This paper highlights the main causes of heat losses in heat networks and methods, that can significantly reduce heat losses, which means to increase the efficiency of heat supply systems.
The results of experimental research on determination of thermal and technical characteristics of pre-insulated pipes are presented in the paper. Experimentally, the data on the thermal conductivity of the closed-cell foam samples were obtained.
The study was conducted in two popular ways using advanced equipment. As a result, the obtained data was compared and the error of the experiment was determined, which did not exceed the admissible values.
In addition, the characteristics of popular thermal insulation materials for heat transfer network - mineral wool and polyurethane foam were compared. From the obtained comparison, it is clear that polyurethane foam is a modern material with high thermal performance, is safe for humans and retains its properties over a long period.
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