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Energy Performance Evaluation of Shallow Ground Source Heat Pumps for Residential Buildings

Author

Listed:
  • Archan Shah

    (Department of Civil, Environmental and Architectural Engineering, University of Colorado Boulder, Boulder, CO 80309, USA)

  • Moncef Krarti

    (Department of Civil, Environmental and Architectural Engineering, University of Colorado Boulder, Boulder, CO 80309, USA)

  • Joe Huang

    (White Box Technologies, Moraga, CA 94556, USA)

Abstract

This paper evaluates the energy performance of shallow ground source heat pumps using the state-of-art whole building energy simulation tool. In particular, the paper presents a systematic and easy to implement approach to model the energy performance of shallow and helical ground heat exchangers and assess their energy efficiency benefits to heat and cool buildings. The modeling approach is based on the implementation of G-functions, generated using a validated numerical model, in a state-of-art whole building energy simulation tool. Both the numerical model and the simulation tool are applied to assess the energy performance of various shallow geothermal systems designed to meet heating and cooling needs for detached single-family homes in California. Specifically, a series of sensitivity analyses is conducted to determine the energy performance of the shallow geothermal systems in 16 locations representing all California climate zones. It is found that the suitability and the efficiency of the shallow geothermal systems vary widely and depend on several factors including their design specifications as well as the climate conditions. Compared with conventional air-to-air heat pumps, the shallow ground source heat pumps can be more energy efficient in most climate zones in California except those locations with extreme weather conditions resulting in either heating or cooling only operation. Moreover, configurations of shallow ground source heat pumps with 16 boreholes with 6.7 m (22 ft) depth are found to be cost-effective in several California climate zones.

Suggested Citation

  • Archan Shah & Moncef Krarti & Joe Huang, 2022. "Energy Performance Evaluation of Shallow Ground Source Heat Pumps for Residential Buildings," Energies, MDPI, vol. 15(3), pages 1-25, January.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:3:p:1025-:d:738234
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    References listed on IDEAS

    as
    1. Mustafa Omer, Abdeen, 2008. "Ground-source heat pumps systems and applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 12(2), pages 344-371, February.
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    Cited by:

    1. Yujiao Li & Peng Liu & Wei Wang & Xianmin Ke & Yiwen Jiao & Yitian Liu & Haotian Liang, 2023. "Optimizing the Layout of a Ground Source Heat Pump System with a Groundwater–Thermal Coupling Model," Energies, MDPI, vol. 16(19), pages 1-18, September.
    2. Nan Yang & Weixiu Shi & Zihong Zhou, 2023. "Research on Application and International Policy of Renewable Energy in Buildings," Sustainability, MDPI, vol. 15(6), pages 1-25, March.
    3. Cristina Sáez Blázquez & Ignacio Martín Nieto & Javier Carrasco García & Pedro Carrasco García & Arturo Farfán Martín & Diego González-Aguilera, 2023. "Comparative Analysis of Ground Source and Air Source Heat Pump Systems under Different Conditions and Scenarios," Energies, MDPI, vol. 16(3), pages 1-16, January.

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