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An Environmental and Economic Assessment for Selecting the Optimal Ground Heat Exchanger by Considering the Entering Water Temperature

Author

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  • Jimin Kim

    (Department of Architectural Engineering, Yonsei University, Seoul 120-749, Korea)

  • Taehoon Hong

    (Department of Architectural Engineering, Yonsei University, Seoul 120-749, Korea
    These authors contributed equally to this work.)

  • Myeongsoo Chae

    (Department of Architectural Engineering, Yonsei University, Seoul 120-749, Korea
    These authors contributed equally to this work.)

  • Choongwan Koo

    (Department of Architectural Engineering, Yonsei University, Seoul 120-749, Korea
    These authors contributed equally to this work.)

  • Jaemin Jeong

    (Department of Architectural Engineering, Yonsei University, Seoul 120-749, Korea
    These authors contributed equally to this work.)

Abstract

In order to solve environmental problems such as global warming and resource depletion in the construction industry, interest in new renewable energy (NRE) systems has increased. The ground source heat pump (GSHP) system is the most efficient system among NRE systems. However, since the initial investment cost of the GSHP is quite expensive, a feasibility study needs to be conducted from the life-cycle perspective. Meanwhile, the efficiency of GSHP depends most significantly on the entering water temperature (EWT) of the ground heat exchanger (GHE). Therefore, this study aims to assess the environmental and economic effects of the use of GHE for selecting the optimal GHE. This study was conducted in three steps: (i) establishing the basic information and selecting key factors affecting GHE performances; (ii) making possible alternatives of the GHE installation by considering EWT; and (iii) using life-cycle assessment and life-cycle cost, as well as comprehensive evaluation of the environmental and economic effects on the GHE. These techniques allow for easy and accurate determination of the optimal design of the GHE from the environmental and economic effects in the early design phase. In future research, a multi-objective decision support model for the GSHP will be developed.

Suggested Citation

  • Jimin Kim & Taehoon Hong & Myeongsoo Chae & Choongwan Koo & Jaemin Jeong, 2015. "An Environmental and Economic Assessment for Selecting the Optimal Ground Heat Exchanger by Considering the Entering Water Temperature," Energies, MDPI, vol. 8(8), pages 1-25, July.
    • Handle: RePEc:gam:jeners:v:8:y:2015:i:8:p:7752-7776:d:53342
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    2. Jeongyoon Oh & Taehoon Hong & Hakpyeong Kim & Jongbaek An & Kwangbok Jeong & Choongwan Koo, 2017. "Advanced Strategies for Net-Zero Energy Building: Focused on the Early Phase and Usage Phase of a Building’s Life Cycle," Sustainability, MDPI, vol. 9(12), pages 1-52, December.
    3. Hyeongjin Moon & Jae-Young Jeon & Yujin Nam, 2020. "Development of Optimal Design Method for Ground-Source Heat-Pump System Using Particle Swarm Optimization," Energies, MDPI, vol. 13(18), pages 1-17, September.
    4. Hyeongjin Moon & Hongkyo Kim & Yujin Nam, 2019. "Study on the Optimum Design of a Ground Heat Pump System Using Optimization Algorithms," Energies, MDPI, vol. 12(21), pages 1-17, October.

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