emissivity of a thermal radiator
1Thermal radiation — is electromagnetic radiation emitted from the surface of an object which is due to the object s temperature. Infrared radiation from a common household radiator or electric heater is an example of thermal radiation, as is the light emitted by a… …
2Infrared and thermal testing — is one of many Nondestructive testing techniques designated by the American Society of Nondestructive Testing (ASNT) [Jackson, C.N. and C.N. Sherlock, 1998, Nondestructive Testing Handbook: Leak Testing, page 519, Library of Congress Cataloging… …
3коэффициент направленного теплового излучения — (ε(Θ, φ)) Отношение энергетической яркости теплового излучателя в данном направлении к энергетической яркости черного тела при той же температуре. [ГОСТ 7601 78] Тематики оптика, оптические приборы и измерения Обобщающие термины …
4коэффициент теплового излучения — (ε) Отношение энергетической светимости теплового излучателя к энергетической светимости черного тела при той же температуре. [ГОСТ 7601 78] Тематики оптика, оптические приборы и измерения Обобщающие термины тепловое излучение EN… …
5Thermography — Infrared Thermography, thermal imaging, or thermal video, is a type of infrared imaging science. Thermographic cameras detect radiation in the infrared range of the electromagnetic spectrum (roughly 900 ndash;14,000 nanometers or 0.9 ndash;14 µm) …
6Black body — As the temperature decreases, the peak of the blackbody radiation curve moves to lower intensities and longer wavelengths. The blackbody radiation graph is also compared with the classical model of Rayleigh and Jeans …
7Heat transfer — is a discipline of thermal engineering that concerns the exchange of thermal energy from one physical system to another. Heat transfer is classified into various mechanisms, such as heat conduction, convection, thermal radiation, and phase change …
8Building insulation — refers broadly to any object in a building used as insulation for any purpose. Whilst the majority of insulation in buildings is for thermal purposes, the term also applies to acoustic insulation, fire insulation, and impact insulation. Often an… …
9Underfloor heating — Heat can be provided by circulating heated water or by electric cable, mesh, or film heaters.Underfloor heating can be used with concrete and wooden floors, with all types of floor covering (e.g., stone, tile, wood, vinyl, and carpet), and at… …
10Solar collector — A solar collector is a device for extracting the energy of the sun not indirectly into a more usable or storable form. The energy in sunlight is in the form of electromagnetic radiation from the infrared (long) to the ultraviolet (short)… …
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