Hyun-Jun (Fire & Engineering Services Research Department, KICT)
An Hyung-Jun (Kolong Engineering & Construction Co., LTD.)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.17, no.1, 2005 , pp. 71-81 More about this Journal
Abstract
The main objective of the present study is to investigate the performance characteristics of a ground-source heat pump(GSHP) system with a 130 m vertical and 62 mm nominal diameter U-tube ground heat exchanger. In order to evaluate the performance analysis, the ground-source heat pump connected to a test room with $90\;m^2$ floor area in the Korea Institute of Construction $Technology(37^{\circ}39 was designed and constructed. This ground-source heat pump system mainly consisted of ground heat exchanger, indoor heat pumps and measuring devices. The cooling and heating loads of the test room were 5.5 and 7.2 kW at design conditions, respectively. The experimental results were obtained from July 2, 2003 to July 1, 2004. The cooling and heating performance coefficients of the system were determined from the measured data. The average cooling and heating COPs for the system were obtained to be 4.90 and 3.96, respectively. The temperature variations in ground and the ground heat exchanger pipe surface at different depths were also measured.
Keywords
Ground-source heat pump(GSHP); Performance evaluation; Ground heat exchanger; Coefficient of performance(COP);
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