Total Resistance in Radiation Heat Transfer given Emissivity and Number of Shields Calculator

✖Number of Shields is defined as the total number of shields or resistances present between the surfaces.ⓘ Number of Shields [n]			+10% -10%
✖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.ⓘ Emissivity [ε]			+10% -10%

✖Resistance for heat radiation is represented as the reciprocal of the product of the radiative heat transfer coefficient and the surface area of the object that generates heat.ⓘ Total Resistance in Radiation Heat Transfer given Emissivity and Number of Shields [R]

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Formula

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Total Resistance in Radiation Heat Transfer given Emissivity and Number of Shields

Formula

`"R" = ("n"+1)*((2/"ε")-1)`

Example

`"3.315789"=("2"+1)*((2/"0.95")-1)`

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Total Resistance in Radiation Heat Transfer given Emissivity and Number of Shields Solution

STEP 0: Pre-Calculation Summary

Formula Used

Resistance = (Number of Shields+1)*((2/Emissivity)-1)
R = (n+1)*((2/ε)-1)
This formula uses 3 Variables

Variables Used

Resistance - Resistance for heat radiation is represented as the reciprocal of the product of the radiative heat transfer coefficient and the surface area of the object that generates heat.
Number of Shields - Number of Shields is defined as the total number of shields or resistances present between the surfaces.
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.

STEP 1: Convert Input(s) to Base Unit

Number of Shields: 2 --> No Conversion Required
Emissivity: 0.95 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

R = (n+1)*((2/ε)-1) --> (2+1)*((2/0.95)-1)

Evaluating ... ...

R = 3.31578947368421

STEP 3: Convert Result to Output's Unit

3.31578947368421 --> No Conversion Required

FINAL ANSWER

3.31578947368421 ≈ 3.315789 <-- Resistance

(Calculation completed in 00.020 seconds)

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