| Title |
Cooling and Heating Performance Evaluation of a GSHP System |
| Keywords |
Ground-source heat pump ; GSHP, 지열원 열펌프 ; Performance evaluation ; 성능 평가 ; Ground heat exchanger ; 지중 열교환기 ; Coefficient of performance ; COP, 성능계수 |
| 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 m2 floor area in the Korea Institute of Construction Technology(37o39'N, 126o48'E) 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. |