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Part load ratio characteristics and energy saving performance of standing column well geothermal heat pump system assisted with storage tank in an apartment

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  • Lee, Da Young
  • Seo, Byeong Mo
  • Hong, Sung Hyup
  • Choi, Jong Min
  • Lee, Kwang Ho

Abstract

A geothermal heat pump (GSHP) system has improved energy efficiency compared to conventional air-source heat pumps due to a more stable underground temperatures through the year. Among various types of GSHP systems, standing column well (SCW) system is a specialized type of open loop system, where water is drawn from the bottom of a deep rock well, passed through a heat pump, and returned to the top of the well, during which it exchanges heat with the surrounding bedrock. In this research a SCW system integrated with heat storage tank was assessed through dynamic energy simulation technique after comprehensive validation process of heat pump performance curves. For this purpose, the detailed analysis on the operational characteristics of SCW heat pump and its energy performance enhancement due to the connection with heat storage tank was performed, such as variations of part load ratios (PLRs), COP and the corresponding energy requirements, compared to window air-conditioner and boiler based conventional system. The results of this study showed that the SCW heat pump system connected with heat storage tank showed an annual energy saving of approximately 62% and 14% compared to the conventional system and the SCW system without heat storage tank, respectively. This indicates that energy efficiency can be significantly improved when SCW heat pump can be properly operated in combination with heat storage tank in residential buildings.

Suggested Citation

  • Lee, Da Young & Seo, Byeong Mo & Hong, Sung Hyup & Choi, Jong Min & Lee, Kwang Ho, 2019. "Part load ratio characteristics and energy saving performance of standing column well geothermal heat pump system assisted with storage tank in an apartment," Energy, Elsevier, vol. 174(C), pages 1060-1078.
    • Handle: RePEc:eee:energy:v:174:y:2019:i:c:p:1060-1078
    DOI: 10.1016/j.energy.2019.03.029
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    References listed on IDEAS

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    1. Nguyen, A. & Pasquier, P. & Marcotte, D., 2015. "Thermal resistance and capacity model for standing column wells operating under a bleed control," Renewable Energy, Elsevier, vol. 76(C), pages 743-756.
    2. Jeong-Heum Cho & Yujin Nam & Hyoung-Chan Kim, 2016. "Performance and Feasibility Study of a Standing Column Well (SCW) System Using a Deep Geothermal Well," Energies, MDPI, vol. 9(2), pages 1-13, February.
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    Citations

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    Cited by:

    1. Liu, Xin & Zuo, Yuning & Yin, Zekai & Liang, Chuanzhi & Feng, Guohui & Yang, Xiaodan, 2023. "Research on an evaluation system of the application effect of ground source heat pump systems for green buildings in China," Energy, Elsevier, vol. 262(PA).
    2. Dongsu Kim & Jongman Lee & Sunglok Do & Pedro J. Mago & Kwang Ho Lee & Heejin Cho, 2022. "Energy Modeling and Model Predictive Control for HVAC in Buildings: A Review of Current Research Trends," Energies, MDPI, vol. 15(19), pages 1-30, October.
    3. Emanuele Bonamente & Andrea Aquino, 2019. "Environmental Performance of Innovative Ground-Source Heat Pumps with PCM Energy Storage," Energies, MDPI, vol. 13(1), pages 1-15, December.
    4. Bernd Eppinger & Mustafa Muradi & Daniel Scharrer & Lars Zigan & Peter Bazan & Reinhard German & Stefan Will, 2021. "Simulation of the Part Load Behavior of Combined Heat Pump-Organic Rankine Cycle Systems," Energies, MDPI, vol. 14(13), pages 1-18, June.
    5. Huang, Renfang & Zhang, Zhen & Zhang, Wei & Mou, Jiegang & Zhou, Peijian & Wang, Yiwei, 2020. "Energy performance prediction of the centrifugal pumps by using a hybrid neural network," Energy, Elsevier, vol. 213(C).

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