严寒地区住区在冬季采暖期期间空气中的PM2.5浓度由于采暖而导致剧增。

Cold regions settlements PM2.5 concentrations in the air during the heating period in the winter due to heating resulting from surge. Residential space form for research purposes Effect of diffusion of PM2.5, Harbin herein are by way of example, a typical residential PM2.5 concentration field is employed to explore field testing and CFD simulation methods. <br><br>The results showed that, on impact PM2.5 concentration and concentration distributions settlements by the temperature, relative humidity, and spatial form. <br><br>PM2.5 concentration and temperature showed a significant negative correlation, the relative humidity was a significant positive correlation, and the relative humidity increases, the stronger positive correlation; <br>in Weiheshi settlements, courtyard openings disposed in opposite directions and offset axis and an aspect ratio of compound 1: 1.5 to form settlements are not conducive to diffusion PM2.5; <br>in settlements determinant, wind angle more conducive PM2.5 diffusion, and vertically staggered arrangement in most wind directions are detrimental to the proliferation of PM2.5. <br>[Key words] cold regions; residential space; PM2.5 proliferation; winter heating period

严寒地区住区在冬季采暖期期间空气中的PM2.5浓度由于采暖而导致剧增。出于研究住区空间形态对PM2.5扩散的影响之目的，哈尔滨市被在本文中作为示例，典型住区的PM2.5浓度场被采用实地测试和CFD模拟的方法进行探究。<br><br>结果表明，影响由住区中温度、相对湿度以及空间形态对PM2.5浓度变化及浓度场分布产生。<br><br>PM2.5浓度与温度显示显著的负相关性，与相对湿度呈显著的正相关性，且相对湿度越大，正相关性越强；<br>在围合式住区中，院落开口按相对方向设置且偏离中轴线以及院落长宽比为1：1.5的住区形态均不利于PM2.5扩散；<br>而在行列式住区中，风向角越大越有利于PM2.5扩散，而竖向错列的排列方式在大多数的风向角下均对PM2.5的扩散不利。<br>[关键词]严寒地区；住区空间；PM2.5扩散；冬季采暖期

The concentration of PM2.5 in the air of residential areas in severe cold area during the winter heating period is increased sharply due to heating. For the purpose of studying the influence of residential space form on PM2.5 diffusion, Harbin city is taken as an example in this paper. The PM2.5 concentration field of typical residential areas is explored by field test and CFD simulation.<br>The results show that the influence of temperature, relative humidity and spatial form on PM2.5 concentration changes and concentration field distribution.<br>PM2.5 showed a significant negative correlation with temperature and a significant positive correlation with relative humidity, and the greater the relative humidity, the stronger the positive correlation;<br>In the enclosed residential area, the residential area with courtyard opening set in relative direction and deviated from the central axis and courtyard length width ratio of 1:1.5 is not conducive to PM2.5 diffusion;<br>In the determinant residential area, the larger the wind angle is, the more favorable the PM2.5 diffusion is, while the vertical staggered arrangement is unfavorable to the PM2.5 diffusion in most wind angles.<br>[Key words] severe cold area; residential space; PM2.5 diffusion; winter heating period<br>