富氧燃烧方式下烟气对受热面传热特性影响的数值研究  

Numerical Study on Heat Transfer Characteristics of Boiler Heating Surface under Oxyfuel Combustion

作　　者：米翠丽[1] 阎维平[1] 李皓宇[1] 

机构地区：[1]华北电力大学能源与动力工程学院教育部"电站设备状态监测与控制"重点实验室

出　　处：《电站系统工程》2009年第4期23-26,共4页Power System Engineering

基　　金：华北电力大学重大科研项目预研基金(200513003)资助

摘　　要：富氧燃烧方式下,烟气中70%以上均为CO2,这与常规锅炉燃烧产生的以N2为主的平均烟气成分有很大差异。为了研究烟气成分变化带来的换热系数的变化规律,采用数值模拟的方法对富氧燃烧方式下烟气的传热特性进行了研究,并与空气气氛下进行对比。结果表明,富氧气氛下换热系数较空气气氛下有显著提高。More than 70% is CO2 in the flue gas at oxyfuel combustion, which has great difference to average flue gas composition mainly N2 produced by ordinary boiler combustion. In order to investigate variation of heat transfer coefficient due to the change of smoke component, numerical simulation is adopted to research heating transfer characteristics of flue gas at oxyfuel combustion. The result is compared with air atmosphere. The end shows that the heat transfer coefficient under oxyfuel combustion is higher than air combustion. This conclusion has great value for optimum design of convective heating surfaces under oxyfuel combustion.

关 键 词：热能动力工程 富氧燃烧 受热面 传热特性 数值模拟 

分 类 号：TK224.1[动力工程及工程热物理—动力机械及工程]