【作者】 马强；

【导师】 李安桂；

【作者基本信息】 西安建筑科技大学 ， 供热、供燃气、通风及空调工程， 2008， 硕士

【摘要】 呼和浩特抽水蓄能电站由于其特殊的地质条件,机电设备布置尺寸较为紧凑,工艺布置形式也不同于以往的水电站。不同的水电站地下厂房在通风设计上既存在共性又各具特点,因此,该水电站的厂房空间气流组织研究自然有其特殊性。本文结合本校承担的呼和浩特水电站地下厂房通风模型试验这一委托科研课题,通过检索、查阅大量相关科技文献和工程调研分析,进行了1∶20比例的热态模型试验研究。正确设计模型是呼和浩特抽水蓄能电站模型试验研究的前提。根据相似理论建立了试验模型。采用热量阿基米德数Ar_q作为相似准则,按照1/20的几何比例尺以及其它制约条件确定了各种相似比例尺。根据各种相似比例尺完成模型本体结构、模拟热源系统及模型送排风系统的设计和配置。试验研究分三个阶段进行,各阶段获得了相应的成果与结论。第一阶段试验的主要目的在于确定等温送风条件下最佳的送风口布置方案。第一阶段试验在3种送风量下,安排有19、38、16、22、8、12个风口等六种风口布置方案。在各个方案下,考察发电机层工作区的温度和速度分布。确定出最佳送风口方案为12个风口布置形式,研究表明原型送风速度为11.88m/s、送风口直径为500mm时气流组织方案为最佳。第二阶段试验对发电机层空间上空气分布进行初步研究,对垂直方向上的温度、速度分布进行了理论分析,并选取三个典型断面进行模型试验,推导出三种送风量下空间温度、速度和无因次高度的关系式。第三阶段热态模型试验研究在第一阶段试验确定的最佳送风参数下,改变热源强度和送风温度,测定温度场和速度场,探讨了各参数分布趋势和变化规律,研究表明,温度效率随热源强度增大而增加,而基本不随送风温度变化。本论文成果不仅直接用于呼和浩特水电站工程建设,对同类电站通风方案的拟定也有一定的参考价值,为同类建筑气流组织设计提供了技术依据。更多还原

【Abstract】 The size of machine electricity equipments of HuHeHaoTe hydropower station is very compact, and the craft form is also different from the formerly pump water station. Different underground powerhouses of water power station has different ventilation character though some common character. So, air distribution of the water station has its particularity and application value. This thesis combined with the commissioned scientific research about ventilation model experiment of HuHeHaoTe hydropower station’s underground houses, first make out the history, status, development trend and existent problem of ventilation and air condition technology application in underground hydropower station at home and abroad by indexing and checking the related large quantity technology references and engineering analysis. The ratio of ventilation experiment model is 1/20.Design the model rightly is a premise of air distribution model test in HuHeHaoTe hydropower station. The author establish experiment model according to the similarity theories. Adopting Archimedes number Ar_q as similarity standard, the author determine every kind of similarity scale according to geometry scale 1/20 and other limit condition, at the same time, completing organization of model essence, simulation heat source system, design and arrangement of air supply and exhaust system according to every kinds of similarity scale.The research is divided into 3 steps, each step acquire relevant conclusion.The main purpose of the 1 st step is to make out the best ways of distribution of air inlets. There are 6 methods of distribution such as 19, 38, 16, 22, 8, 12 inlets in three velocity of air ventilation. Under every ways, temperature and velocity’s distribution in the layer are considered; thus this study get the best method: 12 inlets, 11.88 m/s, 500 mm.The 2nd step makes experiment study about the current of air distribution in house space. After making theory analysis on temperature and velocity distribution at vertical plane, the author takes three typical section to measure the air temperature and velocity of the given section and deduces the hypostasis form of distribution of temperature and velocity under 3 air supply in house space.On the basis of 1st steps, the author changes the intensity of heat source and the temperature of air supply in 3rd step, then measure the temperature field and velocity field, and make out the general regulation. The temperature efficiency will increase as the heat source increase, but it will not change when the temperature of air supply change.The conclusion of the thesis not only is useful to this project, but also has important reference value on establish of project on congeneric hydropower station. Moreover, it provide technique gist to congeneric construction.更多还原