夏热冬冷地区绿色建筑的节能效益

针对目前常用绿色建筑节能技术及夏热冬冷气候特点,以案例形式分别对围护结构性能改善、能源综合利用等技术应用的效果进行分析,量化了绿色建筑节能技术的应用效益。研究结果表明:在目前常用的绿色建筑节能技术中,集中空调系统排风全热回收技术节能效益最大,达到35%节能率,过渡季节充分利用新风,会带来10%的节能率;合理设置可调节外遮阳和改变围护结构热工性能,可产生7%左右的节能率;采用光控措施控制照明系统,可形成12.3%的节能率;绿色建筑节能技术的选择及其应用效果受技术相互关联性影响较大,节能方案需要整体综合考量;节能技术的应用可使建筑在现行节能标准基础上再实现46.9%的节能率,达到建筑节能75%的要求。

Analysis of energy efficiency of green buildings in hot-summer and cold-winter zones in China

In terms of the common green buildings techniques obtained from statistics and climate features of hot-summer and cold-winter zone in China,a case study has been done.The effects of techniques,such as the enhancement of the performance of building envelope,energy comprehensive utilization,have been analyzed.The results show that the energy-saving benefit from total heat recovery of exhaust air which reaches 35％ is the biggest in those common green buildings techniques;the utilization of fresh air in interim can save 10％ energy;it could save as much as 7％ energy by the means of setting adjustable exterior shading or improving the thermal performance of building envelop;the energy-saving rate of light control is 12.3％,etc.The study indicates that the energy efficiency of green buildings techniques interact with each other.Therefore,a comprehensive consideration of an energy conservation scheme of green buildings must be taken.The results show comparing with the requirements of current energy-saving standards,the whole energy efficiency of green buildings can achieve 46.9％,which can save energy by 75 ％ compared with the reference building in the current energy-saving standards.