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현장타설형 건물 기초를 이용한 지중열 공조시스템의 성능평가에 관한 연구
황석호(SuckHo Hwang),남유진(Yujin Nam) 대한설비공학회 2010 설비공학 논문집 Vol.22 No.9
Ground-source(Geothermal) heat pump(GSHP) systems can achieve a higher coefficient of performance than conventional air-source heat pump(ASHP) systems. However, GSHP systems are not widespread because of their expensive installation costs. The authors have developed a GSHP system that employs the cast-in-place concrete pile foundations of a building as heat exchangers in order to reduce the initial cost. In this system, eight U-tubes are arranged around the surface of a cast-in-place concrete pile foundation. The heat exchange capability of this system, subterranean temperature changes and heat pump performance were investigated in a full-scale experiment. As a result, the average values for heat rejection were 186~201 W/m(per pile, 25 W/m per pair of tubes) while cooling. The average COP of this system was 4.6 while cooling; rendering this system more effective in energy saving terms than the typical ASHP systems.
공동주택 냉방에너지절감을 위한 PCM 축열 건자재의 적정 상변화온도 분석
안상민(An Sang-Min),정창헌(Cheong Chang Heon),황석호(Hwang Suckho),이승복(Leigh Seung-Bok),김태연(Kim Taeyeon) 한국건축친환경설비학회 2010 한국건축친환경설비학회 학술발표대회 논문집 Vol.2010 No.10
The purpose of this study is to evaluate the cooling energy reduction performance of PCM wallboard in apartment buildings by using ESP-r simulation program. A PCM wallboard, which is constructed from the micro-encapsulated phase change materials as a uniform mixture with the conventional gypsum, is applied on the inside wall surfaces in the simulation model. The results show that the application of such materials for lightweight construction makes it possible to reduce fluctuation of inner temperature and energy consumption. Considering cooling load reduction, PCM designed whose solidification temperature close to the cooling set point temperature is appropriate in aparment buildings.