...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Science and Technology for the Built Environment >Influences of radiation on the prediction of thermal environment in a transient buoyancy-driven natural ventilation classroom
【24h】

Influences of radiation on the prediction of thermal environment in a transient buoyancy-driven natural ventilation classroom

机译：辐射对瞬态浮力驱动的自然通风教室中热环境预测的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Computational fluid dynamics (CFD) simulations are performed to reveal the significant effects of radiation on predictive accuracy of thermal environment in a transient buoyancy-driven natural ventilation classroom. The present numerical method is verified by the experimental results. The time evolutions of airflow field, radiation heat flux, buoyancy force, and airflow rate are analyzed in detail. In addition, the effects of radiation on thermal comfort are evaluated by three different indices. It is found that radiation plays a critical role in the establishment of the indoor thermal environment. The proportion of radiation heat flux increases with the effective radiation area but decreases with the power of the occupants. Finally, the indoor space can be divided into five different occupied zones depending on how much radiated heat the occupants emit. Radiation can change the indoor heat flux distribution, directly leading to a smaller buoyancy force and ventilation rate. As a result, the thermal comfort except for any draft is linearly affected by both the power and the effective radiation area, and the greater the proportion of radiation heat flux is, the better the indoor thermal comfort is. These conclusions demonstrate that radiation has a noticeable impact on the dynamic evaluations of indoor thermal environment.
机译：进行计算流体动力学（CFD）模拟，以揭示辐射对瞬态浮力驱动的自然通风课堂中热环境预测精度的显着影响。通过实验结果验证了本数值方法。详细分析了气流场，辐射热通量，浮力力和气流率的时间演变。此外，辐射对热舒适性的影响由三种不同的指数评估。发现辐射在室内热环境的建立中起着关键作用。辐射热通量的比例随着有效辐射区域而增加，但随着乘员的功率而降低。最后，根据乘员发出的辐射热量，室内空间可以分为五个不同的占用区。辐射可以改变室内热通量分布，直接导致较小的浮力力和通风率。结果，除了任何草案外的热舒适性是通过功率和有效辐射区域的线性影响，辐射热通量比例越大，室内热舒适性越好。这些结论表明，辐射对室内热环境的动态评估具有显着影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号