Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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A Study on Performance of Solar Thermal System for Domestic Hot Water According to the Weather Conditions and Feedwater Temperatures at Different Locations in Korea

지역별 기상조건과 급수온도에 따른 태양열 온수공급 시스템 성능에 관한 연구

  • Sohn, Jin Gug (Department of Mechanical & Automotive Engineering, Halla University)
  • 손진국 (한라대학교 기계자동차공학부)
  • Received : 2019.09.26
  • Accepted : 2019.11.20
  • Published : 2019.12.30
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Abstract

The purpose of this study is to analyze the performance of solar thermal system according to regional weather conditions and feedwater temperature. The performance analysis of the system was carried out for the annual and winter periods in terms of solar fraction, collector efficiency and it's optimal degree. The system is simulated using TRNSYS program for 6 cities, Seoul, Incheon, Gangneung, Mokpo, Gwangju, and Ulsan. Simulation results prove that the solar fraction of the system varies greatly from region to region, depending on weather conditions and feedwater temperatures. Monthly average solar fraction for winter season from November to February, a time when heat energy is most required, indicated that the highest is 73.6% in Gangnueng and the lowest is 56.9% in Seoul. This is about 30% relative difference between the two cities. On the other hand, the collector efficiency of the system for all six cities was analyzed in the range between 40% and 42%, indicating small difference compare to the solar fraction. The annual average solar fraction is rated the highest at 40 collector degree, while monthly average solar fraction during winter season is rated at 60 degree.

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References

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