Proceedings of the SAREK Conference (대한설비공학회:학술대회논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
권호 표지

Heating Performance of a Ground Source Heat Pump System through Actual Operation

지열원 히트펌프시스템의 실사용을 통한 난방성능연구

  • Koo, Kyoung-Min (Department of Mechanical Engineering, Pusan National University) ;
  • Jeong, Young-Man (Department of Mechanical Engineering, Pusan National University) ;
  • Hwang, Yu-Jin (Department of Mechanical Engineering, Pusan National University) ;
  • Lee, Jae-Keun (Department of Mechanical Engineering, Pusan National University) ;
  • Jang, Se-Yong (Department of Mechanical Engineering, Pusan National University) ;
  • Kim, In-Kyu (Digital Appliance Laboratory, LG Electronics) ;
  • Jin, Sim-Won (Digital Appliance Laboratory, LG Electronics) ;
  • Lee, Dong-Hyuk (Digital Appliance Laboratory, LG Electronics)
  • Published : 2008.06.25
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Abstract

This paper presents the heating performance of a water-to-refrigerant type ground source heat pump system (GSHP) installed in a school building. The evaluation of the heating performance has been conducted under the actual operating conditions of GSHP system in the winter. Ten units with the capacity of 10 HP each were installed in the building. Also, a closed vertical typed-ground heat exchanger with 24 boreholes of 175 m in depth was constructed for the GSHP system. For analyzing the heating performance of the GSHP system, we monitored various operating conditions, including the outdoor temperature, the ground temperature, and the water temperature of inlet and outlet of the ground heat exchanger. Simultaneously, the heating capacity and the input power were evaluated for determining the heating performance of the GSHP system. The average heating coefficient of performance (COP) of the heat pump was found to be 5.1 at partial load of 46.9%, while the overall system COP was found to be 4.2.

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