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Effective heat transfer coefficient for variation Formula

GoEffective heat transfer coefficient Formula

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Effective heat transfer coefficient is defined as the heat transfer coefficient between the absorber plate and the air stream. Check FAQs

h e = h fp \cdot (1 + \frac{2 \cdot L f \cdot Φ f \cdot h ff}{W \cdot h fp}) + \frac{h r \cdot h fb}{h r + h fb}

h_e - Effective heat transfer coefficient?h_fp - Convective heat transfer Coeff of solar?L_f - Fin height?Φ_f - Fin effectiveness?h_ff - Convective heat transfer Coeff of solar fin?W - Distance between fins?h_r - Equivalent radiative heat transfer coefficient?h_fb - Convective heat transfer Coeff of solar bottom?

Effective heat transfer coefficient for variation Example

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Here is how the Effective heat transfer coefficient for variation equation looks like with Values.

Here is how the Effective heat transfer coefficient for variation equation looks like with Units.

Here is how the Effective heat transfer coefficient for variation equation looks like.

5.292 = 4.5 \cdot (1 + \frac{2 \cdot 12 \cdot 0.1 \cdot 1.9}{30 \cdot 4.5}) + \frac{0.8 \cdot 3.2}{0.8 + 3.2}

5.292W/m²*K = 4.5W/m²*K \cdot (1 + \frac{2 \cdot 12mm \cdot 0.1 \cdot 1.9W/m²*K}{30mm \cdot 4.5W/m²*K}) + \frac{0.8W/m²*K \cdot 3.2W/m²*K}{0.8W/m²*K + 3.2W/m²*K}

5.292 = 4.5 \cdot (1 + \frac{2 \cdot 12 \cdot 0.1 \cdot 1.9}{30 \cdot 4.5}) + \frac{0.8 \cdot 3.2}{0.8 + 3.2}

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Effective heat transfer coefficient for variation Solution

Follow our step by step solution on how to calculate Effective heat transfer coefficient for variation?

FIRST Step Consider the formula

h e = h fp \cdot (1 + \frac{2 \cdot L f \cdot Φ f \cdot h ff}{W \cdot h fp}) + \frac{h r \cdot h fb}{h r + h fb}

Next Step Substitute values of Variables

∴

h e = 4.5W/m²*K \cdot (1 + \frac{2 \cdot 12mm \cdot 0.1 \cdot 1.9W/m²*K}{30mm \cdot 4.5W/m²*K}) + \frac{0.8W/m²*K \cdot 3.2W/m²*K}{0.8W/m²*K + 3.2W/m²*K}

Next Step Convert Units

∴

h e = 4.5W/m²*K \cdot (1 + \frac{2 \cdot 0.012m \cdot 0.1 \cdot 1.9W/m²*K}{0.03m \cdot 4.5W/m²*K}) + \frac{0.8W/m²*K \cdot 3.2W/m²*K}{0.8W/m²*K + 3.2W/m²*K}

Next Step Prepare to Evaluate

∴

h e = 4.5 \cdot (1 + \frac{2 \cdot 0.012 \cdot 0.1 \cdot 1.9}{0.03 \cdot 4.5}) + \frac{0.8 \cdot 3.2}{0.8 + 3.2}

LAST Step Evaluate

∴

h e = 5.292W/m²*K

Effective heat transfer coefficient for variation Formula Elements

Variables

Effective heat transfer coefficient

Effective heat transfer coefficient is defined as the heat transfer coefficient between the absorber plate and the air stream.

Symbol: h_e

Measurement: Heat Transfer CoefficientUnit: W/m²*K

Note: Value can be positive or negative.

Formulas to find Effective heat transfer coefficient

Convective heat transfer Coeff of solar

Convective heat transfer Coeff of solar is the heat transfer coefficient between the absorber plate and the air stream.

Symbol: h_fp

Measurement: Heat Transfer CoefficientUnit: W/m²*K

Note: Value should be greater than 0.

Formulas to find Convective heat transfer Coeff of solar

Fin height

Fin height is defined as the height of fin from base to top.

Symbol: L_f

Measurement: LengthUnit: mm

Note: Value should be greater than 0.

Formulas to find Fin height

Fin effectiveness

Fin effectiveness is the ratio of the rate of heat transfer by use of fin to the rate of heat transfer without fin.

Symbol: Φ_f

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Fin effectiveness

Convective heat transfer Coeff of solar fin

Convective heat transfer Coeff of solar fin is defined as the heat transfer coefficient between the fin surface and the air stream.

Symbol: h_ff

Measurement: Heat Transfer CoefficientUnit: W/m²*K

Note: Value can be positive or negative.

Formulas to find Convective heat transfer Coeff of solar fin

Distance between fins

Distance between fins is defined as the distance between two fins taken from their centre.

Symbol: W

Measurement: LengthUnit: mm

Note: Value should be greater than 0.

Formulas to find Distance between fins

Equivalent radiative heat transfer coefficient

Equivalent radiative heat transfer coefficient is defined as the overall heat transfer coefficient, which tells how well heat is conducted through over a series of resistant mediums.

Symbol: h_r

Measurement: Heat Transfer CoefficientUnit: W/m²*K

Note: Value can be positive or negative.

