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임효재(Hyo Jae Lim),공형진(Hyoung Jin Kong),송윤석(Yoon Seok Song),박성구(Seong Koo Park) 대한설비공학회 2006 대한설비공학회 학술발표대회논문집 Vol.2006 No.6
Groundwater heat pump systems are the oldest of the ground-souce systems and it has various type. Standing column well type are must be located in hard rock geology site and produce sufficient water for the conventional open loop system. These system are indirect type(the building circulating loop and ground water are intercept). Existence of the exchanger the foundation protect water quality to use of open loop. The design of open loop system are concern on the power requirements. An experimental study was analysis the extremely heating operation COP of ground water heat pump system. Operation efficiency of the 50RT systems shows that, COP 2.9~5.0 in heating operation. And generally it shows 3.4.
지하수 열원 복수정 지열 열펌프 시스템의 성능에 관한 실험적 연구
임효재(Hyo Jae Lim),권정태(Jeong-Tae Kwon),김창업(Chang Eob Kim),공형진(Hyoung Jin Kong),박성구(Seong Koo Park) 대한설비공학회 2009 설비공학 논문집 Vol.21 No.8
Ground water source heat pump system is the oldest one of the ground source heat pump systems. Despite of this, little formal design information has been available until recently. The important design parameters for open system are the identification of optimum ground water flow, heat exchanger selection and well pump. In this study, the capacity of 50 RT system of two well type ground water heat pump system was used. As a result, static water level was -7 m and the level during the heating operation was -32 m, cooling operation was -40 m. The initial static water level recovered within 48 hrs. The temperature of ground water is 15.6 ℃ for heating season and 16.2 ℃ for cooling season and does not depend on the outdoor temperature. Operation efficiency of the system shows that, COP 3.1 for heating and COP 4.2 for cooling.