新风系统在我国超低能耗建筑中的应用及思考

Application and Thoughts of Fresh Air System in Ultra-Low Energy Buildings in China

建筑气密性的不断提高,导致依靠室外渗透解决室内新风的传统模式不再适用,也带来了室内空气质量降低的问题,机械式新风系统成为超低能耗建筑的必要手段。同时新风系统的使用带入了新的能耗负荷,其中新风热回收技术的应用可以有效降低新风负荷,因此热交换效率指标成为了超低能耗建筑新风系统的重要能耗评价指标。通过检索全国各地超低能耗建筑相关标准,揭示了我国超低能耗建筑标准因出台区域、建筑属性、标准类别等差异导致了该类建筑中新风系统产品技术要求的差异化,并重点针对热交换效率指标对比了各地建筑标准、协会产品标准、国家产品标准的差异,总结了标准差异化导致产品差异化、验收差异化等问题,探讨了新风系统在超低能耗建筑中应用的问题及机遇。

With the continuous improvement of building air tightness,the traditional mode of relying on outdoor infiltration to solve indoor fresh air is no longer applicable,and also brings about a decrease in indoor air quality,mechanical fresh air systems have become a necessary means for ultra-low energy buildings.At the same time,the use of fresh air systems has brought new energy consumption load,and the application of fresh air heat exchange technology can effectively reduce the load of fresh air,therefore,the heat exchange efficiency has become an important energy consumption evaluation index for Fresh Air System of ultra-low energy buildings.The article,by searching for relevant standards for Ultra-Low Energy Building in China,reveals the differences in technical requirements for fresh air system products due to differences in regions,building attributes,and standard categories.It focuses on comparing the differences in heat exchange efficiency indicators between building standards,association product standards,and national product standards,summarizing the issues of product differentiation and acceptance differentiation caused by standard differentiation,and exploring the problems and opportunities of applying Fresh Air System in ultra-low energy buildings.