居住建筑厨房补风方式及节能研究

发布时间：2018-01-19 18:57

本文关键词： 建筑厨房补风方式气流组织数值模拟节能分析　出处：《沈阳建筑大学》2013年硕士论文　论文类型：学位论文

【摘要】：随着近年来经济改革的深入,人们的生活质量不断提高,对身体的健康和生活品质的要求也越来越高,身体健康不仅仅限于没有疾病的困扰,更广泛的表示健康没有受到威胁。室内空气品质与其均有联系,所以受到了广泛的关注。厨房对于人们的生活必不可少,在烹饪的过程中所产生的污染物和废热严重影响着室内的环境。单独采用油烟机排风时,在室内外压差的作用下,需要向厨房内补充气体,由于季节气候自然通风受到限制。在门窗关闭的情况下,由门窗的缝隙向厨房内补风,补充的风量很大。导致气流组织不合理,使室内环境受到污染甚至二次污染。本文利用CFD——luent软件对居住建筑厨房内设置单独的补风口,在不同的工况下进行模拟研究。室内空气流动为湍流,采用结构型网格和非结构型网格的结合应用的网格划分方法,污染物的设定采用的是空气与碳氧化合物的组合,选用压力基求解器求解控制方程。本课题探讨在操作台上，灶台四周(抽油烟机的正下方)增设条缝型补风口对厨房进行补风。运用CFD——luent模拟软件对居住建筑厨房是否增设补风口状态下的气流组织进行模拟分析,得出在不同工况状态,厨房内的速度分布、温度分布、污染物浓度分布的模拟态势,分析得到较理想的工况。运用实验的方法,对某一用户的厨房进行测试,得到一些真实有效的数据，，分析推断出各参数的变化趋势。利用测得数据与模拟结果对比分析,望得到真实地、有效地、具有普遍性的结果。在建筑中增设补风风道,在不占用太多建筑面积的前提下,厨房增设补风口后,不但油烟机的排烟效果可以得到提升,而且公共排烟道可以从原设计的面积为0.24m2,减小至0.215m。。补风风道的面积为0.129m2。在建筑中只增加了0.104m2的补风风道。效果却大大的不同。经研究发现,在灶台的四周设置补风口,对厨房进行补风,能提供在油烟机工作时,厨房所需补充的风量及时的补风,减少了门窗缝隙的渗透量,间接地减少内耗,达到节能的目的。另外,从室外引进新鲜空气,提供了燃烧时所需要的氧气,促进了燃烧。在锅口处形成了垂直向上的空气幕,控制污染物的扩散,提高油烟机的排烟效率。对厨房内污染物的防治和合理的气流组织研究具有指导意义。
[Abstract]:With the deepening of economic reform in recent years, the quality of life of people is constantly improving, and the requirements of health and quality of life are becoming higher and higher. Physical health is not limited to the absence of disease. More broadly, health is not threatened. Indoor air quality is linked to it, so it has received widespread attention. Kitchens are essential to people's lives. In the cooking process of pollutants and waste heat seriously affect the indoor environment. The use of fume machine exhaust air, in the indoor and outdoor pressure difference, need to supply gas to the kitchen. Natural ventilation is restricted by seasonal climate. When doors and windows are closed, the gap between the doors and windows is used to replenish the air in the kitchen, and the amount of additional air is very large, which results in unreasonable airflow organization. Make indoor environment be polluted even secondary pollution. In this paper, CFD--luent software is used to set up a separate air supply outlet in the kitchen of residential building, and the simulation study is carried out under different working conditions. The indoor air flow is turbulent. In this paper, the combination of structured grid and non-structural grid is used to solve the problem. The air and carboxylic compounds are combined to set the pollutant, and the pressure base solver is used to solve the governing equation. This topic is discussed on the platform. Around the stove (directly below the range hood). The CFD--luent simulation software is used to simulate the airflow organization in the residential building kitchen. The simulation situation of the velocity distribution, temperature distribution and pollutant concentration distribution in the kitchen under different working conditions was obtained. The ideal working conditions were analyzed and the kitchen of a certain user was tested by the method of experiment. Some real and effective data are obtained, and the variation trend of each parameter is analyzed and inferred. By comparing the measured data with the simulation results, we hope to get the true, effective and universal results. In addition in the building air supply duct, in the premise of not occupying too much building area, the kitchen after the addition of tuyere, not only the smoke exhaust effect can be improved. And the public flue can be designed from the original area of 0.24m2. The area of the air supply duct is 0.129 m ~ 2. Only 0.104 m ~ 2 is added to the building, but the effect is very different. Through the study, it is found that the installation of a supplementary air vent around the stove can provide a timely supply of air in the kitchen when the fume machine is working, thus reducing the infiltration of the gap between the doors and windows. Indirectly reduce internal friction to achieve the purpose of energy saving. In addition, the introduction of fresh air from the outside provides the oxygen needed for combustion and promotes combustion. A vertical upward air curtain is formed at the orifice of the pan. It is of great significance to control the diffusion of pollutants and improve the efficiency of soot exhaust, which is of great significance to the prevention and control of pollutants in kitchen and the study of reasonable airflow organization.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU834

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