置换通风的通风效率及其微热环境评价  

Displacement ventilation effectiveness and evaluation of the micro thermal environment

作　　者：马仁民[1] 

机构地区：[1]西安建筑科技大学

出　　处：《暖通空调》1997年第4期1-6,65,共7页Heating Ventilating & Air Conditioning

摘　　要：讨论了通风有效性与空气分布特性的相关性，分析了混合通风（上送下回）通风效率低于置换通风效率的原因。根据大量的实验资料，分析提出了影响通风效率的若干复合因素，得出了预测置换通风效率的经验式。经综合人体舒适性实验，说明置换通风微热环境能提供居住者整体舒适感，而在肢体下部风感不满意率小于１５％。Discusses correlations between ventilation effectiveness and air distribution, analyses why the ventilation efficiency of mixing ventilation is lower than that of displacement ventilation. Based on experimental data, puts forward a series of compound factors influencing ventilation effectiveness, and develops empirical formulas for predicting the ventilation efficiency. A combined test shows that displacement ventilation can offer satisfactory comfort conditions for the whole body of occupants and the PPD value due to feeling draft at the lower part of human body is less than 15 per cent.

关 键 词：混合通风 置换通风 通风效率 室内环境 空调系统 

分 类 号：TU834.5[建筑科学—供热、供燃气、通风及空调工程] TU831.3