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Net Heat Lost by Surface Formula

GoNet Heat Lost by Surface given Diffuse Radiosity 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 = A \cdot ((ε \cdot E b) - (α \cdot G))

q - Heat Transfer?A - Area?ε - Emissivity?E_b - Emissive Power of Blackbody?α - Absorptivity?G - Irradiation?

Net Heat Lost by Surface Example

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

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

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

33423.7464 = 50.3 \cdot ((0.95 \cdot 700) - (0.64 \cdot 0.8))

33423.7464W = 50.3m² \cdot ((0.95 \cdot 700W/m²) - (0.64 \cdot 0.8W/m²))

33423.7464 = 50.3 \cdot ((0.95 \cdot 700) - (0.64 \cdot 0.8))

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Net Heat Lost by Surface Solution

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

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

q = 50.3m² \cdot ((0.95 \cdot 700W/m²) - (0.64 \cdot 0.8W/m²))

Next Step Prepare to Evaluate

∴

q = 50.3 \cdot ((0.95 \cdot 700) - (0.64 \cdot 0.8))

LAST Step Evaluate

∴

q = 33423.7464W

Net Heat Lost by Surface 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

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

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

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

Absorptivity

Absorptivity is the fraction of incident radiation flux absorbed by the body.

Symbol: α

Measurement: NAUnit: Unitless

Note: Value should be between 0 to 1.

Formulas to find Absorptivity

Irradiation

Irradiation is the radiation flux incident on a surface from all directions.

Symbol: G

Measurement: Heat Flux DensityUnit: W/m²

Note: Value should be greater than 0.

Formulas to find Irradiation

Other Formulas to find Heat Transfer

Go Net Heat Lost by Surface given Diffuse Radiosity

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

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?

Net Heat Lost by Surface evaluator uses Heat Transfer = Area*((Emissivity*Emissive Power of Blackbody)-(Absorptivity*Irradiation)) to evaluate the Heat Transfer, The Net Heat Lost by Surface formula is defined as the function of area of heat transfer, emissivity, emissive power of blackbody, absorptivity and irradiation. Heat loss is the intentional or unintentional movement of heat from one material to another. This can happen through conduction, convection and radiation. Conduction often occurs when an insulated or uninsulated component is in direct contact with another component. Heat Transfer is denoted by q symbol.

How to evaluate Net Heat Lost by Surface using this online evaluator? To use this online evaluator for Net Heat Lost by Surface, enter Area (A), Emissivity (ε), Emissive Power of Blackbody (E_b), Absorptivity (α) & Irradiation (G) and hit the calculate button.

FAQs on Net Heat Lost by Surface

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

The formula of Net Heat Lost by Surface is expressed as Heat Transfer = Area*((Emissivity*Emissive Power of Blackbody)-(Absorptivity*Irradiation)). Here is an example- 33423.75 = 50.3*((0.95*700)-(0.64*0.8)).

How to calculate Net Heat Lost by Surface?

With Area (A), Emissivity (ε), Emissive Power of Blackbody (E_b), Absorptivity (α) & Irradiation (G) we can find Net Heat Lost by Surface using the formula - Heat Transfer = Area*((Emissivity*Emissive Power of Blackbody)-(Absorptivity*Irradiation)).

What are the other ways to Calculate Heat Transfer?

Here are the different ways to Calculate Heat Transfer-

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

Can the Net Heat Lost by Surface be negative?

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

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

Net Heat Lost by Surface 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 can be measured.

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Net Heat Lost by Surface Formula

​GoNet Heat Lost by Surface given Diffuse Radiosity Formula

Net Heat Lost by Surface Example

Net Heat Lost by Surface Solution

Net Heat Lost by Surface Formula Elements

Other Formulas to find Heat Transfer

Other formulas in Radiation Exchange with Specular Surfaces category

How to Evaluate Net Heat Lost by Surface?

FAQs on Net Heat Lost by Surface

Variable Name

GoNet Heat Lost by Surface given Diffuse Radiosity Formula