基于RWI指标的地铁空调变风量分析

发布时间：2018-04-03 11:15

本文选题：地铁站　切入点：数值模拟　出处：《西安科技大学》2011年硕士论文

【摘要】：随着城市地铁的大规模建设,地铁站台环境成为研究人员越来越关心的课题。建立良好的地铁环境的目的不仅仅在于提供一个安全、舒适的乘车环境,而且对于节省能源、降低建设与运行费用都有实际的意义。本文结合西安某地铁站,依据地铁的远期空调初步设计方案,详细计算了地铁站台内人员、灯光、广告、屏蔽门及附属设备的逐时负荷。在负荷计算的基础上,提出了两种变风量空调方案。一种是站台设计温度为恒定28°C的变风量空调方案,一种是站台设计温度采用RWI值计算出的站台逐时目标温度的变风量空调方案,通过分析两种方案的送风量,得出在能耗增加不大的情况下,为了满足乘客的热舒适性要求,建议采用根据RWI值设定的站台温度变风量方案。针对上述空调方案,选择屏蔽门在全关和全开两种模式下,应用计算流体力学(CFD)模拟的方法分析了地铁空调在85%负荷和100%负荷下的变风量效果;选用标准κ?ε湍流模型作为物理模型,在优质的网格生成的基础上,对所要研究的物理量进行离散化处理,得出了站台的温度场与速度场。通过对温度场、速度场及其他相关数据的分析,结果表明,在变风量送风情况下,VAV环控方案可以达到节能的目的。另外,本文在复杂模型的网格生成,边界条件的简化,瞬态过程的简化等方面作了一些有益的探索,可以为类似的数值模拟问题提供借鉴。
[Abstract]:With the large-scale construction of urban subway, subway platform environment has become more and more concerned by researchers.The purpose of establishing a good subway environment is not only to provide a safe and comfortable riding environment, but also to save energy and reduce the construction and operation costs.Combined with a subway station in Xi'an, the hourly load of personnel, lights, advertisements, shielding doors and ancillary equipment in the subway platform is calculated in detail according to the preliminary design scheme of the long-term air conditioning system of the subway station.On the basis of load calculation, two VAV air conditioning schemes are proposed.One is the VAV air conditioning scheme with constant platform design temperature of 28 掳C, the other is the VAV air conditioning scheme calculated by using the RWI value of the platform design temperature. Through the analysis of the air supply volume of the two schemes,It is concluded that in order to meet the requirement of thermal comfort of passengers with little increase in energy consumption, it is suggested that the platform temperature variable air volume scheme be adopted according to the RWI value.In view of the above air conditioning scheme, the variable air volume effect of subway air conditioning under 85% load and 100% load is analyzed by using computational fluid dynamics (CFD) simulation method.The standard 魏-蔚 turbulence model is chosen as the physical model. On the basis of high quality mesh generation, the physical quantities to be studied are discretized, and the temperature field and velocity field of the platform are obtained.Through the analysis of temperature field, velocity field and other related data, the results show that the VAV environmental control scheme can achieve the purpose of energy saving under the condition of variable air volume supply.In addition, this paper makes some useful explorations on mesh generation of complex models, simplification of boundary conditions, simplification of transient processes, and so on, which can be used as a reference for similar numerical simulation problems.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：U231.4;TU831.8

【参考文献】