• Title/Summary/Keyword: Heating-conditioning

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Heating Performance of Geothermal Heat Pump System Applied in Cold Climate Region(Mongolia) (한랭지(몽골) 지열 히트펌프 시스템의 난방 성능 분석)

  • Sohn, Byonghu;Choi, Jae Ho;Min, Kyung Chon
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.27 no.1
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    • pp.31-38
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    • 2015

  • Geothermal heat pump (GHP) systems have become an efficient alternative to conventional cooling and heating methods due to their higher energy using efficiency. These systems use the ground as a heat source in heating mode operation and a heat sink in cooling mode operation. The aim of this study is to evaluate the heating performance of the GHP system for a residential building ($420m^2$) in Ulaanbaatar, Mongolia. In order to demonstrate the feasibility of a sustainable performance of this system, we installed the water-to-water geothermal heat pump with ten vertical ground heat exchangers and measured operation parameters from October 19, 2013 to March 26, 2014. The results showed that the entering source temperature of brine from the ground heat exchangers was in a range of the design target temperature of $-10^{\circ}C$ for heating. For total values of the representative results, the ground heat exchangers extracted heat of 53.51 MWh from the ground. In addition, the GHP system supplied heat of 83.55 MWh to the building and consumed power of 30.27 MWh. Consequently, the average heating seasonal performance factor ($SPF_h$) of the overall system was evaluated to be 2.76 during the measurement period of the heating season.

  • https://doi.org/10.6110/KJACR.2015.27.1.031 인용 PDF KSCI

Study on the revision of Heating Degree-days for Korea (국내 난방도일의 재정립에 관한 연구)

  • Kim, Seong-Su;Cho, Sung-Hwan;Choi, Chang-Yong;Kim, Sang-Ho;Kim, Youn-Hong
    • Proceedings of the SAREK Conference
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    • 2007.11a
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    • pp.17-22
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    • 2007

  • Global average temperature rise accelerates by global warming in the three decades of the 20th century. But now we use heating degree days which was established 20 years ago. Therefore new heating degree days for 15 district areas of korea was determined using long-term measured data. Five different base temperatures ranging from 24 to $16^{\circ}C$ were chosen in the calculation of heating degree days. And yearly heating degree days were given in the tabular form.

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