23 September 2011
We verified with simulation that our challenging office building project, which we have been developing for CO2 emission saving, can achieve 55% CO2 emission reduction compared to conventional office buildings in Japan. In order to achieve such a drastic
reduction, we are adopting passive as well as active methods of utilizing natural energy. The passive methods are utilizing natural energy sources and thermal performance of building.
The active methods are combination of ground coupled heat pumps and air source heat pumps. The former is combined with well water cooling and produces medium chilled water, which is utilizing for latent heat thermal storage system. In addition, Building and Energy
Management System and other management systems are adopted to manage to control building energy consumption. Furthermore, the building is rated as S rank of Comprehensive
Assessment System for Built Environmental Efficiency (CASBEE®) and achieved 7.6 scores of BEE which was possible of adopting the overall reduction in environmental burdens. We
are planning to accumulate and analyze the data, which must be fundamental to achieve Net Zero Energy Building in the future.