1997 Volume 10 Issue 2 Pages 119-127
By the recycle of heat used once in urban area, it is possible to reduce the emission of environmental load like carbon dioxide from urban activities. But for the realization of this recycle system like a district heating system with its heat source from sewage, not only the reduction of energy consumption or carbon dioxide emission but also its initial and running cost should be estimated and discussed. In this study, energy consumption, carbon dioxide emission and cost for the demand of space heating and hot water supply through the initial and running stage of the district heating system with its heat source from sewage was compared with an alternative plan, i.e. nonconstruction of district heating system. The fine geographic information data like precise mesh data of land use type or number of stories and the areal energy consumption were input in Geographic Information Systems (GIS). Main target of Life Cycle Assessment (LCA) had been products or materials. In this study, its target is "area" and the location of urban infrastructure is evaluated in the spatial field. In this meaning, this study is one of the attempts of new methodology for LCA itself. The application of LCA on the district heating system and the area on GIS is available and a large amount of demand for space heating and hot water supply gives an advantage for the introduction of a district heating system also in terms of LCA.
