Practice measurements of heat conductivity of various types of PUR-hard foam in plastic-jacket-pipes

被引：0

作者：

Just, Manfred ^{[1
]}

Rotermund, Udo ^{[2
]}

Schuricht, Winfried ^{[3
]}

Steickert, Wilfried ^{[4
]}

机构：

[1] IMA GmbH Dresden, Dresden, Germany

[2] BASF Schwarzheide GmbH, Schwarzheide, Germany

[3] GEF Chemnitz mbH, Chemnitz, Germany

[4] Stadtwerke Leipzig GmbH, Leipzig, Germany

来源：

Euroheat and Power/Fernwarme International | 2000年 / 29卷 / 08期

关键词：

Heat transfer - Pipelines;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Heat loss of plastic-jacket-pipes is measurable even under practice conditions. The slight temperature declines of an intact plastic jacket pipeline, the load fluctuations of a heating network and the unsteady conditions of the external heat transfer in the ground, impede an exact ascertainment of the absolute value of the heat conductivity, often also designated as λ-number. Field trials can be carried out quite precisely and permits statements on the degree of the reached improvement in the heat insulation.

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