空冷岛内气流分布不均对冷却效果的影响  

The Impact of Uneven Gas Flow Distribution inside Air-Cooling Island on Cooling Effect

作　　者：荆有印 丁桂艳[1] 王长海[1] 

机构地区：[1]华北电力大学能源与动力工程学院,河北保定071003

出　　处：《东北电力技术》2008年第11期4-7,共4页Northeast Electric Power Technology

摘　　要：在空冷式发电厂中,风机群布置在A-型翅片管束冷凝单元下面。为了揭示风机旋转气流对空冷单元内气流分布特性的影响,建立了风机及空冷单元的物理模型和数学模型,对空冷岛及其风机的流场进行了数值模拟,分析了空冷岛夏季工况出力不足的原因,并提出加装消旋格珊的改进措施,为空冷岛设计和改进提供了参考依据。Draft fan group is deployed under A-type finned tube bundles condensate unit in air-cooling power plant. To reveal the impact of rotating fan air flow on distribution feature inside the air-cooling unit, physical model and math model is set up for draft fan and air-cooling unit to make numerical simulation on air-cooling island and draft fan flow field. Also analysis is made on the inefficient out- put of summer working condition in side the air-cooling island, and proposals for adding despun grids are put forward, providing refereneas for the design and improvement for air-cooling island.

关 键 词：直接空冷 风机 数值模拟 Fan模型 

分 类 号：TM264.1[一般工业技术—材料科学与工程]