商业厨房通风、空调及热环境模拟研究

发布时间：2018-03-07 08:11

本文选题：商业厨房　切入点：室内热环境　出处：《沈阳建筑大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着我国餐饮业的不断发展,商业厨房环境日益受到人们的普遍关注。如果不能很好的设计运行厨房通风空调及排油烟系统,会对厨房内环境造成恶劣影响,烹饪所产生的大量余热、余湿和CO2、油烟等污染物不能及时排出会对人的舒适性和身体健康造成伤害。同时商业厨房内有着较多的大功率热源,室内温度高,同时存在很强的非对称辐射,操作区域受到炉火高温热辐射的侵害和热浮升力作用下油烟气的干扰,且烟气容易在室内的滞留,直接导致室内污染的加重。一个不舒适热湿环境必然会导致室内作业人员工作效率降低,最终会影响商用厨房的正常运作,商业厨房室内环境已成为餐饮业亟待解决的问题。现代商业厨房的热环境调节系统由以前单一的通风系统向多组分通风空调系统发展,对厨房内热环境调节能力更强,特别是对温度控制效果更加明显。基于现阶段国内外对商业厨房通风空调的研究,本文采用数值模拟手段对商用厨房室内环境里热舒适的影响因素和室内污染控制的影响因素进行比较析,得到一些关于商用厨房室内环境设计参数。这些参数涵盖送风系统参数(风口大小、送风温度、送风速度、送风位置)和排风系统参数(排风罩形式、排风罩设置高度、排风速度),这些参数的确定为实际工程设计提供了选择依据,具有一定的理论意义和工程应用价值。同时,本文还重点研究了置换通风方式在商业厨房的应用及置换通风的特点,并将相同送风速度下不同送风温度以及相同送风温度下不同送风速度作对比,得出一些一般性的结论。计算流体力学分析方法是国内外公认的室内气流组织设计和评价最简便的方法。目前应用较多的CFD商用软件有FLUENT, STAR-CD, PHOENICS等,它们的功能比较全面,适用性强,可以求解工程界中的各种复杂问题。其中FLUENT软件下的AIRPAK软件是专门面向HVAC领域的软件。AIRPAK具有强大的可视化后处理能力,能够生成速度矢量、云图和粒子流线动画,描绘气流的实时运动情况。模拟结束后,还可提供强大的数值报告,从而对房间的气流组织、热舒适性和室内空气品质(IAQ)进行全面综合评价。
[Abstract]:With the continuous development of catering industry in our country, the commercial kitchen environment has been paid more and more attention. If the kitchen ventilation and air conditioning system and fume exhaust system can not be designed and operated well, it will have a bad effect on the kitchen environment. The large amount of waste heat produced by cooking, waste moisture, CO _ 2, oil fumes and other pollutants that cannot be discharged in time will cause harm to people's comfort and health. At the same time, there are more high-power heat sources in commercial kitchens, and the indoor temperature is high. At the same time, there is strong asymmetric radiation, the operation area is affected by the high temperature heat radiation of the furnace fire and the oil fume is disturbed by the heat floating lift, and the smoke is easily trapped in the room. An uncomfortable hot and wet environment will inevitably lead to a decrease in the working efficiency of indoor workers, which will eventually affect the normal operation of commercial kitchens. Commercial kitchen indoor environment has become an urgent problem to be solved in the catering industry. The thermal environment regulation system of modern commercial kitchen has developed from a single ventilation system to a multi-component ventilation and air conditioning system, which has a stronger ability to regulate the thermal environment in the kitchen. In particular, the effect of temperature control is more obvious. Based on the current domestic and foreign research on commercial kitchen ventilation and air conditioning, In this paper, the influence factors of thermal comfort in commercial kitchen indoor environment and the influence factors of indoor pollution control are compared and analyzed by means of numerical simulation. Get some design parameters about the indoor environment of commercial kitchen. These parameters cover the air supply system parameters (air outlet size, air temperature, air supply speed, air supply position) and exhaust system parameters (exhaust cover form, exhaust cover setting height), The determination of these parameters provides a basis for the selection of practical engineering design, and has certain theoretical significance and engineering application value. This paper also focuses on the application of displacement ventilation in commercial kitchens and the characteristics of displacement ventilation, and compares the different air temperature at the same air supply speed and the different air supply velocity at the same air supply temperature. Some general conclusions are drawn. Computational fluid dynamics (CFD) analysis method is the most convenient method for the design and evaluation of indoor airflow organization at home and abroad. At present, the commercial software of CFD are fluent, STAR-CD, PHOENICS and so on, and their functions are relatively comprehensive. Because of its strong applicability, it can solve various complex problems in engineering. Among them, AIRPAK software under FLUENT software is a special software for HVAC domain. AIRPAK has a powerful ability to visualize post-processing, and can generate velocity vector, cloud diagram and particle flow line animation. After the simulation, a powerful numerical report can be provided to comprehensively evaluate the air distribution, thermal comfort and indoor air quality of the room.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU83

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