舰船热力管道保温层受潮对保温性能的影响  

Effect of Damped Heat Insulation Layer of Ship Steam Pipeline on Heat Presevation

作　　者：石宏臣[1] 孙丰瑞[1] 杨立[1] 范春利[1] 

机构地区：[1]海军工程大学动力工程学院,湖北武汉430033

出　　处：《红外》2014年第5期24-28,共5页Infrared

基　　金：国家自然科学基金项目(50906099)

摘　　要：舰船热力管道的保温层受潮后会影响管道的保温效果,并会腐蚀管道。建立了保温层受潮模型,采用有限体积法计算了蒸汽管道保温层受潮后的温度场分布以及外表面的温度、传热损失随保温层受潮厚度变化的趋势。结果表明,选定保温材料后,当受潮厚度达到20 mm时温度就会超标。对于相同厚度的受潮区域,离外表面越近,外表面的温度就越高。结果揭示了做好保温层外表面防护的重要性,并为红外热成像诊断提供了依据。When the heat insulation layer of ship thermodynamic pipeline is damped, its heat insulation effectiveness can be reduced and the pipeline can be corroded. A model of damped heat insulation layer is established. The finite volume method is used to calculate the variation of temperature field, outer surface temperature and heat transfer loss of the heat insulation laver of a vapor pipeline with the damp thickness of the layer. The result shows that when the damp thickness is up to 20 mm, the temperature of the heat insulation layer will exceed its standard. For a damp area with same thickness, the nearer the outer surface is, the higher its temperature is. This reveals the importance of protecting the outer surface of a heat insulation laver and provides the basis for infrared thermal imaging diagnosis of heat insulation layers.

关 键 词：保温层 热力管道 有限体积法 红外热诊断 

分 类 号：U674.70[交通运输工程—船舶及航道工程]