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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Economic Investigation of Small Scale Cogeneration System in a School Dormitory of Busan Region

부산지역 학교 기숙사에서의 소형열병합발전 시스템의 경제성 분석

  • Song, Jae-Do (School of Mechanical Engineering, Pusan National University) ;
  • Ku, Bon-Cheol (School of Mechanical Engineering, Pusan National University) ;
  • Kang, Yul-Ho (School of Mechanical Engineering, Pusan National University) ;
  • Park, Jong-Kyu (School of Mechanical Engineering, Pusan National University) ;
  • Lee, Jae-Keun (EcoEnergy Research Institute) ;
  • Ahn, Young-Chull (Department of Architectural Engineering, Pusan National University)
  • Received : 2012.05.02
  • Published : 2012.09.10
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Abstract

The cogeneration system can operate at efficiencies greater than those achieved when heat and power are produced in separate. The optimal system can be determined by selecting the auxiliary system combined with cogeneration system. In the present study, economic investigation has been conducted with the cogeneration electric heat pump(EHP) system and the cogeneration absorption chiller(AC) system to install in a school dormitory. To analyze life cycle cost(LCC), cost items such as initial investment costs, annual energy costs and maintenance costs of each system have been considered. The initial investment cost is referred to the basis of estimated costs, and annual energy costs such as the electric power and gas consumption are based on the data in a school dormitory. LCC is evaluated with the present worth method. Considering investigated results, the initial investment cost of the cogeneration EHP system is more profitable about 24% than that of the cogeneration AC system. The energy cost of the cogeneration EHP system is more profitable about 8% than the cogeneration AC system. The LCC shows that the cogeneration EHP system is the most effective system in the school dormitory.

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