thermal emittance
[/ˈθɜːrməl ɪˈmɪtəns/]
nounpl: thermal emittances
emitância térmica
1. The ratio of thermal radiation emitted by a surface to the thermal radiation emitted by an ideal blackbody at the same temperature; a measure of how effectively a material emits thermal energy
The thermal emittance of the spacecraft's coating was carefully measured to ensure proper heat dissipation in orbit.
A emitância térmica do revestimento da nave espacial foi cuidadosamente medida para garantir a dissipação adequada de calor em órbita.
2. In physics and engineering, the property of a material to radiate heat energy across the electromagnetic spectrum
Materials with high thermal emittance are preferred for radiator panels in thermal control systems.
Materiais com alta emitância térmica são preferidos para painéis radiadores em sistemas de controle térmico.
This is a specialized technical term used primarily in physics, aerospace engineering, materials science, and thermal engineering. It is essential in the design of spacecraft thermal control systems and industrial applications. The term is highly standardized in international scientific literature and maintains the same meaning across Portuguese-speaking countries and English-speaking regions.
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