308 固体電解質形燃料電池・マイクロタービン・ハイブリッド・システムの多目的最適導入計画

概要

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Economic, energy-saving and environmental protection feasibilities of solid oxide electrolyte fuel cell(SOFC) and SOFC/microturbine(MT) hybrid cogeneration systems are investigated based on a multiobjective optimization approach. Equipment capacities and maximum contract demands of utilities such as electricity and natural gas are determined so as to minimize the annual total cost, the annual primary energy consumption and the annual CO_2 emission in consideration of operational strategies subject to satisfaction of all the energy demand requirments. The ε-constraint method is adopted as a solution one for the above multiobjective optimization problem. Numerical studies are carried out on SOFC and SOFC/MT hybrid cogeneration systems installed in hotel and a office building by changing the capital unit costs of the SOFC and SOFC/MT cogeneration units. Through the studies, the trade-off relationships between the economic, energy-saving and environmental protection properties are clarified, and it is found that the SOFC/MT hybrid system is excellent from viewpoints of energy-saving and environmental protection properties.