Formulas to find Equivalent radiative heat transfer coefficient

Convective heat transfer Coeff of solar bottom

Convective heat transfer Coeff of solar bottom is the heat transfer coefficient between the bottom plate and the air stream.

Symbol: h_fb

Measurement: Heat Transfer CoefficientUnit: W/m²*K

Note: Value should be greater than 0.

Formulas to find Convective heat transfer Coeff of solar bottom

Other Formulas to find Effective heat transfer coefficient

Go Effective heat transfer coefficient

h e = h fp + \frac{h r \cdot h fb}{h r + h fb}

Other formulas in Solar Air Heater category

Go Equivalent radiative heat transfer coefficient

h r = \frac{4 \cdot [Stefan-BoltZ] \cdot {(T pm + T bm)}^{3}}{(\frac{1}{ε p}) + (\frac{1}{ε b}) - 1 \cdot 8}

Go Collector efficiency factor

F′ = {(1 + \frac{U l}{h e})}^{- 1}

How to Evaluate Effective heat transfer coefficient for variation?

Effective heat transfer coefficient for variation evaluator uses Effective heat transfer coefficient = Convective heat transfer Coeff of solar*(1+(2*Fin height*Fin effectiveness*Convective heat transfer Coeff of solar fin)/(Distance between fins*Convective heat transfer Coeff of solar))+(Equivalent radiative heat transfer coefficient*Convective heat transfer Coeff of solar bottom)/(Equivalent radiative heat transfer coefficient+Convective heat transfer Coeff of solar bottom) to evaluate the Effective heat transfer coefficient, The Effective heat transfer coefficient for variation formula is defined as the overall heat transfer coefficient, which tells how well heat is conducted through over a series of resistant mediums. Effective heat transfer coefficient is denoted by h_e symbol.

How to evaluate Effective heat transfer coefficient for variation using this online evaluator? To use this online evaluator for Effective heat transfer coefficient for variation, enter Convective heat transfer Coeff of solar (h_fp), Fin height (L_f), Fin effectiveness (Φ_f), Convective heat transfer Coeff of solar fin (h_ff), Distance between fins (W), Equivalent radiative heat transfer coefficient (h_r) & Convective heat transfer Coeff of solar bottom (h_fb) and hit the calculate button.

FAQs on Effective heat transfer coefficient for variation

What is the formula to find Effective heat transfer coefficient for variation?

The formula of Effective heat transfer coefficient for variation is expressed as Effective heat transfer coefficient = Convective heat transfer Coeff of solar*(1+(2*Fin height*Fin effectiveness*Convective heat transfer Coeff of solar fin)/(Distance between fins*Convective heat transfer Coeff of solar))+(Equivalent radiative heat transfer coefficient*Convective heat transfer Coeff of solar bottom)/(Equivalent radiative heat transfer coefficient+Convective heat transfer Coeff of solar bottom). Here is an example- 5.292 = 4.5*(1+(2*0.012*0.1*1.9)/(0.03*4.5))+(0.8*3.2)/(0.8+3.2).

How to calculate Effective heat transfer coefficient for variation?

With Convective heat transfer Coeff of solar (h_fp), Fin height (L_f), Fin effectiveness (Φ_f), Convective heat transfer Coeff of solar fin (h_ff), Distance between fins (W), Equivalent radiative heat transfer coefficient (h_r) & Convective heat transfer Coeff of solar bottom (h_fb) we can find Effective heat transfer coefficient for variation using the formula - Effective heat transfer coefficient = Convective heat transfer Coeff of solar*(1+(2*Fin height*Fin effectiveness*Convective heat transfer Coeff of solar fin)/(Distance between fins*Convective heat transfer Coeff of solar))+(Equivalent radiative heat transfer coefficient*Convective heat transfer Coeff of solar bottom)/(Equivalent radiative heat transfer coefficient+Convective heat transfer Coeff of solar bottom).

What are the other ways to Calculate Effective heat transfer coefficient?

Here are the different ways to Calculate Effective heat transfer coefficient-

Effective heat transfer coefficient=Convective heat transfer Coeff of solar+(Equivalent radiative heat transfer coefficient*Convective heat transfer Coeff of solar bottom)/(Equivalent radiative heat transfer coefficient+Convective heat transfer Coeff of solar bottom)

Can the Effective heat transfer coefficient for variation be negative?

Yes, the Effective heat transfer coefficient for variation, measured in Heat Transfer Coefficient can be negative.

Which unit is used to measure Effective heat transfer coefficient for variation?

Effective heat transfer coefficient for variation is usually measured using the Watt per Square Meter per Kelvin[W/m²*K] for Heat Transfer Coefficient. Watt per Square Meter per Celcius[W/m²*K], Joule per Second per Square Meter per Kelvin[W/m²*K], Kilocalorie (IT) per Hour per Square Foot per Celcius[W/m²*K] are the few other units in which Effective heat transfer coefficient for variation can be measured.

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Effective heat transfer coefficient for variation Formula

​GoEffective heat transfer coefficient Formula

Effective heat transfer coefficient for variation Example

Effective heat transfer coefficient for variation Solution

Effective heat transfer coefficient for variation Formula Elements

Other Formulas to find Effective heat transfer coefficient

Other formulas in Solar Air Heater category

How to Evaluate Effective heat transfer coefficient for variation?

FAQs on Effective heat transfer coefficient for variation

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GoEffective heat transfer coefficient Formula