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Constructing a Database of Reference Hydrothermal Sources for a Zero-Energy Building Certification Rating in South Korea and Analyzing the Renewable Energy Self-Sufficiency Rate Achieved by Water-Source Heat Pumps

Author

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  • Yeweon Kim

    (Building Energy Research Department, Korea Institute of Civil Engineering and Building Technology, Ilsan 10223, Republic of Korea)

  • Ki-Hyung Yu

    (Building Energy Research Department, Korea Institute of Civil Engineering and Building Technology, Ilsan 10223, Republic of Korea)

Abstract

This study aims to institutionalize an evaluation methodology to assess water-source heat pumps (WSHPs) when designing a zero-energy building. Thus, regions where zero-energy buildings were designed were subdivided into 66 sub-regions, thereby standardizing the temperatures on the source side of WSHPs using river water and pipeline water. Based on these data, ground-source and water-source heat pump system-based simulation (new and renewable energy self-sufficiency rate compared to building energy consumption) values were derived for cases whose condition (region or heat source) was different among the buildings certified as zero-energy buildings. The application of the standard meteorological data and reference hydrothermal data to the ECO2 program and outcome evaluation led to the following findings: in all cases (reference: Seoul), ground-source heat pumps (GSHPs) showed a higher self-sufficiency rate than WSHPs (ground source > pipeline water > river water). The self-sufficiency rate of GSHPs was 11–33% higher than that of WSHPs. In a regional comparison among the cold (Jeongseon), central (Seoul), and southern (Jeju Island) regions, WSHPs exhibited higher energy self-sufficiency rates than GSHPs under the conditions of higher water temperatures in winter and lower water temperatures in summer, as in the southern region.

Suggested Citation

  • Yeweon Kim & Ki-Hyung Yu, 2023. "Constructing a Database of Reference Hydrothermal Sources for a Zero-Energy Building Certification Rating in South Korea and Analyzing the Renewable Energy Self-Sufficiency Rate Achieved by Water-Sour," Energies, MDPI, vol. 16(1), pages 1-11, January.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:1:p:543-:d:1023836
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    References listed on IDEAS

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    3. Zhu, Na & Hu, Pingfang & Wang, Wei & Yu, Jianming & Lei, Fei, 2015. "Performance analysis of ground water-source heat pump system with improved control strategies for building retrofit," Renewable Energy, Elsevier, vol. 80(C), pages 324-330.
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