PERFORMANCE EVALUATION OF GEOTHERMAL HEAT PUMP WITH DIRECT EXANSION TYPE VERTICAL GROUND HEAT EXCHANGER
Vertical closed-loop ground source heat pump systems (GSHP) have been installed widely in Korea since it can extract moderate temperature level of geothermal heat in a small area.As a ground heat exchanger,a vertical closed-loop type with brine circulation is mostly preferred since it is simple and less harmful to ground environment.However,it requires a secondary heat exchange loop between the refrigerant in a heat pump and the brine.By adding a geothermal heat exchanger in the secondary heat exchange loop,circulation pumps should be attached and the temperature difference between refrigerant and ground is increased,which are important parts of performance degradation.In this paper,performances of direct expansion (DX) geothermal heat pump were evaluated mathematically as an alternative of classical indirect geothermal heat pump.
Direct exchange Ground source heat pump Ground loop heat changer
KIM Minsung BAIK Young-Jin RA Ho-Sang
High Efficiency and Clean Energy Research Division,Korea Institute of Energy Research 71-2 Jang-dong,Yuseong-gu,Daejeon 305-343,Korea
国际会议
西安
英文
1-7
2012-08-26（万方平台首次上网日期，不代表论文的发表时间）