Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Optimizing the Life Cycle Cost of a Solar Water Heating System in an Office Building Through Simulation

사무소건물 태양열급탕시스템의 LCC 최적화 시뮬레이션

  • Ko, Myeong-Jin (Department of Architectural Engineering, University of Incheon) ;
  • Choi, Doo-Sung (Dept. of Building Equip. and Fire Protection System, Chungwoon University) ;
  • Chang, Jae-D. (School of Architecture, Design and Planning, University of Kansas) ;
  • Kim, Yong-Shik (Department of Architectural Engineering, University of Incheon)
  • 고명진 (인천대학교 건축공학과) ;
  • 최두성 (청운대학교 건축설비소방학과) ;
  • 장재동 (캔사스대학교 건축대학) ;
  • 김용식 (인천대학교 건축공학과)
  • Received : 2010.09.15
  • Accepted : 2010.10.14
  • Published : 2010.12.10
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Abstract

This study examined the economics of a solar water heating system for an office building using life cycle cost (LCC) optimization simulations. The numerical simulations were conducted with TRNSYS and GenOpt employing the Hooke-Jeeves algorithm. The solar collector area, slope, mass flow rate per collector area and storage tank volume were selected as the main design parameters of the solar water heating system. The LCC optimization simulations of the system were carried out for cases where water temperature was $60^{\circ}C$ and $50^{\circ}C$. The results showed that for water temperature at $60^{\circ}C$ and $50^{\circ}C$ the collector area could be decreased by 17% and 28%, storage tank volume could be decreased by 49% and 54%, and mass flow rate per collector area increased by 5% and 9% respectively compared to a non-optimized system. The LCC of the system was reduced by 4% for $60^{\circ}C$ and 7% for $50^{\circ}C$. The initial installation cost of the system was reduced by 24% for $60^{\circ}C$ and 34% for $50^{\circ}C$. However, the operating cost of the system increased by 16% for $60^{\circ}C$ and 36% for $50^{\circ}C$ compared to a traditional solar water heating system.

Keywords

References

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