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Net Heat Exchange given Area 2 and Shape Factor 21 Formula

GoNet Heat Exchange given Area 1 and Shape Factor 12 Formula

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Net 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 1-2 = A 2 \cdot F 21 \cdot (E b1 - E b2)

Q_1-2 - Net Heat Transfer?A₂ - Surface Area of Body 2?F₂₁ - Radiation Shape Factor 21?E_b1 - Emissive Power of 1st Blackbody?E_b2 - Emissive Power of 2nd Blackbody?

Net Heat Exchange given Area 2 and Shape Factor 21 Example

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Here is how the Net Heat Exchange given Area 2 and Shape Factor 21 equation looks like with Values.

Here is how the Net Heat Exchange given Area 2 and Shape Factor 21 equation looks like with Units.

Here is how the Net Heat Exchange given Area 2 and Shape Factor 21 equation looks like.

3177.5 = 50 \cdot 0.41 \cdot (680 - 525)

3177.5W = 50m² \cdot 0.41 \cdot (680W/m² - 525W/m²)

3177.5 = 50 \cdot 0.41 \cdot (680 - 525)

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Net Heat Exchange given Area 2 and Shape Factor 21 Solution

Follow our step by step solution on how to calculate Net Heat Exchange given Area 2 and Shape Factor 21?

FIRST Step Consider the formula

Q 1-2 = A 2 \cdot F 21 \cdot (E b1 - E b2)

Next Step Substitute values of Variables

∴

Q 1-2 = 50m² \cdot 0.41 \cdot (680W/m² - 525W/m²)

Next Step Prepare to Evaluate

∴

Q 1-2 = 50 \cdot 0.41 \cdot (680 - 525)

LAST Step Evaluate

∴

Q 1-2 = 3177.5W

Net Heat Exchange given Area 2 and Shape Factor 21 Formula Elements

Variables

Net Heat Transfer

Net 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_1-2

Measurement: PowerUnit: W

Note: Value should be greater than 0.

Formulas to find Net Heat Transfer

Surface Area of Body 2

The Surface Area of Body 2 is the area of body 2 upon which the radiation takes place.

Symbol: A₂

Measurement: AreaUnit: m²

Note: Value can be positive or negative.

Formulas to find Surface Area of Body 2

Radiation Shape Factor 21

Radiation Shape Factor 21 is the fraction of radiation energy radiated by one surface which is incident on another surface when both surfaces are placed in a non-absorbing medium.

Symbol: F₂₁

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Radiation Shape Factor 21

Emissive Power of 1st Blackbody

Emissive Power of 1st 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_b1

Measurement: Heat Flux DensityUnit: W/m²

Note: Value should be greater than 0.

Formulas to find Emissive Power of 1st Blackbody

Emissive Power of 2nd Blackbody

Emissive Power of 2nd 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_b2

Measurement: Heat Flux DensityUnit: W/m²

Note: Value should be greater than 0.

Formulas to find Emissive Power of 2nd Blackbody

Other Formulas to find Net Heat Transfer

Go Net Heat Exchange given Area 1 and Shape Factor 12

Q 1-2 = A 1 \cdot F 12 \cdot (E b1 - E b2)

Other formulas in Radiation Heat Transfer category

Go Absorptivity given Reflectivity and Transmissivity

α = 1 - ρ - 𝜏

Go Area of Surface 1 given Area 2 and Radiation Shape Factor for Both Surfaces

A 1 = A 2 \cdot (\frac{F 21}{F 12})

Go Area of Surface 2 given Area 1 and Radiation Shape Factor for Both Surfaces

A 2 = A 1 \cdot (\frac{F 12}{F 21})

Go Emissive Power of Blackbody

E b = [Stefan-BoltZ] \cdot (T^{4})

How to Evaluate Net Heat Exchange given Area 2 and Shape Factor 21?

Net Heat Exchange given Area 2 and Shape Factor 21 evaluator uses Net Heat Transfer = Surface Area of Body 2*Radiation Shape Factor 21*(Emissive Power of 1st Blackbody-Emissive Power of 2nd Blackbody) to evaluate the Net Heat Transfer, The Net Heat Exchange given Area 2 and Shape Factor 21 formula is defined as the product of surface area, shape factor and the difference between emissive power of both the blackbodies. Net Heat Transfer is denoted by Q_1-2 symbol.

How to evaluate Net Heat Exchange given Area 2 and Shape Factor 21 using this online evaluator? To use this online evaluator for Net Heat Exchange given Area 2 and Shape Factor 21, enter Surface Area of Body 2 (A₂), Radiation Shape Factor 21 (F₂₁), Emissive Power of 1st Blackbody (E_b1) & Emissive Power of 2nd Blackbody (E_b2) and hit the calculate button.

FAQs on Net Heat Exchange given Area 2 and Shape Factor 21

What is the formula to find Net Heat Exchange given Area 2 and Shape Factor 21?

The formula of Net Heat Exchange given Area 2 and Shape Factor 21 is expressed as Net Heat Transfer = Surface Area of Body 2*Radiation Shape Factor 21*(Emissive Power of 1st Blackbody-Emissive Power of 2nd Blackbody). Here is an example- 3177.5 = 50*0.41*(680-525).

How to calculate Net Heat Exchange given Area 2 and Shape Factor 21?

With Surface Area of Body 2 (A₂), Radiation Shape Factor 21 (F₂₁), Emissive Power of 1st Blackbody (E_b1) & Emissive Power of 2nd Blackbody (E_b2) we can find Net Heat Exchange given Area 2 and Shape Factor 21 using the formula - Net Heat Transfer = Surface Area of Body 2*Radiation Shape Factor 21*(Emissive Power of 1st Blackbody-Emissive Power of 2nd Blackbody).

What are the other ways to Calculate Net Heat Transfer?

Here are the different ways to Calculate Net Heat Transfer-

Net Heat Transfer=Surface Area of Body 1*Radiation Shape Factor 12*(Emissive Power of 1st Blackbody-Emissive Power of 2nd Blackbody)

Can the Net Heat Exchange given Area 2 and Shape Factor 21 be negative?

No, the Net Heat Exchange given Area 2 and Shape Factor 21, measured in Power cannot be negative.

Which unit is used to measure Net Heat Exchange given Area 2 and Shape Factor 21?

Net Heat Exchange given Area 2 and Shape Factor 21 is usually measured using the Watt[W] for Power. Kilowatt[W], Milliwatt[W], Microwatt[W] are the few other units in which Net Heat Exchange given Area 2 and Shape Factor 21 can be measured.

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Net Heat Exchange given Area 2 and Shape Factor 21 Formula

​GoNet Heat Exchange given Area 1 and Shape Factor 12 Formula

Net Heat Exchange given Area 2 and Shape Factor 21 Example

Net Heat Exchange given Area 2 and Shape Factor 21 Solution

Net Heat Exchange given Area 2 and Shape Factor 21 Formula Elements

Other Formulas to find Net Heat Transfer

Other formulas in Radiation Heat Transfer category

How to Evaluate Net Heat Exchange given Area 2 and Shape Factor 21?

FAQs on Net Heat Exchange given Area 2 and Shape Factor 21

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GoNet Heat Exchange given Area 1 and Shape Factor 12 Formula