多通道太阳能烟囱的通风性能

Ventilation performance of multi-channel solar chimney

提出在竖直式太阳能烟囱中内置半圆柱形吸热墙的多通道太阳烟囱结构形式,并通过数值模拟对其通风特性进行研究.分析竖直式太阳能烟囱优化结构在不同的通道宽度W、墙体高度H、半圆柱吸热墙半径R下通风量的变化,并对优化与传统的结构形式的通风量进行对比.结果表明:在内置吸热墙半径为60、75、100、150mm,热流密度为100~1 000 W/m^2的范围内,设置半圆柱形吸热墙的多通道太阳能烟囱通风量比传统的结构增长了16%~32%.

A vertical multi-channel solar chimney with inner-positioned semicylindric endothermic wall was put forward and its ventilation characteristics was studied with numerical simulation. The variation of ventilation of the optimized structure with channel width W, endothermic wall height H, and radius of en- dothermie wall R was analyzed and the ventilation was compared between optimized and traditional solar chimney structure. The result shows that when the radius of the endothermic wall is 60 mm, 75 mm, 100 mm, and 150 mm, respectively, and the heat flux is inthe range of from 100 W/m2 to 1 000 W/m2, the ventilation of solar chimney with semicylindric endothermic wall will be increased by 16%- 32% more than that of traditional structure.