Abstract

The relationships between optimal capacities and installed number of microturbine cogeneration units and maximum energy demands are surveyed based on an optimization approach. Equipment capacities, installed number of the microturbine cogeneration units and maximum contract demands of utilities such as electricity and natural gas are determined so as to minimize the annual total cost in consideration of operational strategies subject to satisfaction of energy demand requirements. Numerical studies are carried out on microturbine cogeneration systems installed in hotels and office buildings by changing the maximum energy demand. Through the studies, the relationships between the optimal capacities and the installed number of the microturbine cogeneration units and the maximum energy demands are clarified, and it is found that plural microturbine cogeneration units may be installed from an economic viewpoint.

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