Net Heat Lost by Surface given Diffuse Radiosity 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 area is the amount of two-dimensional space taken up by an object.ⓘ Area [A]			+10% -10%
✖Diffuse Component of Reflectivity is the reflection off rough surfaces such as clothing, paper, and the asphalt roadway.ⓘ Diffuse Component of Reflectivity [ρ_D]			+10% -10%
✖Emissive Power of Blackbody is the energy of thermal radiation emitted in all directions per unit time from each unit area of a surface of blackbody at any given temperature.ⓘ Emissive Power of Blackbody [E_b]			+10% -10%
✖Diffuse Radiosity represents the rate at which radiation energy leaves a unit area of a surface in all directions.ⓘ Diffuse Radiosity [J_D]			+10% -10%

✖Heat Transfer is the amount of heat that is transferred per unit of time in some material, usually measured in watts (joules per second).ⓘ Net Heat Lost by Surface given Diffuse Radiosity [q]

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Net Heat Lost by Surface given Diffuse Radiosity

Formula

`"q" = (("ε"*"A")/("ρ"_{"D"}))*(("E"_{"b"}*("ε"+"ρ"_{"D"}))-"J"_{"D"})`

Example

`"33411.27W"=(("0.95"*"50.3m²")/("0.5"))*(("700W/m²"*("0.95"+"0.5"))-"665.4W/m²")`

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Net Heat Lost by Surface given Diffuse Radiosity Solution

STEP 0: Pre-Calculation Summary

Formula Used

Heat Transfer = ((Emissivity*Area)/(Diffuse Component of Reflectivity))*((Emissive Power of Blackbody*(Emissivity+Diffuse Component of Reflectivity))-Diffuse Radiosity)
q = ((ε*A)/(ρ_D))*((E_b*(ε+ρ_D))-J_D)
This formula uses 6 Variables

Variables Used

Heat Transfer - (Measured in Watt) - Heat Transfer is the amount of heat that is transferred per unit of time in some material, usually measured in watts (joules per second).
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.
Area - (Measured in Square Meter) - The area is the amount of two-dimensional space taken up by an object.
Diffuse Component of Reflectivity - Diffuse Component of Reflectivity is the reflection off rough surfaces such as clothing, paper, and the asphalt roadway.
Emissive Power of Blackbody - (Measured in Watt per Square Meter) - Emissive Power of Blackbody is the energy of thermal radiation emitted in all directions per unit time from each unit area of a surface of blackbody at any given temperature.
Diffuse Radiosity - (Measured in Watt per Square Meter) - Diffuse Radiosity represents the rate at which radiation energy leaves a unit area of a surface in all directions.

STEP 1: Convert Input(s) to Base Unit

Emissivity: 0.95 --> No Conversion Required
Area: 50.3 Square Meter --> 50.3 Square Meter No Conversion Required
Diffuse Component of Reflectivity: 0.5 --> No Conversion Required
Emissive Power of Blackbody: 700 Watt per Square Meter --> 700 Watt per Square Meter No Conversion Required
Diffuse Radiosity: 665.4 Watt per Square Meter --> 665.4 Watt per Square Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

q = ((ε*A)/(ρ_D))*((E_b*(ε+ρ_D))-J_D) --> ((0.95*50.3)/(0.5))*((700*(0.95+0.5))-665.4)

Evaluating ... ...

q = 33411.272

STEP 3: Convert Result to Output's Unit

33411.272 Watt --> No Conversion Required

FINAL ANSWER

33411.272 ≈ 33411.27 Watt <-- Heat Transfer

(Calculation completed in 00.004 seconds)

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Created by Ayush gupta

University School of Chemical Technology-USCT (GGSIPU), New Delhi

Ayush gupta has created this Calculator and 300+ more calculators!

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University of Hawaiʻi at Mānoa (UH Manoa), Hawaii, USA

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< 8 Radiation Exchange with Specular Surfaces Calculators

Net Heat Lost by Surface given Diffuse Radiosity

Go Heat Transfer = ((Emissivity*Area)/(Diffuse Component of Reflectivity))*((Emissive Power of Blackbody*(Emissivity+Diffuse Component of Reflectivity))-Diffuse Radiosity)

Diffuse Radiation Exchange from Surface 1 to Surface 2

Go Heat Transfer from Surface 1 to 2 = (Diffuse Radiosity for Surface 1*Surface Area of Body 1*Radiation Shape Factor 12)*(1-Specular Component of Reflectivity of Surface 2)

Diffuse Radiation Exchange from Surface 2 to Surface 1

Go Heat Transfer from Surface 2 to 1 = Diffuse Radiosity for Surface 2*Surface Area of Body 2*Radiation Shape Factor 21*(1-Specular Component of Reflectivity of Surface 1)

Net Heat Lost by Surface

Go Heat Transfer = Area*((Emissivity*Emissive Power of Blackbody)-(Absorptivity*Irradiation))

