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복합용도 건물에 적용된 400RT급 수직형 지열시스템의 입주전 성능평가
황광일(Hwang Kwang-Il),신동걸(Shin Dong-Keol),김중헌(Kim Joong-Hun),신승호(Shin Seung-Ho),정명관(Jung Myoung-Kwan) 한국태양에너지학회 2008 한국태양에너지학회 논문집 Vol.28 No.3
400RT geothermal system which is the biggest capacity among on-operations at present in Korea is measured and evaluated on 23rd~26th Jan. 2008 during those days building is not allowed owners and/or tenants to move in. The geothermal system is consist with vertical-typed 112 geothermal heat exchangers which are installed circle-like 1 row with 4m interval, and has 16 units of 25USRT geothermal-source heat pump(GSHP)s. And each 5 units of circulation pump are running for geothermal heat exchangers and hot water supplies. The followings are the results. The temperatures at G.L. -70m of 2 boreholes are varied quite similarly. The average temperature difference between inlet and outlet of geothermal pipes is 4.1℃, and that of hot water supply is 3.2℃, of Zone 3's each 4 GSHPs when being operated. Despite temperature fluctuations by heating loads, the average temperature difference between main pipes of inlet and outlet of geothermal heat exchangers is measured as 4.1℃. This study propose "Geothermal System COP" which includes not only consumed electric power by compressor but also circulation pumps and auxiliary utilities. By comparing the geothermal system COP with GSHP's performance specification, it is clear that the performances of GHSPs of this site are satisfied with the specification.