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지중 및 보조루프의 2차 유체 유량 분배비를 통한 하이브리드 지열히트펌프의 성능 최적화 연구
이주성(Jooseong Lee),박홍희(Honghee Park),김원욱(Wonuk Kim),김용찬(Yongchan Kim) 대한설비공학회 2012 설비공학 논문집 Vol.24 No.2
The objective of this study is to improve the performance of a hybrid ground source heat pump (HGSHP) by optimizing the flow distribution ratio of secondary fluid flow rate between a ground loop and a supplemental loop. Initially, a conventional ground source heat pump (GSHP) was tested to determine an optimum flow rate of the secondary fluid. Based on the selected optimum value, the HGSHP was also tested by varying the flow distribution ratio of the secondary fluid flow rate between the ground loop and the supplemental loop, such as 9:1, 7:3, 5:5, and 3:7. The results showed that the optimum flow distribution ratio of the secondary fluid flow rate was 7:3. The COP of the HGSHP was improved by 19% over the GSHP at a flow distribution ratio of 7:3 and an entering water temperature of 40℃.