THERMAL BEHAVIOUR OF HEAT TRANSFER PIPES WITH THIN THERMAL INSOLATION COATINGS
Penka N. Zlateva, Rositsa V. Petkova-Slipets and Zdravko N. Petrov
Pages: 39-47
ABSTRACT - The object of study is the influence of thickness of thin heat insulating coatings with different composition on thermal behaviour of heat transfer steel pipes. Coatings are on the basis of acrylic resin but with different fillers – ceramic hollow vacuum microcapsules and glass micro spheres (balloons). Infrared thermography was used to visualize the thermal effect during transportation of cold and hot fluid. The results are indicative for the possibility to achieve substantial heat reserve effect with thin layers. It was established that three layer coatings with thickness of 1,5-2 mm are more efficient than thinner one. The use of heat insulating mixture with ceramic vacuum microcapsules has as result a maximal effect of nearly 25 ℃ difference between temperatures of the heat transfer pipe and the coating surface during the transportation of hot fluid.
