集中冷暖房から個別空調への変更による省エネルギー効果

摘要

産総研つくばセンターは，産業技術総合研究所（産総研）rnの拠点のひとつであり，東京の北東60kmの茨城県つくばrn市に位置する。図1に示すつくばセンターの東事業所およrnび中央地区の空調システムは，中央地区にあるエネルギーrnセンターからの冷温水供給を利用して集中冷暖房を行う小rn規模な地域冷暖房システムであった。%An advanced distributed heating and cooling system utilizing small-scale high performance heat pumps was designed to replace the central heating and cooling system for the AIST laboratory buildings, which have a total floor area of 36,100 m~2, of which 20,100 m~2 is occupied by laboratories. In the old system, the total primary energy required for hot water was 44 TJ and it was 12 TJ for chilled water in FY2001. The new system is composed of small-sized high-performance heat pumps, with an average coefficient of performance (COP) of 3.1. After the reconstruction, the energy consumption was reduced to 37%, and with a total energy saving of 44 TJ for one year. And the total CO_2 emission is estimated to be 26%, a reduction of 3,000 tons of per year. The energy saving is caused by the high performance small-scale heat pumps, the high-performance total system design that takes laboratory into account and the suitable operation of the system.