摘要
通风模式对室内环境品质及建筑运行能耗均有重要影响。文章在采用非稳定传热方法得到建筑围护结构热边界条件的基础上,对比研究了寒冷地区某办公室分别采用置换通风和层式通风的通风效果和节能特性。结果表明:在保证舒适性的前提下,研究对象采用置换通风的送风温度范围为13.0~27.0℃,采用层式通风的送风温度范围为19.0~24.0℃。采用实时调整送风温度的措施可以使置换通风中处理送风的机械制冷量日平均节约率达到2.87%,使层式通风中处理送风的机械制冷量日平均节约率达到5.16%,与基准送风温度对应的送风量相比,两种通风模式下的送风量均有所下降,其风量节约率可分别达到22.65%和32.14%。置换通风的室内温度更接近舒适,两种通风模式下室内污染物浓度均未超标。
Ventilation mode has important effect on indoor environmental quality and building operation energy consumption. Based on the unsteady heat transfer method, the thermal boundary conditions of building envelope are obtained. The ventilation effect and energy-saving characteristics of displacement ventilation and stratum ventilation in an office in cold zone are compared when the building envelope thermal properties meet the requirement of 65% energy saving. The results show that under the premise of thermal comfort, the air supply temperature range of displacement ventilation is 13.0-27.0 ℃ while that of stratum ventilation is 19.0-24.0 ℃. By changing the air supply temperature at different time, the daily average saving rate of mechanical refrigeration capacity of displacement ventilation and that of stratum ventilation can reach 2.87% and 5.16% respectively for fresh air treatment. And the indoor temperature of the displacement ventilation is more comfortable. The air supply volume under both ventilation modes decreases greatly compared with that corresponding to the basis air supply temperature, and the air supply saving rate is up to 22.65% and 32.14%, respectively. The indoor pollutant concentration under both ventilation modes is below the standard value. The research has important engineering guiding significance for further exploring the correlation between climatic conditions and ventilation modes, optimizing the design and operation management of air-conditioning systems.
作者
王烨
白玉洁
闫若文
WANG Ye;BAI Yujie;YAN Ruowen(School of Environmental and Municipal Engineering,Ministry of Education of China,Lanzhou Jiaotong University,Lanzhou730070,P.R.China;Key Laboratory of Railway Vehicle Thermal Engineering,Ministry of Education of China,Lanzhou Jiaotong University,Lanzhou730070,P.R.China)
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第5期40-49,共10页
Journal of Chongqing University
基金
国家自然科学基金资助项目(51476073,51266004)
甘肃省建设科技攻关资助项目(JK2016-2)。
关键词
置换通风
层式通风
节能特性
室内空气品质
舒适性
displacement ventilation
stratum ventilation
energy saving characteristics
indoor air quality
thermal comfort
