Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Study on Development of a Ground-Source Heat Pump System Utilizing Cast-in-place Concrete Pile Foundation of a Building

현장타설형 건물 기초를 이용한 지중열 공조시스템의 성능평가에 관한 연구

  • Hwang, Suck-Ho (Center for Sustainable Buildings, Yonsei University) ;
  • Nam, Yu-Jin (Department of Architecture, Cheongju University)
  • 황석호 (연세대학교 친환경 건축연구센터) ;
  • 남유진 (청주대학교 건축공학과)
  • Received : 2010.02.02
  • Published : 2010.09.10
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Abstract

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.

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References

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