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Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D Formula

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Average Heat Transfer Coefficient is equal to the heat flow (Q) across the heat-transfer surface divided by the average temperature (Δt) and the area of the heat-transfer surface (A). Check FAQs

h ̅ = 0.725 \cdot {(\frac{(k^{3}) \cdot ({ρ f}^{2}) \cdot g \cdot h fg}{N \cdot d t \cdot μ f \cdot ΔT})}^{\frac{1}{4}}

h ̅ - Average Heat Transfer Coefficient?k - Thermal Conductivity?ρ_f - Density of Liquid Condensate?g - Acceleration due to Gravity?h_fg - Latent Heat of Vaporization?N - Number of Tubes?d_t - Diameter of Tube?μ_f - Viscosity of Film?ΔT - Temperature Difference?

Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D Example

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Here is how the Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D equation looks like with Values.

Here is how the Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D equation looks like with Units.

Here is how the Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D equation looks like.

390.5305 = 0.725 \cdot {(\frac{({10.18}^{3}) \cdot (10^{2}) \cdot 9.8 \cdot 2260}{11 \cdot 3000 \cdot 0.029 \cdot 29})}^{\frac{1}{4}}

390.5305W/m²*K = 0.725 \cdot {(\frac{({10.18W/(m*K)}^{3}) \cdot ({10kg/m³}^{2}) \cdot 9.8m/s² \cdot 2260kJ/kg}{11 \cdot 3000mm \cdot 0.029N*s/m² \cdot 29K})}^{\frac{1}{4}}

390.5305 = 0.725 \cdot {(\frac{({10.18}^{3}) \cdot (10^{2}) \cdot 9.8 \cdot 2260}{11 \cdot 3000 \cdot 0.029 \cdot 29})}^{\frac{1}{4}}

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Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D Solution

Follow our step by step solution on how to calculate Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D?

FIRST Step Consider the formula

h ̅ = 0.725 \cdot {(\frac{(k^{3}) \cdot ({ρ f}^{2}) \cdot g \cdot h fg}{N \cdot d t \cdot μ f \cdot ΔT})}^{\frac{1}{4}}

Next Step Substitute values of Variables

∴

h ̅ = 0.725 \cdot {(\frac{({10.18W/(m*K)}^{3}) \cdot ({10kg/m³}^{2}) \cdot 9.8m/s² \cdot 2260kJ/kg}{11 \cdot 3000mm \cdot 0.029N*s/m² \cdot 29K})}^{\frac{1}{4}}

Next Step Convert Units

∴

h ̅ = 0.725 \cdot {(\frac{({10.18W/(m*K)}^{3}) \cdot ({10kg/m³}^{2}) \cdot 9.8m/s² \cdot 2.3E+6J/kg}{11 \cdot 3m \cdot 0.029Pa*s \cdot 29K})}^{\frac{1}{4}}

Next Step Prepare to Evaluate

∴

h ̅ = 0.725 \cdot {(\frac{({10.18}^{3}) \cdot (10^{2}) \cdot 9.8 \cdot 2.3E+6}{11 \cdot 3 \cdot 0.029 \cdot 29})}^{\frac{1}{4}}

Next Step Evaluate

∴

h ̅ = 390.530524644415W/m²*K

LAST Step Rounding Answer

∴

h ̅ = 390.5305W/m²*K

Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D Formula Elements

Variables

Average Heat Transfer Coefficient

Average Heat Transfer Coefficient is equal to the heat flow (Q) across the heat-transfer surface divided by the average temperature (Δt) and the area of the heat-transfer surface (A).

Symbol: h ̅

Measurement: Heat Transfer CoefficientUnit: W/m²*K

Note: Value should be greater than 0.

Formulas to find Average Heat Transfer Coefficient

Thermal Conductivity

Thermal Conductivity is rate of heat passes through specified material, expressed as amount of heat flows per unit time through a unit area with a temperature gradient of one degree per unit distance.

Symbol: k

Measurement: Thermal ConductivityUnit: W/(m*K)

Note: Value should be greater than 0.

Formulas to find Thermal Conductivity

Density of Liquid Condensate

The Density of Liquid Condensate is the mass of a unit volume of the liquid condensate.

Symbol: ρ_f

Measurement: DensityUnit: kg/m³

Note: Value can be positive or negative.

