Abstract
Recently it has become important to establish the local environmental preservation level based on the Agenda 21 including the local energy system In this study we examined the improvement techniques on an urban energy system in snowy cold region. We surveyed the possibility of new urban energy system like waste heat from incineration plants and sewage plants. We analyzed the results using fuzzy utility function and structural modeling. We simulated several scenarios on the urban new energy system which can be introduced and evaluated by using cost-performance with environmental cost. We proposed the rational energy system in a residential area in Sapporo practically.
