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Initial Buoyancy Reduction in Exhausting Smoke With Solar Chimney Design

机译：通过太阳能烟囱设计减少烟气中的浮力

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摘要

A possible problem in using solar chimney as a natural smoke exhaust system will be identified in this paper. Smoke generated in a fire might not be removed effectively if the glazing walls are heated up due to exposure to solar radiation. It is because the buoyancy of the smoke is reduced initially in the solar chimney. This phenomenon of reducing buoyancy will be discussed. A simple equation of motion on smoke movement was set up. Some of the results of full-scale burning experiments carried out earlier for assessing the fire response of a glass facade system were applied to support the argument. Experiments indicated that smoke would take a longer time to move up when the glazing wall temperature is higher. A better smoke exhaust design accounting the reduction in buoyancy at this early stage of a fire should be worked out.
机译：在本文中将发现使用太阳能烟囱作为自然排烟系统的可能问题。如果玻璃墙由于暴露在太阳辐射下而变热，则可能无法有效清除火灾中产生的烟雾。这是因为最初在太阳能烟囱中烟雾的浮力降低了。将讨论这种减少浮力的现象。建立了一个关于烟雾运动的简单运动方程。早先进行的用于评估玻璃幕墙系统的火灾响应的全面燃烧实验的一些结果被用于支持该论点。实验表明，当玻璃墙温度较高时，烟雾向上移动需要更长的时间。应该设计出一种更好的排烟设计，考虑到火灾初期浮力的降低。

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  • 来源
    《Journal of Heat Transfer》 |2010年第1期|014502.1-014502.3|共3页
  • 作者

    C. L. Chow; W. K. Chow;

  • 作者单位

    Department of Architecture, Wolfson College, University of Cambridge, Cambridge, UK;

    Department of Building Services Engineering, Research Centre for Fire Engineering, The Hong Kong Polytechnic University, Hung Horn, Kowloon, Hong Kong, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    full-scale burning tests; glass solar chimney; buoyancy; smoke exhaust;

    机译：全面燃烧测试;玻璃太阳能烟囱浮力;排烟;

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