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摘要： 作为旅客集散场所的大型公共建筑，铁路客运站具有空间大、能耗高、人员密度大等特点。要实现高大空间建筑室内良好的热环境并节约能源，关键在于合理的气流组织。对于高大空间而言，分层空调无疑是一个最佳的选择，它可以很大程度的降低空调冷负荷和运行费用，其能源节约率可达14%-15%。本论文是以某中型火车站的两个候车大厅作为研究对象，以计算流体力学和传热学为基础，运用 模型对候车厅内速度与温度分布、PMV、PPD进行了三文数值模拟。数值模拟的结果表明，送风速度5.404m/s，送风温度19℃对于普通候车厅是合适的。送风速度4.38m/s，送风温度10℃对于软席候车厅是合适的。该送风参数可以为实际工程空调系统设计提供可参考的定量依据。10564
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关键词： 高大空间；气流组织；数值模拟；热舒适性
Numerical Simulation and Analysis for Railway Passenger Station’s Air-distribution based on AIRPAK
Abstract: As a large public building for distribute passengers, railway passenger station has the characteristics of a large space, high energy consumption and high density of staff. To satisfy comfortableness requests and attain energy conservation, the key question is about reasonable airflow organization. Based on extensive demonstration, stratified air-conditioning is the best choice for large spaces. It results in decreasing air-conditioning cooling load and operation cost. It can save the fourteen to fifteen percent of the total energy. In this dissertation, two waiting halls of a medium railway station are taken as a research object. Taking the computation hydrodynamics and the heat transfer study as the foundation, the turbulence model is used to simulate the three-dimension distribution of velocity, temperature, PMV and PPD in the hall. The results of numerical simulation show that it is fit for standard waiting room when the velocity and temperature of inlet is 5.404m/s and 19 ℃. It is fit for senior waiting room when the velocity and temperature of inlet is 4.38m/s and 10℃. This given air parameter can provide the referable quota basis for the actual project air-conditioning system design.
Keywords: Large space; Air distribution; Numerical simulation; Thermal comfort
目录
摘要 i
Abstract i
目录 ii
1 绪论 1
1.1 课题背景 1
1.2 研究目的和意义 1
1.3 国内外研究现状 2
1.3.1 CFD技术发展概况 2
1.3.2 气流组织发展概况 4
1.4 高大空间建筑 4
1.4.1 建筑特点 4
1.4.2 负荷研究 4
1.4.3 气流组织形式 4
1.5 发展趋势 5
2 数值模拟基础理论 6
2.1 数值求解的基本思想 6
2.2 常用的数值计算方法 6
2.3 湍流流动及其数值模拟方法 7
2.4 湍流基本模型 8
2.5 辐射模型 9
2.6 收敛原则 9
2.7 松弛因子的确定 9
2.8 AIRPAK 软件应用分析 9
3 候车大厅夏季空调负荷计算 11
3.1 候车大厅简介 11