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Daily Heating Performance of a Ground Source Multi-heat Pump at Heating Mode  

Choi, Jong-Min (Department of Mechanical Engineering, Hanbat National University)
Lim, Hyo-Jae (Department of Mechanical Engineering, Hoseo University)
Kang, Shin-Hyung (Department of Mechanical Engineering, Konyang University)
Moon, Je-Myung (Air-conditioning R&D Group, Samsung Electronics Co. Ltd.)
Kim, Rock-Hee (Air-conditioning R&D Group, Samsung Electronics Co. Ltd.)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.21, no.9, 2009 , pp. 527-535 More about this Journal
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.
Keywords
GSHP; GLHX; Multi-heat Pump; COP; Heating mode;
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Times Cited By KSCI : 2  (Citation Analysis)
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