Experimental definition of integrated emissivity factor of ultrathin fluid composite heat insulating coatings
The relevance of the research is determined by the contemporary world tendencies in the sphere of energy and resources saving policy that involves the necessity of more rational environmental management including the field of construction. The usage of modern heat insulation materials will allow sol...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | Russian |
| Published: |
Tomsk Polytechnic University
2017-09-01
|
| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya.tpu.ru/archive/article/view/1756 |
| Summary: | The relevance of the research is determined by the contemporary world tendencies in the sphere of energy and resources saving policy that involves the necessity of more rational environmental management including the field of construction. The usage of modern heat insulation materials will allow solving the problem of the rational exploitation of the Earth mineral resources. The evaluation of different modern heat-insulating coats applicability represents the topical problem that involves the necessity to check by experiment the values of the total emissivity of the ultrathin liquid composition heat-insulating coating and detect their true values. The aim of the research is to develop measuring technique and design a laboratory research installation; to carry out the experiment on defining the values of emissivity factor of ultrathin liquid composite coatings by the developed method. Research methods: empirical definition of the coating emissivity factor using the proposed laboratory device, including the system of «grey» bodies, gauges of thermocouples and a source of a stationary thermal stream. Results. The authors have determined by experiment the integrated emissivity factor of ultrathin liquid composite heat insulating coatings. It is e =0,89 for «the sample no. 1», and it is e =0,87 for the «sample no. 2» within 35-65 °C. The measuring error was calculated. The actual emissivity factor of the studied samples was higher than the declared one. Despite this, similar liquid heat insulating coatings are of great interest to builders as they allow warming objects of complex geometrical shapes (valve chambers, complex assemblies, etc.) and in some cases they become almost irreplaceable. The proper account of paint heating qualities will allow avoiding the above-limit growth of heat loss in isolated pipelines with heat transfer materials or building structures, and protect them from possible thawing in the period of subzero weather. |
|---|---|
| ISSN: | 2500-1019 2413-1830 |