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Effective heat transfer coefficient Formula

GoEffective heat transfer coefficient for variation Formula

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Effective Heat Transfer Coefficient is the rate of heat transfer between the solar air heater and the surrounding air, affecting its overall performance. Check FAQs

h e = 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?h_r - Equivalent Radiative Heat Transfer Coefficient?h_fb - Convective Heat Transfer Coeff of Solar Bottom?

Effective heat transfer coefficient Example

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

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

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

5.3527 = 4.5 + \frac{1.1624 \cdot 3.2}{1.1624 + 3.2}

5.3527W/m²*K = 4.5W/m²*K + \frac{1.1624W/m²*K \cdot 3.2W/m²*K}{1.1624W/m²*K + 3.2W/m²*K}

5.3527 = 4.5 + \frac{1.1624 \cdot 3.2}{1.1624 + 3.2}

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Effective heat transfer coefficient Solution

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

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

h e = 4.5W/m²*K + \frac{1.1624W/m²*K \cdot 3.2W/m²*K}{1.1624W/m²*K + 3.2W/m²*K}

Next Step Prepare to Evaluate

∴

h e = 4.5 + \frac{1.1624 \cdot 3.2}{1.1624 + 3.2}

Next Step Evaluate

∴

h e = 5.35268063184153W/m²*K

LAST Step Rounding Answer

∴

h e = 5.3527W/m²*K

Effective heat transfer coefficient Formula Elements

Variables

Effective Heat Transfer Coefficient

Effective Heat Transfer Coefficient is the rate of heat transfer between the solar air heater and the surrounding air, affecting its overall performance.

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 rate of heat transfer between the solar air heater and the surrounding air.

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

Equivalent Radiative Heat Transfer Coefficient

Equivalent Radiative Heat Transfer Coefficient is the rate of heat transfer between the solar air heater and its surroundings through radiation.

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 rate of heat transfer between the solar absorber plate and the surrounding air in a solar air heater.

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 for variation

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}

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}

Go Incident flux when flow is between Cover and Absorber plate

S flux = h fp \cdot (T pm - T fi) + (h r \cdot (T pm - T c)) + (U b \cdot (T pm - T a))

Go Mean temperature of plate below

T bm = \frac{h r \cdot T pm + h fb \cdot T f}{h r + h fb}

How to Evaluate Effective heat transfer coefficient?

Effective heat transfer coefficient evaluator uses 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) to evaluate the Effective Heat Transfer Coefficient, Effective heat transfer coefficient formula is defined as a measure of the overall heat transfer ability of a solar air heater, taking into account the heat transfer coefficients of the fluid and the radiative heat transfer between the absorber plate and the surroundings. Effective Heat Transfer Coefficient is denoted by h_e symbol.

How to evaluate Effective heat transfer coefficient using this online evaluator? To use this online evaluator for Effective heat transfer coefficient, enter Convective Heat Transfer Coeff of Solar (h_fp), 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

What is the formula to find Effective heat transfer coefficient?

The formula of Effective heat transfer coefficient is expressed as 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). Here is an example- 5.352681 = 4.5+(1.162423*3.2)/(1.162423+3.2).

How to calculate Effective heat transfer coefficient?

With Convective Heat Transfer Coeff of Solar (h_fp), Equivalent Radiative Heat Transfer Coefficient (h_r) & Convective Heat Transfer Coeff of Solar Bottom (h_fb) we can find Effective heat transfer coefficient using the formula - 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).

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*(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)

Can the Effective heat transfer coefficient be negative?

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

Which unit is used to measure Effective heat transfer coefficient?

Effective heat transfer coefficient 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 can be measured.

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: Value
: Unit

Effective heat transfer coefficient Formula

​GoEffective heat transfer coefficient for variation Formula

Effective heat transfer coefficient Example

Effective heat transfer coefficient Solution

Effective heat transfer coefficient Formula Elements

Other Formulas to find Effective Heat Transfer Coefficient

Other formulas in Solar Air Heater category

How to Evaluate Effective heat transfer coefficient?

FAQs on Effective heat transfer coefficient

Variable Name

GoEffective heat transfer coefficient for variation Formula