Transient performance characteristics of a hybrid ground-source heat pump in the cooling mode

Joo Seong Lee; Honghee Park; Yongchan Kim

doi:10.1016/j.apenergy.2014.02.056

Transient performance characteristics of a hybrid ground-source heat pump in the cooling mode

Joo Seong Lee, Honghee Park, Yongchan Kim

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

The objective of this study is to compare the transient performance characteristics between a ground-source heat pump (GSHP) and a hybrid ground-source heat pump (HGSHP), accounting for the degradation of the ground thermal condition during long-term operation. A heat storage bath for the ground heat exchanger (GHE) was adopted to simulate the transient characteristics of the ground thermal condition. In transient state, the performances of the HGSHP and GSHP were measured by changing the fluid flow rate (FFR) through the supplementary plate heat exchanger (SPHE) and the set-point temperature of the hybrid operation. The optimum FFR and the optimum set-point temperature of the HGSHP were determined as 8kgmin^-1 and 30°C, respectively. At the optimized conditions, the average COP of the HGSHP increased by 7.2% compared with that of the GSHP.

Original language	English
Pages (from-to)	121-128
Number of pages	8
Journal	Applied Energy
Volume	123
DOIs	https://doi.org/10.1016/j.apenergy.2014.02.056
Publication status	Published - 2014 Jun 15

Keywords

COP
Ground thermal degradation
Heat storage bath
Hybrid ground-source heat pump
Optimum
Transient state

ASJC Scopus subject areas

Building and Construction
Energy(all)
Mechanical Engineering
Management, Monitoring, Policy and Law

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10.1016/j.apenergy.2014.02.056

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title = "Transient performance characteristics of a hybrid ground-source heat pump in the cooling mode",

abstract = "The objective of this study is to compare the transient performance characteristics between a ground-source heat pump (GSHP) and a hybrid ground-source heat pump (HGSHP), accounting for the degradation of the ground thermal condition during long-term operation. A heat storage bath for the ground heat exchanger (GHE) was adopted to simulate the transient characteristics of the ground thermal condition. In transient state, the performances of the HGSHP and GSHP were measured by changing the fluid flow rate (FFR) through the supplementary plate heat exchanger (SPHE) and the set-point temperature of the hybrid operation. The optimum FFR and the optimum set-point temperature of the HGSHP were determined as 8kgmin-1 and 30°C, respectively. At the optimized conditions, the average COP of the HGSHP increased by 7.2% compared with that of the GSHP.",

keywords = "COP, Ground thermal degradation, Heat storage bath, Hybrid ground-source heat pump, Optimum, Transient state",

author = "Lee, {Joo Seong} and Honghee Park and Yongchan Kim",

note = "Funding Information: This work was supported by the Human Resources Development Program (No. 20124010203250) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea Government Ministry of Trade, Industry and Energy. ",

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doi = "10.1016/j.apenergy.2014.02.056",

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AU - Lee, Joo Seong

AU - Park, Honghee

AU - Kim, Yongchan

N1 - Funding Information: This work was supported by the Human Resources Development Program (No. 20124010203250) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea Government Ministry of Trade, Industry and Energy.

PY - 2014/6/15

Y1 - 2014/6/15

N2 - The objective of this study is to compare the transient performance characteristics between a ground-source heat pump (GSHP) and a hybrid ground-source heat pump (HGSHP), accounting for the degradation of the ground thermal condition during long-term operation. A heat storage bath for the ground heat exchanger (GHE) was adopted to simulate the transient characteristics of the ground thermal condition. In transient state, the performances of the HGSHP and GSHP were measured by changing the fluid flow rate (FFR) through the supplementary plate heat exchanger (SPHE) and the set-point temperature of the hybrid operation. The optimum FFR and the optimum set-point temperature of the HGSHP were determined as 8kgmin-1 and 30°C, respectively. At the optimized conditions, the average COP of the HGSHP increased by 7.2% compared with that of the GSHP.

AB - The objective of this study is to compare the transient performance characteristics between a ground-source heat pump (GSHP) and a hybrid ground-source heat pump (HGSHP), accounting for the degradation of the ground thermal condition during long-term operation. A heat storage bath for the ground heat exchanger (GHE) was adopted to simulate the transient characteristics of the ground thermal condition. In transient state, the performances of the HGSHP and GSHP were measured by changing the fluid flow rate (FFR) through the supplementary plate heat exchanger (SPHE) and the set-point temperature of the hybrid operation. The optimum FFR and the optimum set-point temperature of the HGSHP were determined as 8kgmin-1 and 30°C, respectively. At the optimized conditions, the average COP of the HGSHP increased by 7.2% compared with that of the GSHP.

KW - COP

KW - Ground thermal degradation

KW - Heat storage bath

KW - Hybrid ground-source heat pump

KW - Optimum

KW - Transient state

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SN - 0306-2619

VL - 123

SP - 121

EP - 128

JO - Applied Energy

JF - Applied Energy

ER -

Transient performance characteristics of a hybrid ground-source heat pump in the cooling mode

Abstract

Keywords

ASJC Scopus subject areas

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