| Title |
Daily Heating Performance of a Ground Source Multi-heat Pump at Heating Mode |
| Authors |
최종민(Jong Min Choi) ; 임효재(Hyo-Jae Lim) ; 강신형(Shin-Hyung Kang) ; 문제명(Jemyung Moon) ; 김록희(RockHee Kim) |
| Keywords |
지열원 히트펌프 ; 지중열교환기 ; 시스템 히트펌프 ; 성능계수 ; 난방모드 GSHP ; GLHX ; Multi-heat pump ; COP ; Heating mode |
| Abstract |
The aim of this study is to investigate the daily heating performance of ground source multi-heat pump system with vertical single U-tube type GLHXs, which were installed in a school building located in Cheonan. Daily average COP of heat pump unit on Jan. 12th, 2009 at heating mode was lower than it on Nov. 10th, 2008 and Dec. 15th, 2008, because of lower EWT of the outdoor heat exchanger and relatively smaller size of condenser and evaporator. But, the system COP on the former was higher than it on the latter because ground loop circulating pump was operated in rated speed. It is suggested that the new algorithms to control the flow rate of secondary fluid for GLHX according to load change have to be developed in order to enhance the performance of the system COP. |