Journal of the Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회논문집)

Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회)
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Cooling Performance Analysis of Ground-Source Heat Pump System with Capacity Control with Outdoor Air Temperature

외기 온도 제어 방식을 적용한 지열 히트펌프 시스템의 냉방 성능 분석

  • 손병후 (한국건설기술연구원 건축에너지연구소)
  • Received : 2021.11.02
  • Accepted : 2021.11.24
  • Published : 2021.12.01
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Abstract

In order to solve the increasing deterioration of the energy shortage problem, ground-source heat pump (GSHP) systems have been widely installed. The control method is a significant component for maintaining the long-term performance and for reducing operation cost of GSHP systems. This paper presents the measurement and analysis results of the cooling performance of a GSHP system using capacity control with outdoor air temperature. For this, we installed monitoring equipments including sensors for measuring temperature, flow rate and power consumption, and then monitored operation parameters from July 9, 2021 to October 2, 2021. From measurement results, we analyze the effect of capacity control with outdoor air temperature on the cooling performance of the system. The average performace factor (PF) of the heat pump was 6.95, while the whole system was 5.54 over the measurement period. Because there was no performance data of the existing GSHP system, it was not possible to directly compare the existing control method and the outdoor air temperature method. However, it is expected that the performance of the entire system will be improved by adjusting the temperature of cold water produced by the heat pump, that is, the temperature of cold water on the load side according to the outside air temperature.

Keywords

Acknowledgement

본 논문의 내용은 산업통상자원부의 재원으로 한국에너지기술평가원의 지원을 받아 수행한 연구결과입니다(No.20172010105610). 아울러 논문의 일부 내용은 한국수자원공사의 재정 지원(KICT 과제 번호: 20210620-001)을 받아 수행한 결과입니다.

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