A CFD based approach for determining the optimum inclination angle of a roof-top solar chimney for building ventilation

被引：59

作者：

Kong, Jing ^{[1
]}

Niu, Jianlei ^{[1
]}

Lei, Chengwang ^{[1
]}

机构：

[1] Univ Sydney, Sch Civil Engn, Ctr Wind Waves & Water, Sydney, NSW 2006, Australia

来源：

SOLAR ENERGY | 2020年 / 198卷

基金：

澳大利亚研究理事会;

关键词：

Building ventilation; CFD; Solar chimney; NATURAL VENTILATION; INDUCED FLOW; AIR-FLOW; PERFORMANCE; COLLECTOR; WALL; PREDICTION; CONVECTION; RADIATION; HEIGHT;

D O I：

10.1016/j.solener.2020.01.017

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A CFD based procedure is described to identify the optimum inclination angle of a small-scale roof-top solar chimney for maximum ventilation performance. The absorber wall of the chimney under consideration is 500-mm long and the air gap width is 40 mm. Firstly, CFD simulations are performed on a two-dimensional solar chimney model with inclination angles varying from 30 degrees to 90 degrees relative to the horizontal plane under different heat fluxes. Subsequently, a mathematical procedure using the CFD data to estimate the ventilation performance of the solar chimney at different inclination angles under real climate conditions is described. The procedure accounts for the effect of the inclination angle on receivable solar irradiance and is applied to three Australian cities, corresponding to three different latitudes. It is found that the optimum inclination angle varies from 45 degrees to 60 degrees, depending on the latitude and season of operation.

引用

页码：555 / 569

页数：15

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