制面车间空调系统设计及通风系统模拟优化

发布时间：2019-03-12 12:12

【摘要】：随着人民生活水平的提高和工业生产的发展，大空间建筑愈来愈多，如各种音乐厅，体育馆，歌剧院，篮球馆等。随着我国制造加工业的迅猛发展，各类工业厂房等大空间建筑也大量涌现，使用空调系统的大空间建筑也愈来愈普遍。对于现代的工艺车间，不但要满足工艺方面的要求，而且还要营造良好的室内人工环境，空气调节是实现和保障这些工艺条件和环境的最佳手段。气流组织是空气调节的一个重要环节，它直接影响室内的空调效果，是关系到房间工作区的温湿度基数、精度及区域温差、工作区的气流速度及清洁程度和人们舒适感觉的重要因素，是一切空调工程设计中必须考虑和重视的问题。而送风参数和送回风口高度是影响室内气流组织的重要因素，所以研究不同送风参数和回风口高度对室内气流尤其是工作区气流的影响具有及其重要的意义。随着计算机硬件和软件技术的发展和数值模拟计算方法的日趋成熟，出现了基于现有流体力学的商用CFD软件。使得应用CFD技术模拟高大空间空调系统变成可能。空气处理单元机组结合加湿设备能满足大空间对温湿度的要求，并且能使室内具有良好的热舒适性。本文首先介绍了流体软件CFD及数学理论知识，在理论上验证了研究方法的可行性。以某大型食品生产车间制面车间的车间前段为研究对象，，首先对车间的空调系统进行设计，车间主要采用六台空气处理单元机组循环送风。其次，利用CFD软件，对厂房建立物理模型，设立边界条件，通过对不同工况下室内温度场，速度场的数值模拟，分析不同工况下的气流组织形式，通过空气分布特性指标对所选气流组织方式热舒适性进行评价。比较并分析其评价结果，得出最佳送风形式和类似的大空间车间的空调设计规律。本文通过对不同送风速度3.1m/s、5m/s、6m/s，不同送风角度10°、20°、30°和不同送风高度6m、8m，之间叠加的12种工况进行分析，得出送风速度6m/s,夹角30°工况室内温度场，速度场的分布最均匀，气流组织状况最好。
[Abstract]:With the improvement of people's living standards and the development of industrial production, there are more and more large space buildings, such as concert halls, gymnasiums, opera houses, basketball halls and so on. With the rapid development of manufacturing and processing industry in China, a large number of large-space buildings, such as industrial buildings, have emerged, and large-space buildings using air-conditioning systems have become more and more common. For the modern craft workshop, it is necessary not only to meet the requirements of the process, but also to create a good indoor artificial environment. Air conditioning is the best means to realize and guarantee these process conditions and environment. Air distribution is an important part of air conditioning, which directly affects the indoor air conditioning effect and is related to the temperature and humidity base, precision and regional temperature difference of the working area of the room. The air velocity and cleanliness of the working area and the important factors of people's comfort are the important problems that must be considered and paid attention to in all air conditioning engineering design. The parameters of the air supply and the height of the return air outlet are the important factors affecting the indoor air flow distribution, so it is of great significance to study the influence of the different air supply parameters and the height of the return air outlet on the indoor air flow, especially the air flow in the working area. With the development of computer hardware and software technology and the maturity of numerical simulation methods, commercial CFD software based on fluid dynamics has emerged. It is possible to use CFD technology to simulate the large space air conditioning system. Air treatment unit combined with humidification equipment can meet the requirements of temperature and humidity in large space, and can make indoor thermal comfort. In this paper, the fluid software CFD and mathematical theory are introduced, and the feasibility of the research method is verified in theory. Taking the front section of a large-scale food production workshop as the research object, the air conditioning system of the workshop is designed firstly. Six air treatment unit units are mainly used for circulating air supply in the workshop. Secondly, by using CFD software, the physical model and boundary conditions of the workshop are established. Through the numerical simulation of indoor temperature field and velocity field under different working conditions, the air distribution forms under different working conditions are analyzed. The thermal comfort of the selected air distribution mode is evaluated by the air distribution characteristic index. Comparing and analyzing the evaluation results, the optimum air supply form and similar air conditioning design law of large space workshop are obtained. Based on the analysis of 12 operating conditions of different supply air speeds of 3.1 m / s, 5 m / s, 6 m / s, 10 掳, 20 掳, 30 掳, and different supply air heights of 6 m and 8 m, the results show that the air supply velocity is 6 m / s. The distribution of velocity field is the most uniform and the condition of airflow distribution is the best in the indoor temperature field with angle of 30 掳.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU834.53;TB494

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