摘要
近零能耗建筑对气密性有较高要求,良好的气密性可以降低无组织渗风导致的冷、热负荷,避免湿气侵入造成的建筑发霉、结露和损坏,减少室外不良因素对室内环境的影响。目前,我国对夏热冬暖地区近零能耗建筑气密性要求尚不明确。本文以夏热冬暖地区典型近零能耗居住建筑为研究对象,确定了建筑气密性(50 Pa)与常压下空气渗透换气次数的转换方法,计算了得到不同气密性等级对应的年平均空气渗透换气次数(常压)。并在TRNSYS能耗模拟平台建立了典型建筑模型,模拟计算了气密性对近零能耗居住建筑室内热湿环境和空调通风能耗的影响。最后以营造更加节能和热湿舒适的室内环境为目标,建议自然通风策略下建筑气密性N50≤3.0 h^-1,机械通风策略下建筑气密性N50≤1.0 h^-1。
Nearly zero energy buildings require high air tightness. Good air tightness can reduce the demand for cooling and heating load caused by uncontrolled ventilation,avoid building mildew,condensation and damage caused by moisture intrusion,and reduce the impact of outdoor adverse factors on the indoor environment. The airtightness requirement of nearly zero energy buildings in hot summer and warm winter areas is still unclear. Taking a typical nearly zero energy residential building in a hot summer and warm winter area as the research object,we calculated the average infiltration air change rate( normal pressure) corresponding to different air tightness levels( 50 Pa). This paper studies the influence of different building air tightness on the indoor thermal environment,humidity environment and energy consumption of air conditioning and ventilation through TRNSYS simulation calculation. Aiming at creating a thermal-moisture comfort and energy-saving indoor environment,we recommend air tightness N50≤ 3. 0 h^-1 under natural ventilation strategy and N50≤ 1. 0 h^-1 under mechanical ventilation strategy for nearly zero energy residential buildings in hot summer and warm winter regions.
作者
路菲
余镇雨
邹瑜
徐伟
孙德宇
刘常平
LU Fei;YU Zhenyu;ZOU Yu;XU Wei;SUN Deyu;LIU Changping(China Academy of Building Research,Institute of Building Energy and Efficiency,Beijing 100013,China;Tsinghua University,Department of Building Science,Beijing 100084,China)
出处
《建筑科学》
CSCD
北大核心
2019年第10期36-42,共7页
Building Science
基金
“十三五”国家重点研发计划项目“近零能耗建筑技术体系及关键技术开发”(2017YFC0702600)
关键词
夏热冬暖地区
近零能耗居住建筑
气密性
室内热环境
建筑节能
hot summer and warm winter region
nearly zero energy residential building
air tightness
indoor thermal environment
building energy efficiency