Diffuse Radiosity

Go Diffuse Radiosity = ((Emissivity*Emissive Power of Blackbody)+(Diffuse Component of Reflectivity*Irradiation))

Direct Diffuse Radiation from Surface 2 to Surface 1

Go Heat Transfer from Surface 2 to 1 = Surface Area of Body 2*Radiation Shape Factor 21*Radiosity of 2nd Body

Transmissivity given Specular and Diffuse Component

Go Transmissivity = (Specular Component of Transmissivity +Diffuse Component of Transmissivity)

Reflectivity given Specular and Diffuse Component

Go Reflectivity = Specular Component of Reflectivity+Diffuse Component of Reflectivity

< 21 Important Formulas in Gas Radiation, Radiation Exchange with Specular Surfaces & more Special Cases Calculators

Net Heat Lost by Surface given Diffuse Radiosity

Go Heat Transfer = ((Emissivity*Area)/(Diffuse Component of Reflectivity))*((Emissive Power of Blackbody*(Emissivity+Diffuse Component of Reflectivity))-Diffuse Radiosity)

Transmissivity of Transparent Medium given Radiosity and Shape Factor

Go Transmissivity of Transparent Medium = Radiation Heat Transfer/(Surface Area of Body 1*Radiation Shape Factor 12*(Radiosity of 1st Body-Radiosity of 2nd Body))

Net Heat Exchange in Transmission Process

Go Radiation Heat Transfer = Surface Area of Body 1*Radiation Shape Factor 12*Transmissivity of Transparent Medium*(Radiosity of 1st Body-Radiosity of 2nd Body)

Diffuse Radiation Exchange from Surface 1 to Surface 2

Go Heat Transfer from Surface 1 to 2 = (Diffuse Radiosity for Surface 1*Surface Area of Body 1*Radiation Shape Factor 12)*(1-Specular Component of Reflectivity of Surface 2)

Diffuse Radiation Exchange from Surface 2 to Surface 1

Go Heat Transfer from Surface 2 to 1 = Diffuse Radiosity for Surface 2*Surface Area of Body 2*Radiation Shape Factor 21*(1-Specular Component of Reflectivity of Surface 1)

Energy Leaving Surface 1 that is Transmitted through Medium

Go Energy Leaving Surface = Radiosity of 1st Body*Surface Area of Body 1*Radiation Shape Factor 12*Transmissivity of Transparent Medium

Net Heat Lost by Surface

Go Heat Transfer = Area*((Emissivity*Emissive Power of Blackbody)-(Absorptivity*Irradiation))

Radiation Intensity at given Distance using Beer's Law

Go Radiation Intensity at Distance x = Initial Radiation Intensity*exp(-(Monochromatic Absorption Coefficient*Distance))

Initial Radiation Intensity

Go Initial Radiation Intensity = Radiation Intensity at Distance x/exp(-(Monochromatic Absorption Coefficient*Distance))

Diffuse Radiosity

Go Diffuse Radiosity = ((Emissivity*Emissive Power of Blackbody)+(Diffuse Component of Reflectivity*Irradiation))

Direct Diffuse Radiation from Surface 2 to Surface 1

Go Heat Transfer from Surface 2 to 1 = Surface Area of Body 2*Radiation Shape Factor 21*Radiosity of 2nd Body

Monochromatic Transmissivity

Go Monochromatic Transmissivity = exp(-(Monochromatic Absorption Coefficient*Distance))

Emissive Power of Blackbody through Medium given Emissivity of Medium

Go Emissive Power of Blackbody through Medium = Radiosity for Transparent Medium/Emissivity of Medium

Emissivity of Medium given Emissive Power of Blackbody through Medium

Go Emissivity of Medium = Radiosity for Transparent Medium/Emissive Power of Blackbody through Medium

Energy Emitted by Medium

Go Radiosity for Transparent Medium = Emissivity of Medium*Emissive Power of Blackbody through Medium

Transmissivity given Specular and Diffuse Component

Go Transmissivity = (Specular Component of Transmissivity +Diffuse Component of Transmissivity)

Temperature of Medium given Emissive Power of Blackbody

Go Temperature of Medium = (Emissive Power of Blackbody through Medium/[Stefan-BoltZ])^(1/4)

Emissive Power of Blackbody through Medium

Go Emissive Power of Blackbody through Medium = [Stefan-BoltZ]*(Temperature of Medium^4)

Reflectivity given Specular and Diffuse Component

Go Reflectivity = Specular Component of Reflectivity+Diffuse Component of Reflectivity

Monochromatic Absorption Coefficient if Gas is Non-Reflecting

Go Monochromatic Absorption Coefficient = 1-Monochromatic Transmissivity

Monochromatic Transmissivity if Gas is Non Reflecting

Go Monochromatic Transmissivity = 1-Monochromatic Absorption Coefficient

Net Heat Lost by Surface given Diffuse Radiosity Formula

What is Radiation?

