Structure of End-Use Energy Demand and Potential of Energy Saving in Residential Houses - Report of Energy Demand Monitoring Project in Kansai Science, Technology and Cultural City (No. 2)

摘要

The increase of the energy demand in the residential sector in Japan is still quite significant and energy saving in this sector is indispensable for achieving the reduction of CO{sub}2 emission. Therefore, better understanding of the ways of energy use in household is essential. The authors are carrying out a monitoring project in which electricity and city gas consumption and temperature are measured for residential houses in a newly developed town. Based on these monitored data, end-use energy demand such as space heating, cooling, etc. have been estimated. There is about 3.8 times difference between the household with the largest energy consumption and the one with the least energy consumption. It is important to clarify the causes of the difference for estimating the potential of energy saving. The authors pay attention to space heating, and have developed a model for estimating the demand that is represented by factors such as efficiency of heating system, insulation efficiency of houses and life-style. In this paper, the present state of end-use energy demand in the monitored houses will be given first. Second, the developed model will be described in detail, and then the potential of energy saving in residential houses will be discussed.