Measured Energy Performance of a US-China Demonstration Energy-Efficient Office Building

摘要

In July 1998, the US Department of Energy (USDOE) and China's Ministry of Science and Technology (MOST) signed a Statement of Work (SOW) to collaborate on the design and construction of an energy-efficient demonstration office building and design center to be located in Beijing. The proposed 13,000 m~2 (140,000 ft~2), nine-story office building would use US energy-efficient materials, space-conditioning systems, controls, and design principles that were judged to be widely replicable throughout China. The SOW stated that China would contribute the land and provide for the costs of the base building, and the US would be responsible for the additional (or marginal) costs associated with the package of energy-efficient and renewable energy improvements to the building. The project was finished and the building occupied in 2004. Using DOE-2 to analyze the energy performance of the as-built structure, the building obtained 44 out of 69 possible points according to the Leadership in Energy and Environmental Design (LEED) rating, including the full maximum of 10 points in the energy performance section. The building achieved a LEED Gold rating, the first such LEED-rated office building in China, and is 60% more efficient than a building designed according to ASHRAE 90.1-1999. Utility data from the first year's operation match well with results of the analysis with adjustment for unexpected changes in occupancy and operations. Comparedwith similarly equipped office buildings in Beijing, this demonstration building uses 60% less energy per floor area. However, compared to conventional office buildings with less equipment and window air conditioners, the building uses slightly more energy per floor area.