抄録
In planning energy supply systems, it is important to synthesize their structures rationally from economical, energy saving, and environmental viewpoints. In this paper, a multiobjective optimization approach is proposed for this purpose. Types, numbers and capacities of equipment can be determined to minimize the annual total cost, primary energy consumption and CO_2 emission. Assuming a system for a hospital, the economically optimal system is the hybrid system of electric and gas equipment. As the result of a trade-off analysis, it is clarified that a 3% increase of the annual total cost can achieve a 18% reduction of the annual primary energy and a 14% reduction of the annual CO_2 emission by installing electric equipment with high efficiencies preferentially.
