Performance optimization of a hybrid ground source heat pump with the parallel configuration of a ground heat exchanger and a supplemental heat rejecter in the cooling mode

Honghee Park, Joo Seoung Lee, Wonuk Kim, Yong Chan Kim

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

A hybrid ground source heat pump (HGSHP) combining a ground flow loop and a supplemental heat rejecter loop in parallel is proposed to overcome the degradation of the ground thermal condition. The objective of this study is to optimize the performance of the HGSHP with the parallel configuration by varying the amount of refrigerant charge, the secondary fluid flow rate of the ground loop, and the secondary fluid flow rate of the supplemental loop. The coefficient of performance (COP) of the HGSHP with the parallel configuration was 21% higher than that of the conventional ground source heat pump (GSHP), and the heat rejection rate of the ground flow loop was 42% lower than that of the GSHP at the entering fluid temperature (EFT) of 40 °C in the ground heat exchanger and the EFT of 28 °C in the supplemental heat exchanger.

Original languageEnglish
Pages (from-to)1537-1546
Number of pages10
JournalInternational Journal of Refrigeration
Volume35
Issue number6
DOIs
Publication statusPublished - 2012 Sep 1

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Geothermal heat pumps
Heat exchangers
Cooling
Flow of fluids
Flow rate
Fluids
Refrigerants
Hot Temperature
Degradation
Temperature

Keywords

  • COP
  • fFow rate
  • Ground source
  • Heat pump
  • Optimization
  • Performance

ASJC Scopus subject areas

  • Mechanical Engineering
  • Building and Construction

Cite this

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abstract = "A hybrid ground source heat pump (HGSHP) combining a ground flow loop and a supplemental heat rejecter loop in parallel is proposed to overcome the degradation of the ground thermal condition. The objective of this study is to optimize the performance of the HGSHP with the parallel configuration by varying the amount of refrigerant charge, the secondary fluid flow rate of the ground loop, and the secondary fluid flow rate of the supplemental loop. The coefficient of performance (COP) of the HGSHP with the parallel configuration was 21{\%} higher than that of the conventional ground source heat pump (GSHP), and the heat rejection rate of the ground flow loop was 42{\%} lower than that of the GSHP at the entering fluid temperature (EFT) of 40 °C in the ground heat exchanger and the EFT of 28 °C in the supplemental heat exchanger.",
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