Thermal Emittance
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Development of paints with infrared radiation reflective properties
Abstract Large buildings situated in hot regions of the Globe need to be agreeable to their residents. Air conditioning is extensively used to make these buildings comfortable, with consequent energy consumption. Absorption of solar visible and infrared radiations are responsible for heating objects on the surface of the Earth, including hou
Polímeros. Publicado em: 2015-06
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2. Produção de Superfícies Seletivas de Ni/NiO para Aplicações em Coletores Solares / Produção de Superfícies Seletivas de Ni/NiO para Aplicações em Coletores Solares
Novas tecnologias e novos materiais vêm sendo desenvolvidos a fim de tornar a tecnologia solar economicamente mais atrativa. Materiais como o níquel (Ni) e o óxido de níquel (NiO) depositados sobre alumínio têm-se destacado em várias aplicações fototérmicas atuando como superfícies seletivas para a faixa do espectro solar. As superfícies seletiva
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/08/2011
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3. New concept of space radiator with variable emittance
A new concept of space radiator of variable emittance for satellite thermal control is presented. The radiator is composed of two stages which exchange heat through radiation between finned surfaces covered with variable emittance coatings, whose emissivity is increased with temperature. Under cold conditions the radiative heat coupling between the stages is
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-12
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4. Estudo Comparativo de SuperfÃcies Seletivas para Coletores Solares / Comparative Study of Selective Surfaces for Solar Collectors
In practical applications of active and passive solar energy, or other construction purposes, the coating material which absorbs solar radiation has an important role as regards the absorption and emission of thermal radiation and, directly influencing the cost benefit the product. Surface coatings for solar radiation-absorbing plate or selective surfaces, c
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/12/2001
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5. Numerical and experimental investigation of thermal louvers for space applications
Thermal louvers, using movable or rotating shutters over a radiating surface, have gained a wide acceptance as highly efficient devices for controlling the temperature of a spacecraft. This paper presents a detailed analysis of the performance of a rectangular thermal louver with movable blades. The radiative capacity of the louver, determined by its effecti
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2001
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6. Tranferencia de calor no escoamento de gases participantes em alta temperatura atraves de dutos de secção circular revestidos com isolamento não ideal
In this Master degree thesis, the heat transfer in the flow of participating gases through circular cross section ducts is studied, combining the three basic processes: conduction, convection and radiation. It is considered the case in which a high temperature gas tlows through a tube covered by a non-ideal insulation. The gas inlet temperature is uniform an
Publicado em: 1995