Radiation Thermal Resistance Calculator

✖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%
✖The Base Area refers to the area of one of the bases of a solid figure.ⓘ Base Area [A_base]			+10% -10%
✖Temperature of Surface 1 is the temperature of the 1st surface.ⓘ Temperature of Surface 1 [T₁]			+10% -10%
✖Temperature of Surface 2 is the temperature of the 2nd surface.ⓘ Temperature of Surface 2 [T₂]			+10% -10%

✖Thermal resistance of Heat Flow is a heat property and a measurement of a temperature difference by which an object or material resists a heat flow.ⓘ Radiation Thermal Resistance [R_h]

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Radiation Thermal Resistance Solution

STEP 0: Pre-Calculation Summary

Formula Used

Thermal Resistance of Heat Flow = 1/(Emissivity*[Stefan-BoltZ]*Base Area*(Temperature of Surface 1+Temperature of Surface 2)*(((Temperature of Surface 1)^2)+((Temperature of Surface 2)^2)))
R_h = 1/(ε*[Stefan-BoltZ]*A_base*(T₁+T₂)*(((T₁)^2)+((T₂)^2)))
This formula uses 1 Constants, 5 Variables

Constants Used

[Stefan-BoltZ] - Stefan-Boltzmann Constant Value Taken As 5.670367E-8

Variables Used

Thermal Resistance of Heat Flow - (Measured in Kelvin per Watt) - Thermal resistance of Heat Flow is a heat property and a measurement of a temperature difference by which an object or material resists a heat flow.
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.
Base Area - (Measured in Square Meter) - The Base Area refers to the area of one of the bases of a solid figure.
Temperature of Surface 1 - (Measured in Kelvin) - Temperature of Surface 1 is the temperature of the 1st surface.
Temperature of Surface 2 - (Measured in Kelvin) - Temperature of Surface 2 is the temperature of the 2nd surface.

STEP 1: Convert Input(s) to Base Unit

Emissivity: 0.95 --> No Conversion Required
Base Area: 9 Square Meter --> 9 Square Meter No Conversion Required
Temperature of Surface 1: 503 Kelvin --> 503 Kelvin No Conversion Required
Temperature of Surface 2: 293 Kelvin --> 293 Kelvin No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

R_h = 1/(ε*[Stefan-BoltZ]*A_base*(T₁+T₂)*(((T₁)^2)+((T₂)^2))) --> 1/(0.95*[Stefan-BoltZ]*9*(503+293)*(((503)^2)+((293)^2)))

Evaluating ... ...

R_h = 0.00764701436299724

STEP 3: Convert Result to Output's Unit

0.00764701436299724 Kelvin per Watt --> No Conversion Required

FINAL ANSWER

0.00764701436299724 ≈ 0.007647 Kelvin per Watt <-- Thermal Resistance of Heat Flow

(Calculation completed in 00.004 seconds)

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Home » Engineering » Chemical Engineering » Heat Transfer » Modes of Heat Transfer » Basics of Modes of Heat Transfer » Radiation Thermal Resistance

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< Basics of Modes of Heat Transfer Calculators

Radial Heat Flowing through Cylinder

LaTeX Go Heat = Thermal Conductivity of Heat*2*pi*Temperature Difference*Length of Cylinder/(ln(Outer Radius of Cylinder/Inner Radius of Cylinder))

Heat Transfer through Plane Wall or Surface

LaTeX Go Heat Flow Rate = -Thermal Conductivity of Heat*Cross Sectional Area*(Outside Temperature-Inside Temperature)/Width of Plane Surface

Radiative Heat Transfer

LaTeX Go Heat = [Stefan-BoltZ]*Body Surface Area*Geometric View Factor*(Temperature of Surface 1^4-Temperature of Surface 2^4)

Total Emissive Power of Radiating Body

LaTeX Go Emissive Power per Unit Area = (Emissivity*(Effective Radiating Temperature)^4)*[Stefan-BoltZ]

Radiation Thermal Resistance Formula

LaTeX Go

What is Thermal resistance for heat radiation?

The heat radiation occurs by a different mechanism from the
thermal conduction or convection (heat transmission) where
heat is transferred via molecules. Through the heat radiation,
heat can be transferred in a vacuum where no object or fluid
exists.

How to Calculate Radiation Thermal Resistance?

Radiation Thermal Resistance calculator uses Thermal Resistance of Heat Flow = 1/(Emissivity*[Stefan-BoltZ]*Base Area*(Temperature of Surface 1+Temperature of Surface 2)*(((Temperature of Surface 1)^2)+((Temperature of Surface 2)^2))) to calculate the Thermal Resistance of Heat Flow, Radiation Thermal Resistance is represented as the reciprocal of the product of the radiative heat transfer coefficient and the surface area of the object that generates heat. Thermal Resistance of Heat Flow is denoted by R_h symbol.

How to calculate Radiation Thermal Resistance using this online calculator? To use this online calculator for Radiation Thermal Resistance, enter Emissivity (ε), Base Area (A_base), Temperature of Surface 1 (T₁) & Temperature of Surface 2 (T₂) and hit the calculate button. Here is how the Radiation Thermal Resistance calculation can be explained with given input values -> 0.007647 = 1/(0.95*[Stefan-BoltZ]*9*(503+293)*(((503)^2)+((293)^2))).

FAQ

What is Radiation Thermal Resistance?

Radiation Thermal Resistance is represented as the reciprocal of the product of the radiative heat transfer coefficient and the surface area of the object that generates heat and is represented as R_h = 1/(ε*[Stefan-BoltZ]*A_base*(T₁+T₂)*(((T₁)^2)+((T₂)^2))) or Thermal Resistance of Heat Flow = 1/(Emissivity*[Stefan-BoltZ]*Base Area*(Temperature of Surface 1+Temperature of Surface 2)*(((Temperature of Surface 1)^2)+((Temperature of Surface 2)^2))). 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, The Base Area refers to the area of one of the bases of a solid figure, Temperature of Surface 1 is the temperature of the 1st surface & Temperature of Surface 2 is the temperature of the 2nd surface.

How to calculate Radiation Thermal Resistance?

Radiation Thermal Resistance is represented as the reciprocal of the product of the radiative heat transfer coefficient and the surface area of the object that generates heat is calculated using Thermal Resistance of Heat Flow = 1/(Emissivity*[Stefan-BoltZ]*Base Area*(Temperature of Surface 1+Temperature of Surface 2)*(((Temperature of Surface 1)^2)+((Temperature of Surface 2)^2))). To calculate Radiation Thermal Resistance, you need Emissivity (ε), Base Area (A_base), Temperature of Surface 1 (T₁) & Temperature of Surface 2 (T₂). With our tool, you need to enter the respective value for Emissivity, Base Area, Temperature of Surface 1 & Temperature of Surface 2 and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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