| Title |
Heating Performance of a Ground Source Multi-Heat Pump for a Greenhouse |
| Authors |
강신형(Shin-Hyung Kang) ; 최종민(Jong Min Choi) ; 문제명(Jemyung Moon) ; 권형진(Hyungjin Kwon) |
| Keywords |
지열원 열펌프 ; 지중열교환기 ; 비닐하우스 ; 시스템 열펌프 ; 성능계수 GSHP ; GLHX ; Greenhouse ; Multi-heat pump ; COP |
| Abstract |
Good plant-growth conditions can be achieved by means of using greenhouses. One of the main issues in greenhouse cultivation is energy savings through the development of high efficient heating and cooling system. GSHPs are one of the recommended systems to cope with this pending need. The aim of this study is to investigate the heating performance of ground source multi-heat pump system installed in a greenhouse under part load conditions. Daily average heating COP of the heat pump unit was very high by at least 7.4, because of relatively large condenser, evaporator, and mass flow rate through ground loop heat exchanger. However, the system COP, overall heating coefficient of the performance of the system with heat pump unit and GLHX, decreased drastically due to relatively large power consumption of circulating pump under part load condition. It is suggested that the technology to enhance the performance of the ground source multi-heat pump system for a greenhouse under part load conditions should be developed. |