摘要
新风热回收作为降低建筑能耗的手段,对助力建筑业实现碳达峰、碳中和具有潜在作用。本文选取不同气候区的7个典型城市,对比分析各气候区典型建筑使用新风全热/显热回收系统的节能性和经济性。分析过程使用全年逐时动态法计算热回收系统的节能量,计算过程综合考虑风机能耗增量确定了热回收装置的节能开启条件,并考虑了热回收系统低温工况易结霜问题对节能效果的影响,为热回收装置节能量计算提供了一种相对准确的方法。分析结果显示,寒冷、夏热冬冷、夏热冬暖及较湿润的严寒地区使用全热回收相对更具节能和经济性,较干燥的严寒地区和温和地区采用显热回收则相对更具经济性,但温和地区采用热回收系统的投资回收期在5 a以上,不适合全面推广。分析结论为新风热回收系统在我国的推广提供了一定参考。
As a method to reduce building energy consumption,heat recovery ventilation system plays a potential role in achieving carbon peak and carbon neutrality of building operation.In this paper,typical cities in different climate zones were selected to compare and analyze the energy saving and economic performance of total/sensible heat recovery system.The annual hourly dynamic calculation method was used to analyze the energy saving of heat recovery ventilation system.During the analysis,the energy-saving start-up conditions of the heat recovery systems were determined while considering the influence of fan energy consumption,as well as the frosting problem of heat recovery systems at low temperature,which provided a relatively accurate method for the energy saving calculation of heat recovery ventilation system.The results show that total heat recovery can achieve high energy saving and economic advantages in cold regions,hot summer and cold winter regions,hot summer and warm winter regions,and humid severe cold regions.Sensible heat recovery is more economical in dry severe cold regions and mild regions.However,the payback period of heat recovery system in mild regions is more than five years,which indicates it is not suitable for comprehensive promotion in such climate.The conclusions of this paper provide reference for the promotion of ventilation heat recovery system in China.
作者
张文
聂金哲
ZHANG Wen;NIE Jinzhe(Beijing University of Civil Engineering and Architecture,Beijing Key Laboratory of Heating,Gas Supply,Ventilation and Air Conditioning Engineering,Beijing 100044,China)
出处
《建筑科学》
CSCD
北大核心
2022年第8期194-200,共7页
Building Science
基金
北京建筑大学金字塔人才培养工程(JDJQ20200303)
国家自然科学基金青年科学基金项目“金属有机骨架材料空气净化除湿机理及其在固体除湿净化空调系统应用研究”(51708013)。
关键词
新风热回收
碳排放
近零能耗建筑
适用性
建筑节能
ventilation heat recovery
carbon emissions
nearly zero energy buildings
applicability
building energy-saving