Formulas to find Density of Liquid Condensate

Acceleration due to Gravity

Acceleration due to Gravity is acceleration gained by an object because of gravitational force.

Symbol: g

Measurement: AccelerationUnit: m/s²

Note: Value should be greater than 0.

Formulas to find Acceleration due to Gravity

Latent Heat of Vaporization

Latent heat of vaporization is defined as the heat required to change one mole of liquid at its boiling point under standard atmospheric pressure.

Symbol: h_fg

Measurement: Latent HeatUnit: kJ/kg

Note: Value should be greater than 0.

Formulas to find Latent Heat of Vaporization

Number of Tubes

Number of tubes is the total count of the tubes that fluid passes through in a heat exchanger.

Symbol: N

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Number of Tubes

Diameter of Tube

Diameter of tube is defined as the OUTSIDE DIAMETER (O.D.), specified in inches (e.g., 1.250) or fraction of an inch (eg. 1-1/4″).

Symbol: d_t

Measurement: LengthUnit: mm

Note: Value should be greater than 0.

Formulas to find Diameter of Tube

Viscosity of Film

Viscosity of Film is a measure of its resistance to deformation at a given rate.

Symbol: μ_f

Measurement: Dynamic ViscosityUnit: N*s/m²

Note: Value should be greater than 0.

Formulas to find Viscosity of Film

Temperature Difference

Temperature Difference is the measure of the hotness or the coldness of an object.

Symbol: ΔT

Measurement: Temperature DifferenceUnit: K

Note: Value can be positive or negative.

Formulas to find Temperature Difference

Other formulas in Heat Transfer category

Go Heat Rejection Factor

HRF = \frac{R E + W}{R E}

Go Heat Rejection Factor given COP

HRF = 1 + (\frac{1}{COP r})

How to Evaluate Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D?

Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D evaluator uses Average Heat Transfer Coefficient = 0.725*(((Thermal Conductivity^3)*(Density of Liquid Condensate^2)*Acceleration due to Gravity*Latent Heat of Vaporization)/(Number of Tubes*Diameter of Tube*Viscosity of Film*Temperature Difference))^(1/4) to evaluate the Average Heat Transfer Coefficient, Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D formula is defined as a measure of the rate of heat transfer between the condensing vapour and the tube surface, influenced by factors such as vapour properties, tube diameter, and temperature difference. Average Heat Transfer Coefficient is denoted by h ̅ symbol.

How to evaluate Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D using this online evaluator? To use this online evaluator for Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D, enter Thermal Conductivity (k), Density of Liquid Condensate (ρ_f), Acceleration due to Gravity (g), Latent Heat of Vaporization (h_fg), Number of Tubes (N), Diameter of Tube (d_t), Viscosity of Film (μ_f) & Temperature Difference (ΔT) and hit the calculate button.

FAQs on Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D

What is the formula to find Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D?

The formula of Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D is expressed as Average Heat Transfer Coefficient = 0.725*(((Thermal Conductivity^3)*(Density of Liquid Condensate^2)*Acceleration due to Gravity*Latent Heat of Vaporization)/(Number of Tubes*Diameter of Tube*Viscosity of Film*Temperature Difference))^(1/4). Here is an example- 390.5305 = 0.725*(((10.18^3)*(10^2)*9.8*2260000)/(11*3*0.029*29))^(1/4).

How to calculate Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D?

With Thermal Conductivity (k), Density of Liquid Condensate (ρ_f), Acceleration due to Gravity (g), Latent Heat of Vaporization (h_fg), Number of Tubes (N), Diameter of Tube (d_t), Viscosity of Film (μ_f) & Temperature Difference (ΔT) we can find Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D using the formula - Average Heat Transfer Coefficient = 0.725*(((Thermal Conductivity^3)*(Density of Liquid Condensate^2)*Acceleration due to Gravity*Latent Heat of Vaporization)/(Number of Tubes*Diameter of Tube*Viscosity of Film*Temperature Difference))^(1/4).

Can the Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D be negative?

No, the Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D, measured in Heat Transfer Coefficient cannot be negative.

Which unit is used to measure Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D?

Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D 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 Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D can be measured.

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Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D Formula

Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D Example

Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D Solution

Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D Formula Elements

Other formulas in Heat Transfer category

How to Evaluate Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D?

FAQs on Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D

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