Heat Radiation Calculator

✖Emissivity is equal to the ratio of emissive power of body temperature and emissive power of black at same temperature. It is denoted by e.ⓘ Emissivity [e]			+10% -10%
✖Radiating Efficiency is the efficiency of radiation of a surface, body, metal that how much radiation it produces.ⓘ Radiating Efficiency [K]			+10% -10%
✖The Temperature of Wall 1 is the degree or intensity of heat present in Wall1.ⓘ Temperature of Wall 1 [T₁]			+10% -10%
✖The Temperature of Wall 2 is defined as the heat maintained by wall 2 in a system of 2 walls.ⓘ Temperature of Wall 2 [T₂]			+10% -10%

✖Heat Radiation process by which energy in the form of electromagnetic radiation is emitted by a heated surface in all directions and travels directly to its point of absorption at the speed of light.ⓘ Heat Radiation [H]

⎘ Copy

👎

Formula

✖

Heat Radiation

Formula

`"H" = 5.72*"e"*"K"*(("T"_{"1"}/100)^4-("T"_{"2"}/100)^4)`

Example

`"3.356142W/m²*K"=5.72*"0.91"*"0.6"*(("300K"/100)^4-("299K"/100)^4)`

Calculator

LaTeX

Reset

👍

Download Electric Heating Formulas PDF PDF Image

Heat Radiation Solution

STEP 0: Pre-Calculation Summary

Formula Used

Heat Radiation = 5.72*Emissivity*Radiating Efficiency*((Temperature of Wall 1/100)^4-(Temperature of Wall 2/100)^4)
H = 5.72*e*K*((T₁/100)^4-(T₂/100)^4)
This formula uses 5 Variables

Variables Used

Heat Radiation - (Measured in Watt per Square Meter per Kelvin) - Heat Radiation process by which energy in the form of electromagnetic radiation is emitted by a heated surface in all directions and travels directly to its point of absorption at the speed of light.
Emissivity - Emissivity is equal to the ratio of emissive power of body temperature and emissive power of black at same temperature. It is denoted by e.
Radiating Efficiency - Radiating Efficiency is the efficiency of radiation of a surface, body, metal that how much radiation it produces.
Temperature of Wall 1 - (Measured in Kelvin) - The Temperature of Wall 1 is the degree or intensity of heat present in Wall1.
Temperature of Wall 2 - (Measured in Kelvin) - The Temperature of Wall 2 is defined as the heat maintained by wall 2 in a system of 2 walls.

STEP 1: Convert Input(s) to Base Unit

Emissivity: 0.91 --> No Conversion Required
Radiating Efficiency: 0.6 --> No Conversion Required
Temperature of Wall 1: 300 Kelvin --> 300 Kelvin No Conversion Required
Temperature of Wall 2: 299 Kelvin --> 299 Kelvin No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

H = 5.72*e*K*((T₁/100)^4-(T₂/100)^4) --> 5.72*0.91*0.6*((300/100)^4-(299/100)^4)

Evaluating ... ...

H = 3.35614219820874

STEP 3: Convert Result to Output's Unit

3.35614219820874 Watt per Square Meter per Kelvin --> No Conversion Required

FINAL ANSWER

3.35614219820874 ≈ 3.356142 Watt per Square Meter per Kelvin <-- Heat Radiation

(Calculation completed in 00.004 seconds)

You are here -

Home » Engineering » Electrical » Utilization of Electrical Energy » Electric Heating » Furnace Heating » Heat Radiation

Credits

Created by Prahalad Singh

Jaipur Engineering College and Research Centre (JECRC), Jaipur

Prahalad Singh has created this Calculator and 100+ more calculators!

Verified by Payal Priya

Birsa Institute of Technology (BIT), Sindri

Payal Priya has verified this Calculator and 1900+ more calculators!

