thermal absorptance
[/ˈθɜːrməl əbˈzɔrptəns/]
nounfemininepl: thermal absorptances
absortância térmica
1. The fraction or percentage of thermal radiation incident on a surface that is absorbed by that surface, typically expressed as a decimal between 0 and 1 or as a percentage.
The thermal absorptance of the black coating is 0.95, meaning it absorbs 95% of incident thermal radiation.
A absortância térmica do revestimento preto é de 0,95, o que significa que ele absorve 95% da radiação térmica incidente.
2. A material property in thermodynamics and heat transfer that describes how effectively a material absorbs infrared or thermal radiation.
Engineers must consider the thermal absorptance when designing solar collectors for maximum heat absorption.
Os engenheiros devem considerar a absortância térmica ao projetar coletores solares para máxima absorção de calor.
This is a technical term primarily used in scientific and engineering contexts in both Brazil and the USA. It is essential in discussions about solar energy, building materials, spacecraft design, and thermal management systems. The term maintains the same meaning and usage across English and Portuguese-speaking countries, with 'absortância térmica' being the established technical translation in Brazilian Portuguese.
Related Idioms & Phrases
high thermal absorptance material
low thermal absorptance surface
measure the thermal absorptance
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