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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Performance Prediction of Geothermal Heat Pump(GHP) System Using Cast-in-Place Energy Piles

현장 타설 에너지파일을 적용한 지열 히트펌프 시스템의 성능 예측

  • Sohn, Byonghu (Green Building Research Division, Korea Institute of Construction Technology) ;
  • Jung, Kyung-Sik (S-Tech Consulting Group) ;
  • Choi, Hangseok (School of Civil, Environmental and Architectural Engineering, Korea University)
  • 손병후 (한국건설기술연구원 그린빌딩연구실) ;
  • 정경식 ((주)에스텍컨설팅그룹) ;
  • 최항석 (고려대학교 건축사회환경공학과)
  • Received : 2012.10.31
  • Published : 2013.01.10
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Abstract

The aim of this study is to evaluate the performance of the GHP system with 45 cast-in-place energy piles(CEP) for a commercial building. In order to demonstrate the feasibility of a sustainable performance of the system, transient simulations were conducted over 1-year and 20-year periods, respectively. The 1-year simulation results showed that the maximum and minimum temperatures of brine returning from the CEPs were $23.91^{\circ}C$ and $6.66^{\circ}C$, which were in a range of design target temperatures. In addition, after 20 years' operation, these returning temperatures decreased to $21.24^{\circ}C$ and $3.68^{\circ}C$, and finally reached to stable state. Annual average extraction heat of cast-in-place energy piles was 94.3 MWh and injection heat was 65.7 MWh from the 20 years of simulation results. Finally, it is expected this GHP system can operate with average heating SPF of more than 3.45 for long-term.

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References

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