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为了给保温管道的设计与管理提供参考数据 ,利用瞬态法对黄夹克泡沫保温管道的整管保温性能进行了试验研究。结果表明 ,刚出厂时整管的平均导热系数为 0 0 39W/m·℃ ,比常用的快速导热系数测定仪测定的导热系数 ( 0 0 2 5W/m·℃ )偏大 56% ,更接近部颁标准0 0 35W/m·℃ ;同样的保温管道放置 6年后 ,整管的平均导热系数为 0 0 52W/m·℃ ,比刚出厂时增大 33%。
In order to provide the reference data for the design and management of the insulated pipe, the transient performance of the whole pipe insulation performance of the yellow jacket foam insulated pipe was studied. The results showed that the average thermal conductivity of the whole pipe just delivered was 0 39 W / m · ℃, which was 56% larger than the thermal conductivity (0 0 2 5 W / m · ° C) measured by the conventional rapid thermal conductivity meter, Ministerial standard 0 0 35W / m · ℃; the same pipe insulation placed 6 years, the average thermal conductivity of the entire pipe is 0 0 52W / m · ℃, 33% higher than just factory.