< 8 Furnace Heating Calculators

Heat Conduction

Go Heat Conduction = (Thermal Conductivity*Area of Furnace*Total Time*(Temperature of Wall 1-Temperature of Wall 2))/Thickness of Wall

Energy Required by Furnace to Melt Steel

Go Energy = (Mass*Specific Heat*(Temperature of Wall 2-Temperature of Wall 1))+(Mass*Latent Heat)

Thickness of Cylinder

Go Thickness of Cylinder = 1/(2*pi)*sqrt((Specific Resistance*10^9)/(Relative Permeability*Frequency of Induction Furnace))

Equivalent Inductance of Furnace

Go Inductance = (pi*4*pi*10^-7*Number of Coil Turns^2*Diameter of Melt^2)/(4*Height of Melt)

Heat Radiation

Go Heat Radiation = 5.72*Emissivity*Radiating Efficiency*((Temperature of Wall 1/100)^4-(Temperature of Wall 2/100)^4)

Operating Frequency

Go Frequency of Induction Furnace = (Specific Resistance*10^9)/(4*pi^2*Thickness of Cylinder^2*Relative Permeability)

Specific Resistance using Operating Frequency

Go Specific Resistance = (Frequency of Induction Furnace*4*pi^2*Thickness of Cylinder^2*Relative Permeability)/10^9

Energy Efficiency

Go Energy Efficiency = Theoretical Energy/Actual Energy

Heat Radiation Formula

Heat Radiation = 5.72*Emissivity*Radiating Efficiency*((Temperature of Wall 1/100)^4-(Temperature of Wall 2/100)^4)
H = 5.72*e*K*((T₁/100)^4-(T₂/100)^4)

Is radiation hot or cold?

Radiation (similar to heat leaving a woodstove). This normal process of heat moving away from the body usually occurs in air temperatures lower than 68°F (20°C). The body loses 65% of its heat through radiation. Conduction (such as heat loss from sleeping on the cold ground).

How to Calculate Heat Radiation?

Heat Radiation calculator uses Heat Radiation = 5.72*Emissivity*Radiating Efficiency*((Temperature of Wall 1/100)^4-(Temperature of Wall 2/100)^4) to calculate the Heat Radiation, Heat Radiation is the transfer of heat from a hot body to a cold body in a straight line without affecting the intervening medium. The rate of heat emission is given by Stefan‘s law. Heat Radiation is denoted by H symbol.

How to calculate Heat Radiation using this online calculator? To use this online calculator for Heat Radiation, enter Emissivity (e), Radiating Efficiency (K), Temperature of Wall 1 (T₁) & Temperature of Wall 2 (T₂) and hit the calculate button. Here is how the Heat Radiation calculation can be explained with given input values -> 3.356142 = 5.72*0.91*0.6*((300/100)^4-(299/100)^4).

FAQ

What is Heat Radiation?

Heat Radiation is the transfer of heat from a hot body to a cold body in a straight line without affecting the intervening medium. The rate of heat emission is given by Stefan‘s law and is represented as H = 5.72*e*K*((T₁/100)^4-(T₂/100)^4) or Heat Radiation = 5.72*Emissivity*Radiating Efficiency*((Temperature of Wall 1/100)^4-(Temperature of Wall 2/100)^4). Emissivity is equal to the ratio of emissive power of body temperature and emissive power of black at same temperature. It is denoted by e, Radiating Efficiency is the efficiency of radiation of a surface, body, metal that how much radiation it produces, The Temperature of Wall 1 is the degree or intensity of heat present in Wall1 & The Temperature of Wall 2 is defined as the heat maintained by wall 2 in a system of 2 walls.

How to calculate Heat Radiation?

Heat Radiation is the transfer of heat from a hot body to a cold body in a straight line without affecting the intervening medium. The rate of heat emission is given by Stefan‘s law is calculated using Heat Radiation = 5.72*Emissivity*Radiating Efficiency*((Temperature of Wall 1/100)^4-(Temperature of Wall 2/100)^4). To calculate Heat Radiation, you need Emissivity (e), Radiating Efficiency (K), Temperature of Wall 1 (T₁) & Temperature of Wall 2 (T₂). With our tool, you need to enter the respective value for Emissivity, Radiating Efficiency, Temperature of Wall 1 & Temperature of Wall 2 and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

Home

FREE PDFs

🔍 Search