| Title |
An Experimental Study on the Cooling and Heating Performance of a Residential Ground Source Heat Pump System |
| Authors |
공형진(Hyoung Jin Kong) ; 강성재(Sung Jae Kang) ; 윤경식(Kyoung Sik Yun) ; 임효재(Hyo Jae Lim) |
| DOI |
http://dx.doi.org/10.6110/KJACR.2013.25.3.156 |
| Keywords |
지열원 열펌프 ; 성능계수 ; 계절성능계수 ; 지중 방열량 ; 지중 취득열량 Ground source heat pump ; Coefficient of performance ; Seasonal performance factor ; Heat rejection rate ; Heat extraction rate |
| Abstract |
Ground Source Heat Pump (GSHP) systems utilize geothermal energy as a thermal source or sink, for heating, cooling and domestic hot water. It is well known that GSHP is environmentally friendly, and saves energy dramatically. For this reason, many investigative researches have been conducted on commercial and governmental buildings. However, studies on residential GSHP are few, because of the small capacity and cost. In this study, we experimented with the characteristic performance of heating, cooling and seasonal performance factor for a residential GSHP system, which consisted of two 180 m deep u-tube ground heat exchangers, a heat pump and measurement instruments. The installed capacity of the heat pump was 5RT, and the conditioning area was 62.23 m2. From the experimental results, the cooling COP of the heat pump was 4.13, and the system COP was 3.51, while the CSPF was 3.32. On the other hand, the heating COP of the heat pump was 3.87, and the system COP was 3.39, while the HSPF was 3.39. Also, in-situ cooling COP and capacity were 93.7% and 96.4% compared with the EWT certification data, respectively, and that of heating were 98.3% and 95.7%, respectively. |