【作者】 王易军；

【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， 2007， 硕士

【摘要】 我国的地下水电站建设无论是数量还是规模均为世界第一，主要分布在黄河水系和长江水系。在能源越来越匮乏的今天，利用土壤、岩石、水电站坝体中的廊道作为天然冷热源有很好的节能及环保意义。景洪水电站坝体不同高程设有灌浆、排水、观测、交通和检查等多条廊道，并设有专门竖井及相应的水平廊道，使各层廊道上下连通，形成一个巨大的通道网络，为上游副厂房利用坝体廊道通风提供了良好的条件，受到了广泛的关注。国内外对等截面直线地下廊道的换热效果进行了大量研究。但是，地下水电站廊道十分复杂，以景洪水电站为例，其坝体各类廊道纵横交错，帷幕灌浆、排水、检查、交通和观测廊道分别在不同的高程，每层之间专门设计了通风竖井相连接，造成各廊道通风换热的相互影响。前人进行了不同角度的研究，各文献提出的方法既有各自的优点，但也存在着一定的局限性。文献[1]的计算方法是按主要廊道的平均风量及平均廊道长度来计算廊道通风的温降，这种方法未考虑廊道结构的影响，且无法确定各廊道空气温度分布。由于坝体廊道结构复杂、体积庞大，若采用直接数值模拟(CFD)的方法，模型的建立复杂，对计算机CPU、内存容量的要求也非常高。本文在通风网络的基础上，提出了简化的通道单元数学模型，即先计算各廊道风量，用等效廊道长度的方法将通风网络和廊道通风温降的理论公式结合起来逐段计算各廊道温降，获得廊道群网络的温度分布。与FLUENT方法的计算结果进行对比，并以景洪水电站地下坝体廊道为例进行了分析，验证通道单元数学模型的可行性。这种方法既考虑了廊道网络结构对通风温降的影响，同时计算模型大为简化，为水电站通风空调设计方案及地下隧道温降风的利用提供参考。更多还原

【Abstract】 China’s underground hydropower station construction in terms of quantity and size were first in the world, mainly in the Yangtze River and Yellow River water system. Increasing energy shortage today, the use of soil, rock, the tunnel in Hydropower Dam as a natural cold and heat source is good energy-saving and environmental significance. JINGHONG Hydropower Dam filling with drainage, observation, inspection and traffic tunnel in different elevation. The tunnels in different elevation connect with specially designed ventilation shaft, forming a huge channel network. This provide good conditions for rational use of dam tunnel ventilation in upstream workshop. Thus subject to a wide range of concerns.A great deal of research for the effect of heat transfer in right straight underground tunnel at home and abroad. However, the tunnel in Hydropower Dam is complex. To the JINGHONG Hydropower Project as an example, it fill with drainage, observation, inspection and traffic tunnel in different elevation. The tunnels in different elevation connect with specially designed ventilation shaft. The result is that the tunnel ventilation heat transfer interaction. Predecessors of different angles of study, the literature of both methods with their respective advantages, but there are also some limitations. The literature [1] is calculated by the average major tunnel air volume and the average length of the tunnel to calculate tunnel ventilation temperature drop, This method does not take into tunnel structure, and impossible to determine the temperature distribution of air in tunnel. As the dam tunnel complex and large in size, the computer CPU and memory capacity requirements are very high for the use of numerical simulation (CFD). Study the flow temperature drop and distribution in tunnels of a dam based on the ventilation network theory, advance a simple unit-basis mathematical model. Compared with the results by FLUENT, and prove its efficiency through JINGHONG hydropower dam tunnels. It is useful for the air conditioning design of a hydropower station and exploitation of temperature drop flow in a underground tunnel.更多还原