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

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  • Lee, Joo Seong
  • Park, Honghee
  • Kim, Yongchan

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.

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  • Lee, Joo Seong & Park, Honghee & Kim, Yongchan, 2014. "Transient performance characteristics of a hybrid ground-source heat pump in the cooling mode," Applied Energy, Elsevier, vol. 123(C), pages 121-128.
    • Handle: RePEc:eee:appene:v:123:y:2014:i:c:p:121-128
    DOI: 10.1016/j.apenergy.2014.02.056
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    References listed on IDEAS

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    3. Weibo Yang & Binbin Yang & Rui Xu, 2018. "Experimental Study on the Heat Release Operational Characteristics of a Soil Coupled Ground Heat Exchanger with Assisted Cooling Tower," Energies, MDPI, vol. 11(1), pages 1-17, January.
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    5. Bozkaya, Basar & Zeiler, Wim, 2020. "The energy efficient use of an air handling unit for balancing an aquifer thermal energy storage system," Renewable Energy, Elsevier, vol. 146(C), pages 1932-1942.
    6. Lee, Minwoo & Lee, Dongchan & Park, Myeong Hyeon & Kang, Yong Tae & Kim, Yongchan, 2022. "Performance improvement of solar-assisted ground-source heat pumps with parallelly connected heat sources in heating-dominated areas," Energy, Elsevier, vol. 240(C).
    7. Xie, Yiwei & Hu, Pingfang & Peng, Donggen & Zhu, Na & Lei, Fei, 2023. "Development of a group control strategy based on multi-step load forecasting and its application in hybrid ground source heat pump," Energy, Elsevier, vol. 273(C).
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    9. Lee, Minwoo & Ham, Se Hyeon & Lee, Sewon & Kim, Jinyoung & Kim, Yongchan, 2023. "Multi-objective optimization of solar-assisted ground-source heat pumps for minimizing life-cycle cost and climate performance in heating-dominated regions," Energy, Elsevier, vol. 270(C).
    10. Lee, Joo Seong & Song, Kang Sub & Ahn, Jae Hwan & Kim, Yongchan, 2015. "Comparison on the transient cooling performances of hybrid ground-source heat pumps with various flow loop configurations," Energy, Elsevier, vol. 82(C), pages 678-685.
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