利用CFD技术研究太阳能烟囱内浮力气流

Proceedings of the International Conference on Energy and Sustainable Development: Issues and Strategies (ESD 2010) Pub Date : 2010-06-02 DOI:10.1109/ESD.2010.5598862

P. Somsila, U. Teeboonma, W. Seehanam

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引用次数: 17

摘要

太阳能烟囱是一种利用被动式太阳能加热的空气对流来改善建筑物自然通风的方法。由于密度随垂直方向的不同而产生气流。因此，本研究的目的是利用实验和计算流体力学(CFD)方法来研究太阳能烟囱的通风效率。在模拟中，采用了浮力模型和辐射传热模型来计算烟囱内的气流。研究了400 ~ 800 W/m2范围内热流密度和1 ~ 2 m太阳能烟囱高度对通风效率的影响。研究发现，随着热流密度的增加和烟囱高度的增加，通风效率和风量均有所提高。此外，CFD模拟结果与实验结果吻合较好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Investigation of buoyancy air flow inside solar chimney using CFD technique

A solar chimney is a way of improving the natural ventilation of buildings by using convection of air heated by passive solar energy. It results in air flows because of the difference of the density varied with vertical direction. Therefore, the objective of this study was to investigate the ventilation efficiency of solar chimney using experimental and computation fluid dynamics (CFD) methods. In the simulation, models of buoyancy force and radiation heat transfer were applied to compute air flow inside the chimney. The influence of heat flux in a range of 400–800 W/m2 and 1 to 2 m height of solar chimney on the ventilation efficiency was investigated. It was found that the ventilation efficiency and air flow rate are increased with increasing the heat flux and height of solar chimney. In addition, CFD simulation shows good agreement with experimental results.

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Proceedings of the International Conference on Energy and Sustainable Development: Issues and Strategies (ESD 2010)

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