| Title |
Verification Experiment of a Ground Source Multi-heat Pump at Cooling Mode |
| Authors |
최종민(Jong Min Choi) ; 강신형(Shin-Hyung Kang) ; 최재호(Jae Ho Choi) ; 임효재(Hyo-Jae Lim) ; 문제명(Jemyung Moon) ; 권영석(Youngseok Kwon) ; 권형진(HyungJin Kwon) ; 김록희(RockHee Kim) |
| Keywords |
지열원 히트펌프 ; 지중열교환기 ; 시스템 히트펌프 ; 성능계수 ; 냉방모드 GSHP ; GLHX ; Multi-heat pump ; COP ; Cooling mode |
| Abstract |
The aim of this study is to investigate the cooling performance of ground source multi-heat pump systems with a vertical single U-tube GLHX(U-tube system) and a vertical double tube GLHX(double tube system), which were installed in a school building located in Cheonan. All systems were operated in a part load conditions for all day, and the maximum COP of the single U-tube system and the double tube system were 6.2 and 5.2 at cooling mode, respectively. The double tube GLHX designed by the GLHEPRO, commercial program, was estimated to have the same performance as the U-tube GLHX, because the inlet temperatures of each outdoor unit heat exchanger for the former was similar to the latter. Howerver, it is needed to prove the long term performance. It is suggested that the new algorithms to control the flow rate of secondary fluid for GLHX according to load variation have to be developed in order to enhance the performance of the system. |