候车室论文某候车室气流组织的模拟研究.doc

候车室论文：某候车室气流组织的模拟研究 【中文摘要】本文以无锡火车站为研究对象,现场测试温度、速度、湿度、CO2浓度等参数,并分析这些参数的变化规律,再运用Airpak模拟软件和候车室额实际尺寸进行建模,分析现有空调系统的气流组织,得出温度、速度、湿度、C02浓度场,得到模拟的结果与实测数据相符,说明了该模拟软件的可行性。本文通过利用问卷调查和现场测试的方法,了解到室内的空气品质差,提出了适用于候车室的三种常用的三种送风方案,分别为上(顶棚)送下回、下送上回和中送上回。再分别运用Airpak模拟软件模拟这三种送风方案的温度场、速度场、CO2浓度场,根据他们各自的特征和舒适性进行分析。得出以下结论：1.方案一,采用上(顶棚)送下回的送风方式,室内的平均温度为26℃,平均风速为0.43m/s,速度和风速都大于设计需求；2.方案二,采用下(侧)送上回的送风形式,虽然平均温度、平均风速、平均CO2浓度都在设计规范的范围内,但是在靠近送风口的风速较高,在0.6m/s左右,远远大于设计规范的要求；3.方案三,采用中送上回的送风方案,平均温度为25℃,平均风速为0.24m/s,平均C02浓度为474ppmv,都达到了设计的要求。研究结果表明原有的空调系统基本符合设计规范,但是方案三为最佳的送风方案。图表参 【英文摘要】This thesis will take Wuxi railway station as its research. Filed test is used in this thesis, main test about temperature, velocity, relative humidity, carbon dioxide concentration. Airpak simulation software as a tool, and conduct a simulation study on the existing air conditioning system, A comparative study are carried out in terms of thermal field, velocity field, relative humidity filed, and carbon dioxide concentration filed. The results show that the simulation software is feasible.Results of field test and questionnaire investigation as to air quality of waiting room indicated that the indoor air quality was very poor. In this paper, three common air distribution forms were made and the accuracy of the Airpak model designed, these three designs are:up-supply (ceiling) down-return, up-return down-supply, central air-conditioning. Then Airpak was applied to numerically simulating the indoor temperature field, velocity field and carbon dioxide concentration field. Their features and comfort will be analyzed respectively.The research result has indicated that:1. ProgramⅠ, up-supply(ceiling) down-return, the average temperature is 26℃in room, the average wind velocity in the mark area is 0.43m/s, the average temperature and wind velocity are greater than the design requirements;2. ProgramⅡ, up-return down-supply, although the average temperature, ave