학교 기숙사 순시 부하 패턴에 따른 소형열병합발전 경제성 분석

Cogeneration systems can simultaneously produce electricity and heat energy. Applications of cogeneration systems have been increased in residential buildings and factories in Korea. In order to optimize the configuration of cogeneration, a capacity based on the pattern of annual demands of electricity, heating and cooling of application site are considered. This paper describes energy demands patterns and rate of power to heat based on electricity and heat loads in dormitory. In addition, It describes the optimal a capacity of the cogeneration system and payback period in university dormitory. The optimal design for cogeneration system with the increase of the capacity considering life cycle cost(LCC) analysis has been performed in the dormitory. In spite of the fact that previous LCC analysis was based on the monthly energy consumption, the developed LCC analysis was based on the heat-power rate according to hourly energy consumption. So developed LCC analysis anticipated the operation rate of cogeneration system more correctly. Variables used in LCC analysis are electricity cost escalation rate, interest rate, and service lives. In addition, the payback period for the optimal cogeneration system depending on the energy tariff system was calculated. When cost of electricity system multiplies 2.2, a payback period becomes 10 years in 60 kW capacity of a cogeneration system.