管道多层隔热系统的传热分析及优化设计  

Optimal Designand and Heat Transfer Analysis of Multilayer Thermal Insulation for Pipeline

作　　者：苏高辉[1] 杨自春[1] 

机构地区：[1]海军工程大学船舶与动力学院,武汉430033

出　　处：《武汉理工大学学报》2011年第8期58-61,共4页Journal of Wuhan University of Technology

基　　金："十一五"总装预研基金(513270301)

摘　　要：采用能量平衡方程和P1阶微分近似法建立了由超细玻璃纤维和反射屏组成的管道多层隔热系统稳态传热的数学模型。利用该模型分析了反射屏层数、反射屏发射率、反射屏位置、温度等因素对系统隔热性能的影响。分析结果表明,系统的隔热性能随着反射屏层数的增加而提高,但是提高幅度逐渐减小,存在一个最佳的反射屏层数;反射屏的发射率强烈地影响系统的隔热性能,采用低发射率的反射屏对于提高系统隔热性能有着重要作用;反射屏位置对系统隔热性能有较大影响,将反射屏靠近高温面布置能获得更好的隔热效果。Combined energy equilibrium equation and P1 approximations were used to establish the steady-state heat transfer mathematic model of the multilayer thermal insulation composed of fine glass fiber and reflecting screens for pipeline.The influence of the number,location,emissivity of the reflecting screen and temperature on the insulating performance of the system was analysed based on the model.The analyzed results show that the insulating performance of the system increases with the reflecting screen number increase,but the increase level is smaller,and an optimal reflecting screen number exists.The emissivity of reflecting screen can strongly influence the insulating performance of the system,we can improve the insulating performance of the system by reduce the emissivity of reflecting screen.The location of reflecting screen can also greatly influence the insulating performance of the system,arranging the reflecting screen near the high temperature surface can get better insulating performance.

关 键 词：管道保温 多层隔热 稳态传热 

分 类 号：TK11[动力工程及工程热物理—热能工程]