透明插板对太阳能烟囱通风的增强效应  

Enhancing solar chimney ventilation efficiency by insertion of transparent panel

作　　者：何国青[1] 吕达 HE Guo-qing;LV Da(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学建筑工程学院,浙江杭州310058

出　　处：《浙江大学学报（工学版）》2021年第12期2260-2266,共7页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(51678518).

摘　　要：为了提高太阳能烟囱的热效率,通过在烟囱内部增设构件,探究增加热边界层数量对烟囱通风的增强效应.在高1.2 m宽0.4 m深0.5 m的太阳能烟囱实验模型中,插入玻璃板,通过测量烟囱入口段流速的变化,研究透明插板对太阳能烟囱通风量的提高效果.实验在相对封闭的大厅中进行,并在烟囱入口处布置挡风板以排除环境风速的干扰.从10月到12月间,共获得7组实际太阳辐射下烟囱的通风量,包括内部有无插板的对比实验.结果表明,烟囱流量主要与吸热板的得热量有关.在太阳辐射强度几乎不变的情况下,插入1块普通玻璃板可使得烟囱通风量增加5%~9%.实验结果证实,在烟囱通道内增加热边界层可以提高烟囱热效率.To enhance the thermal efficiency of solar chimneys,this work was conducted to investigate the enhancing effect of adding thermal boundary layers on the ventilation efficiency by inserting a glazing panel in the chimney channel.A 1.2 m tall,0.4 m wide and 0.5 m deep solar chimney laboratory model was constructed.The ventilation enhancement was studied by comparing the stack flow rate before and after the insertion of a glazing panel in the chimney channel.The experiment was conducted in a relatively closed hall.The ambient wind influence was minimized with the use of a wind shield in front of the chimney inlet.Totally 7 tests were conducted and the ventilation flow was measured.The results showed that the flow rate was mainly affected by the heat absorbed by the absorbing plate.With the solar radiation almost same,the insertion of a common glazing panel in the chimney channel increased the stack flow rate by 5%to 9%.The results confirm that increasing the number thermal boundary layers is beneficial to the thermal efficiency of the chimney.

关 键 词：太阳能烟囱 热边界层 透明插板 太阳辐射 通风量 

分 类 号：TU18[建筑科学—建筑理论]