Emissivity in Heat Transfer Formulas

Emissivity is the ability of an object to emit infrared energy. Emissivity can have a value from 0 (shiny mirror) to 1.0 (blackbody). Most organic or oxidized surfaces have emissivity close to 0.95. And is denoted by ε.

Heat Transfer formulas that make use of Emissivity

fxHeat Exchange by Radiation due to Geometric ArrangementGo

fxBlack Bodies Heat Exchange by RadiationGo

fxNon Ideal Body Surface EmittanceGo

FAQ

What is the Emissivity?

Emissivity is the ability of an object to emit infrared energy. Emissivity can have a value from 0 (shiny mirror) to 1.0 (blackbody). Most organic or oxidized surfaces have emissivity close to 0.95.

Can the Emissivity be negative?

{YesorNo}, the Emissivity, measured in {OutputVariableMeasurementName} {CanorCannot} be negative.

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