置换通风的发展及研究现状

基于置换通风舒适、健康和节能的显著特点，本文回顾了置换通风的发展历程，从室内空气品质和节能等方面阐述了国内外置换通风的研究现状。气流组织、热舒适性和污染物分布是影响置换通风室内空气品质的主要因素，因而论文主要从置换通风的两个显著特性：热力分层和垂直温度梯度的角度讨论了室内热舒适性影响因素和研究现状，从颗粒和气体污染物的分布情况论述污染物对室内空气品质的影响，根据置换通风的气流特性，提出可以把室内污染物分为热源和冷源污染物进行研究；最后简要介绍了置换通风节能的情况和优势。

Development and Status of the Displacement Ventilation

Based on the notable characters of comfort, health and energy saving, the development of displacement ventilation is reviewed in this paper. The research status quo of displacement ventilation at home and abroad is expatiated from the aspects of IAQ and energy saving etc. The airflow organization, thermal comfort and contamination distribution are the three important factors that affect the IAQ of displacement ventilation. So the influence factors and research status quo of the thermal comfort are discussed from two characters which are heat lamination and temperature gradient of displacement ventilation. Based on the indoor distribution of particles and gas contamination, the research of contamination is dissertated. According to the character of the airflow in displacement ventilation room, it is pointed out that the indoor contamination could be divided into two aspects which are heat source and cold source contamination. Finally, the status and advantages of energy saving are briefly introduced.