Modeling natural convection in a pitched thermosyphon system in building roofs and experimental validation using particle image velocimetry

被引：26

作者：

Chami, N. ^{[1
]}

Zoughaib, A. ^{[1
]}

机构：

[1] Ecole Mines Paris, CEP, Paris, France

来源：

ENERGY AND BUILDINGS | 2010年 / 42卷 / 08期

关键词：

PIV; Pitched thermosyphon; CFD; Heat transfer; Natural convection; Roof systems; HEATED VERTICAL CHANNEL; SOLAR CHIMNEY; AIR-FLOW; TROMBE WALLS; VENTILATION; EFFICIENCY; FLUX;

D O I：

10.1016/j.enbuild.2010.02.019

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Attics in Europe are more and more used as a living room. In tropical regions, summer comfort in attics becomes critical when the roof system is badly designed. The European standards advise to form an open thermosyphon system into the roof under the tiles for many purposes. In order to evaluate the air channel's efficiency, an experimental study using a 2D-PIV system was carried out. A numerical model representing the natural convection within the thermosyphon was also developed. The predicted velocity distributions and the induced mass flow rate were in good agreement with the experimental results. Correlations for the air flow rate and heat transfer coefficients were proposed. The impact of the inclination, height, opening sections and Rayleigh number on the channel's efficiency was also investigated. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1267 / 1274

页数：8

共 35 条

[31] Ventilated-solar roof air flow and heat transfer investigation [J].