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首页> 外文会议>PALENC(Passive and Low Energy Cooling) Conference on Building Low Energy Cooling and Advanced Ventilation Technologies in the 21st Century;AIVC(Air Infiltration and Ventilation Centre) Conference on Building Low Energy Cooling and Advanced Ventilation Technologies in the 21st Century >Computational analysis of indoor air circulation and heat transfer in a house ventilated by wind-catch
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Computational analysis of indoor air circulation and heat transfer in a house ventilated by wind-catch

机译：风挡通风的房屋室内空气循环和传热的计算分析

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Considering that natural ventilation is a climatic factor, a renewable alternative, as well as an important source of comfort, it seems to be relevant to consider its great potential when applied to architecture, taking into account economical and environmental gains. It is difficult to think about studying air circulation without mentioning the north Africa vernacular architecture and its ability to create the best solutions to increase the ventilation without any energy consumption, therefore, adopting passive cooling. According to Hassan Fathy (1986) - an Egyptian architect who developed a collection of fruitful works using natural ventilation and local materials - in that region, ventilation, light and view could not be associated at the same time to a single window because each function demands a different window configuration. Criative systems of passive cooling appeared in these areas and among them the wind-catch or malqaf can be distinguished. It was created to improve ventilation requirements catching wind from high above, where the air is cooler, stronger and with less sand and other particles, and channeling it down into the building. In agreement with Fathy. another advantage of the malqaf is the possibility of solving the problem of screening that is the consequence of building settlements in a ordinary town plan. In Egypt the malqaf is very developed and its first usage dates back to ancient historical periods. In this work, based on the writings of Fathy (1986) we analyse numerically one case in which wind-catch is used. It is the Qa'a of Muhib AdDin Ash-Shafi Al-Muwaqqi. known as Othman Katkhuda, in Cairo, dated from the fourteenth century A.D. presented in Fathy's book, (Fathy 1986).The analyses start by solving the air circulation problems to determine the wind fields, using a mixed stabilised finite element method applied to the full Navier-Stokes equations. With these wind fields, the heat transfer problem is solved and analysed. Numerical results are compared with the studies presented by Fathy (1986). The results obtained suggest the capacity of cooling the indoor air by improving the ventilation with a reasonable arrangement of openings only.
机译：考虑到自然通风是气候因素，可再生替代能源以及重要的舒适来源，考虑到经济和环境收益，考虑将其应用于建筑时考虑其巨大潜力似乎很重要。在不提及北非民俗建筑及其创建最佳解决方案以增加通风而又不消耗任何能源的能力的情况下，很难考虑研究空气循环，因此采用被动冷却。根据哈桑·法西（Hassan Fathy，1986年）的说法-一位埃及建筑师使用自然通风和当地材料开发了一系列卓有成效的作品-在该地区，通风，光线和视野不能同时关联到单个窗口，因为每种功能都需要不同的窗口配置。在这些区域中出现了关键的被动冷却系统，其中可以区分风向或马尔卡夫风。它的创建是为了提高通风要求，以从高处捕获风，在高处，空气更凉爽，更强，沙子和其他颗粒更少，并将其向下引导到建筑物中。与Fathy达成协议。 malqaf的另一个优点是可以解决筛查问题的可能性，而筛查问题是在普通城镇规划中建造定居点的结果。在埃及，malqaf非常发达，其首次使用可追溯到古代历史时期。在这项工作中，根据Fathy（1986）的著作，我们从数值上分析了使用防风罩的一种情况。它是Muhib AdDin Ash-Shafi Al-Muwaqqi的基地。在开罗被称为奥斯曼·卡特胡达（Othman Katkhuda），其历史可追溯到费西（Fathy 1986）所著的公元14世纪。 这些分析首先通过应用到完整的Navier-Stokes方程的混合稳定有限元方法来解决空气循环问题以确定风场。利用这些风场，可以解决和分析传热问题。将数值结果与Fathy（1986）提出的研究进行了比较。所获得的结果表明，仅通过合理地布置开孔，就可以通过改善通风来冷却室内空气。

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