IMPROVING SUSTAINABILITY OF BUILDING BLOCKS BY EXTENDED USE OF DECENTRALIZED COMBINED HEAT AND POWER SYSTEMS

To achieve the Kyoto Protocol target, additional measures for reducing GHGs from the building sectoris a strong requirement in Japan. While this situation, building occupants are eager to secure asufficient energy supply in terms of developing business and living continuity plan (BLCP). To dealwith both of these issues, we are proposing the concept "Sustainable Town", the key items of whichare; 1) electric and thermal load leveling by block-scale load aggregation, 2) installation ofdecentralized combined heat and power (CHP) supply system, 3) installation of private electric wire andthermal pipelines in the block. By effective management of these items within a building block, totalenergy saving (primary energy efficiency) and risk reduction against disease can be increased; this cannot be achieved within a single building. Many densely-constructed blocks, such as in central businessdistricts have a great potential to reduce GHGs along with contributing BLCP in the district. Casestudies being conducted to some existing blocks in Tokyo are also introduced.