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Net Heat Lost by Surface given Diffuse Radiosity Formula

GoNet Heat Lost by Surface Formula

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Heat Transfer is the amount of heat that is transferred per unit of time in some material, usually measured in watts (joules per second). Check FAQs

q = (\frac{ε \cdot A}{ρ D}) \cdot ((E b \cdot (ε + ρ D)) - J D)

q - Heat Transfer?ε - Emissivity?A - Area?ρ_D - Diffuse Component of Reflectivity?E_b - Emissive Power of Blackbody?J_D - Diffuse Radiosity?

Net Heat Lost by Surface given Diffuse Radiosity Example

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Here is how the Net Heat Lost by Surface given Diffuse Radiosity equation looks like with Values.

Here is how the Net Heat Lost by Surface given Diffuse Radiosity equation looks like with Units.

Here is how the Net Heat Lost by Surface given Diffuse Radiosity equation looks like.

33411.272 = (\frac{0.95 \cdot 50.3}{0.5}) \cdot ((700 \cdot (0.95 + 0.5)) - 665.4)

33411.272W = (\frac{0.95 \cdot 50.3m²}{0.5}) \cdot ((700W/m² \cdot (0.95 + 0.5)) - 665.4W/m²)

33411.272 = (\frac{0.95 \cdot 50.3}{0.5}) \cdot ((700 \cdot (0.95 + 0.5)) - 665.4)

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Net Heat Lost by Surface given Diffuse Radiosity Solution

Follow our step by step solution on how to calculate Net Heat Lost by Surface given Diffuse Radiosity?

FIRST Step Consider the formula

q = (\frac{ε \cdot A}{ρ D}) \cdot ((E b \cdot (ε + ρ D)) - J D)

Next Step Substitute values of Variables

∴

q = (\frac{0.95 \cdot 50.3m²}{0.5}) \cdot ((700W/m² \cdot (0.95 + 0.5)) - 665.4W/m²)

Next Step Prepare to Evaluate

∴

q = (\frac{0.95 \cdot 50.3}{0.5}) \cdot ((700 \cdot (0.95 + 0.5)) - 665.4)

LAST Step Evaluate

∴

q = 33411.272W

Net Heat Lost by Surface given Diffuse Radiosity Formula Elements

Variables

Heat Transfer

Heat Transfer is the amount of heat that is transferred per unit of time in some material, usually measured in watts (joules per second).

Symbol: q

Measurement: PowerUnit: W

Note: Value can be positive or negative.

Formulas to find Heat Transfer

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.

Symbol: ε

Measurement: NAUnit: Unitless

Note: Value should be between 0 to 1.

Formulas to find Emissivity

Area

The area is the amount of two-dimensional space taken up by an object.

Symbol: A

Measurement: AreaUnit: m²

Note: Value should be greater than 0.

Formulas to find Area

Diffuse Component of Reflectivity

Diffuse Component of Reflectivity is the reflection off rough surfaces such as clothing, paper, and the asphalt roadway.

Symbol: ρ_D

Measurement: NAUnit: Unitless

Note: Value should be between 0 to 1.

Formulas to find Diffuse Component of Reflectivity

Emissive Power of Blackbody

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.

Symbol: E_b

Measurement: Heat Flux DensityUnit: W/m²

Note: Value should be greater than 0.

Formulas to find Emissive Power of Blackbody

Diffuse Radiosity

Diffuse Radiosity represents the rate at which radiation energy leaves a unit area of a surface in all directions.

Symbol: J_D

Measurement: Heat Flux DensityUnit: W/m²

Note: Value can be positive or negative.

Formulas to find Diffuse Radiosity

Other Formulas to find Heat Transfer

Go Net Heat Lost by Surface

q = A \cdot ((ε \cdot E b) - (α \cdot G))

Other formulas in Radiation Exchange with Specular Surfaces category

Go Initial Radiation Intensity

I λo = \frac{I λx}{\exp (- (α λ \cdot x))}

Go Monochromatic Absorption Coefficient if Gas is Non-Reflecting

α λ = 1 - 𝜏 λ

Go Monochromatic Transmissivity

𝜏 λ = \exp (- (α λ \cdot x))

Go Monochromatic Transmissivity if Gas is Non Reflecting

𝜏 λ = 1 - α λ

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

Net Heat Lost by Surface given Diffuse Radiosity evaluator uses Heat Transfer = ((Emissivity*Area)/(Diffuse Component of Reflectivity))*((Emissive Power of Blackbody*(Emissivity+Diffuse Component of Reflectivity))-Diffuse Radiosity) to evaluate 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 evaluate Net Heat Lost by Surface given Diffuse Radiosity using this online evaluator? To use this online evaluator 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.

FAQs on Net Heat Lost by Surface given Diffuse Radiosity

What is the formula to find Net Heat Lost by Surface given Diffuse Radiosity?

The formula of Net Heat Lost by Surface given Diffuse Radiosity is expressed as Heat Transfer = ((Emissivity*Area)/(Diffuse Component of Reflectivity))*((Emissive Power of Blackbody*(Emissivity+Diffuse Component of Reflectivity))-Diffuse Radiosity). Here is an example- 33411.27 = ((0.95*50.3)/(0.5))*((700*(0.95+0.5))-665.4).

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

With Emissivity (ε), Area (A), Diffuse Component of Reflectivity (ρ_D), Emissive Power of Blackbody (E_b) & Diffuse Radiosity (J_D) we can find Net Heat Lost by Surface given Diffuse Radiosity using the formula - Heat Transfer = ((Emissivity*Area)/(Diffuse Component of Reflectivity))*((Emissive Power of Blackbody*(Emissivity+Diffuse Component of Reflectivity))-Diffuse Radiosity).

What are the other ways to Calculate Heat Transfer?

Here are the different ways to Calculate Heat Transfer-

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

Can the Net Heat Lost by Surface given Diffuse Radiosity be negative?

Yes, the Net Heat Lost by Surface given Diffuse Radiosity, measured in Power can be negative.

Which unit is used to measure Net Heat Lost by Surface given Diffuse Radiosity?

Net Heat Lost by Surface given Diffuse Radiosity is usually measured using the Watt[W] for Power. Kilowatt[W], Milliwatt[W], Microwatt[W] are the few other units in which Net Heat Lost by Surface given Diffuse Radiosity can be measured.

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