Numerical study on the natural ventilation in winter under different wall boundary conditions

被引：0
|
作者：
Wang Y. [1 ,2 ]
Sun P. [1 ]
Hu W. [1 ]
Wang J. [1 ]
机构：
[1] School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou
[2] Key Laboratory of Railway Vehicle Thermal Engineering, Ministry of Education of China, Lanzhou Jiaotong University, Lanzhou
来源：
Harbin Gongcheng Daxue Xuebao | / 11卷 / 1606-1612期
关键词：
Floor heating; Indoor air quality; Natural ventilation; Numerical simulation; Thermal boundary condition; Unsteady heat transfer; Ventilation efficiency;
D O I：
10.11990/jheu.201509036
中图分类号：
学科分类号：
摘要：
To study the influence of thermal boundary conditions of building envelope on the numerical results of natural ventilation in winter, the boundary conditions of the uniform heat flux and the uniform wall temperature are applied for the surrounding structure of a residence applying floor heating in a region of Lanzhou. The realizable k-ε turbulent model in the FLUENT software is adopted to numerically analyze the natural ventilation and the pollutant concentration field. The results show that the ventilation time is barely affected by the wall boundary conditions under the same window-opened situation. However, the numerical results of the ventilation efficiency and the indoor pollutant profile are significantly affected by the wall boundary conditions. The predicted mean vote (PMV) value of the uniform wall temperature for the same window situation and a different inlet air temperature is lower than that of the uniform heat flux. Moreover, the influence of the wall boundary condition on the PMV value is more significant for the inlet air with a higher temperature. © 2016, Editorial Department of Journal of HEU. All right reserved.
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页码：1606 / 1612
页数：6
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