抄録
Zero-energy-homes district has been developed in Kumagaya, a suburban city of Tokyo. Total of 73 houses of the district are all constructed with highly insulated wooden panels. Air-conditioners, hot water supply system, lighting equipment and ventilation system are carefully selected to minimize the energy consumption. HEMS, home energy management system, controls the windows and air-conditioners automatically so that the cooling load can be reduced without sacrificing thermal comfort even in summer. The houses are also equipped with Photovoltaic (PV) panels and city gas powered co-generation system. Electricity and gas consumption of the houses are now measured hourly. Power generations from PV panels as well as the co-generation systems are also measured. 22 out of the 73 households are now ready for evaluation since those families have lived in the district for more than a year. The data reveals that the annual energy balances of the households are “zero” on average.
