JAUE2014-081 Energy Infrastructure Reconstruction at Massive Housing Complex for more Robust and Secure Community in Suburban Tokyo

Abstract

Spread in the north-west of Tokyo metropolis along the Arakawa River, Takashimadaira housing complex was once called “The Mammoth of the Orient”. However, because it is over 40 years since the completion of formerly innovative” apartments and the birth rate continues to decline, its population has now dropped from 25,000 in 1990s to 16,000 with proportion of the elderly accounts for 40% of the residents. Therefore Urban Renaissance Agency (UR), the owner of the complex, is promoting variety of plans to reactivate the complex by renovating spare rooms and providing various services to attract young generation. Itabashi local government has also launched plans to renovate the entire area as a model for a robust and secure community. They will include renovation of a closed-down elementary school to a smart and safe community center with multiplex electricity supply to hospitals and earthquake shelters with reliable gas cogeneration. The plan will also utilize exhaust heat from Itabashi waste incineration plant. In coordination with UR and the local government, the study introduces BCP-compatible independent distributed energy supply systems utilizing city gas and waste heat networks and evaluates their effectiveness on energy saving and reduction in CO2 emission