改进的通风性能评价指标——实际新风换气次数  

Revised index for ventilation performance evaluation:number of real outdoor air exchanges

作　　者：罗志文[1] 赵加宁[1] 

机构地区：[1]哈尔滨工业大学人工环境科学与工程研究所,哈尔滨150090

出　　处：《哈尔滨工业大学学报》2007年第6期912-915,共4页Journal of Harbin Institute of Technology

基　　金：黑龙江省自然科学基金资助(E0210)

摘　　要：通过比较分析常用的几个通风性能评价指标,指出各自的优缺点及适用条件,并提出一种改进的通风性能评价指标——实际新风换气次数nROAC,即将新风换气次数集成到排污效率中,综合考虑了送入室内的新风的量和通风系统气流组织排除污染物的能力.最后将实际换气次数与排污效率进行了比较分析,证明了实际换气次数能更好地反映通风系统的空气环境性能.After comparing and analyzing the widely used indices of evaluating ventilation performance, the pros and cons of these indices are declared. It is proved by the experimental data that although the index of contaminant removal effectiveness （ ε ） can especially reveal the characteristics of contaminant distribution, it is not suitable for assessment of the contaminant removal efficiency of ventilation scenarios with different air flow rates. Indeed, its definition does not take into account absolute contaminant concentrations level. Accordingly, a newly revised index called number of real outdoor air changes （ n ROAC ） is proposed, which incorporates the number of fresh air changes into the index of contaminant removal effectiveness. It shows that n ROAC is a more effective indicator to reflect the contaminant concentration level and contaminant removal capacity in comparison with the previous contaminant removal effectiveness.

关 键 词：通风性能评价 气流组织 通风效率 换气效率 

分 类 号：TU831.3[建筑科学—供热、供燃气、通风及空调工程]