Cogen EHP 시스템의 경제성 분석

This study is to analyze the economic efficiency of the Cogen EHP system which combines a cogeneration system with an EHP. The Cogen EHP system is compared with the electric boiler and EHP system where both the electric power and the heat demands were necessary for cooling and heating and hot water. For the economic analysis, the economic efficiency evaluation index such as energy reduction cost, cost performance factor and peak load decrement is defined. We obtained the energy consumptions and energy costs by using a electricity and LNG gas charging system, equipment specification of the system, and load data of universities and hotels. Also, we calculated both the contract electric power and its basic rate which have substantial effects on peak load in summer season, and then added up it to the total energy cost. We analyzed the economic efficiency of the Cogen EHP system by applying the energy consumptions and energy costs in the economic efficiency evaluation index. The results of analysis showed the cost reduction effect with Cogen EHP system by 11% for universities, and by 35% for hotels, respectively.