Radiation is energy that comes from a source and travels through space at the speed of light. This energy has an electric field and a magnetic field associated with it, and has wave-like properties. You could also call radiation “electromagnetic waves”.

What is Reflectivity?

A measure of the ability of a surface to reflect radiation, equal to the reflectance of a layer of material sufficiently thick for the reflectance not to depend on the thickness.

How to Calculate Net Heat Lost by Surface given Diffuse Radiosity?

Net Heat Lost by Surface given Diffuse Radiosity calculator uses Heat Transfer = ((Emissivity*Area)/(Diffuse Component of Reflectivity))*((Emissive Power of Blackbody*(Emissivity+Diffuse Component of Reflectivity))-Diffuse Radiosity) to calculate the Heat Transfer, The Net Heat Lost by Surface given Diffuse Radiosity formula is defined as the function of Emissivity, area of heat transfer, diffuse component of reflectivity, emissive power of blackbody and diffuse radiosity where 1 − ρs has been substituted for ε + ρD. No real surface is completely diffuse or completely specular. We shall assume, however, that all the surfaces to be considered emit radiation diffusely but that they may reflect radiation partly in a specular manner and partly in a diffuse manner. Heat Transfer is denoted by q symbol.

How to calculate Net Heat Lost by Surface given Diffuse Radiosity using this online calculator? To use this online calculator for Net Heat Lost by Surface given Diffuse Radiosity, enter Emissivity (ε), Area (A), Diffuse Component of Reflectivity (ρ_D), Emissive Power of Blackbody (E_b) & Diffuse Radiosity (J_D) and hit the calculate button. Here is how the Net Heat Lost by Surface given Diffuse Radiosity calculation can be explained with given input values -> 33411.27 = ((0.95*50.3)/(0.5))*((700*(0.95+0.5))-665.4).

FAQ

What is Net Heat Lost by Surface given Diffuse Radiosity?

The Net Heat Lost by Surface given Diffuse Radiosity formula is defined as the function of Emissivity, area of heat transfer, diffuse component of reflectivity, emissive power of blackbody and diffuse radiosity where 1 − ρs has been substituted for ε + ρD. No real surface is completely diffuse or completely specular. We shall assume, however, that all the surfaces to be considered emit radiation diffusely but that they may reflect radiation partly in a specular manner and partly in a diffuse manner and is represented as q = ((ε*A)/(ρ_D))*((E_b*(ε+ρ_D))-J_D) or Heat Transfer = ((Emissivity*Area)/(Diffuse Component of Reflectivity))*((Emissive Power of Blackbody*(Emissivity+Diffuse Component of Reflectivity))-Diffuse Radiosity). 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 area is the amount of two-dimensional space taken up by an object, Diffuse Component of Reflectivity is the reflection off rough surfaces such as clothing, paper, and the asphalt roadway, Emissive Power of Blackbody is the energy of thermal radiation emitted in all directions per unit time from each unit area of a surface of blackbody at any given temperature & Diffuse Radiosity represents the rate at which radiation energy leaves a unit area of a surface in all directions.

How to calculate Net Heat Lost by Surface given Diffuse Radiosity?

The Net Heat Lost by Surface given Diffuse Radiosity formula is defined as the function of Emissivity, area of heat transfer, diffuse component of reflectivity, emissive power of blackbody and diffuse radiosity where 1 − ρs has been substituted for ε + ρD. No real surface is completely diffuse or completely specular. We shall assume, however, that all the surfaces to be considered emit radiation diffusely but that they may reflect radiation partly in a specular manner and partly in a diffuse manner is calculated using Heat Transfer = ((Emissivity*Area)/(Diffuse Component of Reflectivity))*((Emissive Power of Blackbody*(Emissivity+Diffuse Component of Reflectivity))-Diffuse Radiosity). To calculate Net Heat Lost by Surface given Diffuse Radiosity, you need Emissivity (ε), Area (A), Diffuse Component of Reflectivity (ρ_D), Emissive Power of Blackbody (E_b) & Diffuse Radiosity (J_D). With our tool, you need to enter the respective value for Emissivity, Area, Diffuse Component of Reflectivity, Emissive Power of Blackbody & Diffuse Radiosity and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Heat Transfer?

In this formula, Heat Transfer uses Emissivity, Area, Diffuse Component of Reflectivity, Emissive Power of Blackbody & Diffuse Radiosity. We can use 2 other way(s) to calculate the same, which is/are as follows -

Heat Transfer = Area*((Emissivity*Emissive Power of Blackbody)-(Absorptivity*Irradiation))
Heat Transfer = Area*((Emissivity*Emissive Power of Blackbody)-(Absorptivity*Irradiation))

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