Heat transfer coefficient in film boiling Calculator

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Convection

Basics of HMT

Conduction

Convective Mass Transfer

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✖Heat Transfer Coefficient by Convection is the heat transferred per unit area per kelvin.ⓘ Heat Transfer Coefficient by Convection [h_c]			+10% -10%
✖Heat Transfer Coefficient by Radiation is the heat transferred per unit area per kelvin.ⓘ Heat Transfer Coefficient by Radiation [h_r]			+10% -10%

✖Heat Transfer Coefficient by Boiling is the heat transferred per unit area per kelvin.ⓘ Heat transfer coefficient in film boiling [h]

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Formula

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Heat transfer coefficient in film boiling

Formula

`"h" = "h"_{"c"}+0.75*"h"_{"r"}`

Example

`"2.275W/m²*K"="1.15W/m²*K"+0.75*"1.5W/m²*K"`

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Heat transfer coefficient in film boiling Solution

STEP 0: Pre-Calculation Summary

Formula Used

Heat Transfer Coefficient by Boiling = Heat Transfer Coefficient by Convection+0.75*Heat Transfer Coefficient by Radiation
h = h_c+0.75*h_r
This formula uses 3 Variables

Variables Used

Heat Transfer Coefficient by Boiling - (Measured in Watt per Square Meter per Kelvin) - Heat Transfer Coefficient by Boiling is the heat transferred per unit area per kelvin.
Heat Transfer Coefficient by Convection - (Measured in Watt per Square Meter per Kelvin) - Heat Transfer Coefficient by Convection is the heat transferred per unit area per kelvin.
Heat Transfer Coefficient by Radiation - (Measured in Watt per Square Meter per Kelvin) - Heat Transfer Coefficient by Radiation is the heat transferred per unit area per kelvin.

STEP 1: Convert Input(s) to Base Unit

Heat Transfer Coefficient by Convection: 1.15 Watt per Square Meter per Kelvin --> 1.15 Watt per Square Meter per Kelvin No Conversion Required
Heat Transfer Coefficient by Radiation: 1.5 Watt per Square Meter per Kelvin --> 1.5 Watt per Square Meter per Kelvin No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

h = h_c+0.75*h_r --> 1.15+0.75*1.5

Evaluating ... ...

h = 2.275

STEP 3: Convert Result to Output's Unit

2.275 Watt per Square Meter per Kelvin --> No Conversion Required

FINAL ANSWER

2.275 Watt per Square Meter per Kelvin <-- Heat Transfer Coefficient by Boiling

(Calculation completed in 00.020 seconds)

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Shri Madhwa Vadiraja Institute of Technology and Management (SMVITM), Udupi

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< 11 Boiling Calculators

Maximum heat flux to nucleate pool boiling

Go Maximum Heat Flux = (1.464*10^-9)*(((Specific Heat of Liquid*(Thermal Conductivity of Liquid^2)*(Density of Liquid^0.5)*(Density of Liquid-Density of Vapour))/(Density of Vapour*Change in Enthalpy of Vaporization*Dynamic Viscosity of Fluid^0.5))^0.5)*(((Change in Enthalpy of Vaporization*Density of Vapour*Excess Temperature)/(Surface Tension*Temperature of Fluid))^2.3)

Heat transfer coefficient by convection for stable film boiling

Go Heat Transfer Coefficient by Convection = 0.62*((Thermal Conductivity of Vapor^3*Density of Vapour*[g]*(Density of Liquid-Density of Vapour)*(Change in Enthalpy of Vaporization+(0.68*Specific Heat of Vapour)*Excess Temperature))/(Dynamic Viscosity of Vapour*Diameter*Excess Temperature))^0.25

Heat flux to nucleate pool boiling

Go Heat Flux = Dynamic Viscosity of Fluid*Change in Enthalpy of Vaporization*((([g]*(Density of Liquid-Density of Vapour))/(Surface Tension))^0.5)*(((Specific Heat of Liquid*Excess Temperature)/(Constant in nucleate boiling*Change in Enthalpy of Vaporization*(Prandtl Number)^1.7))^3.0)

Enthalpy of evaporation to nucleate pool boiling

Go Change in Enthalpy of Vaporization = ((1/Heat Flux)*Dynamic Viscosity of Fluid*(([g]*(Density of Liquid-Density of Vapour))/(Surface Tension))^0.5*((Specific Heat of Liquid*Excess Temperature)/(Constant in nucleate boiling*(Prandtl Number)^1.7))^3)^0.5

Enthalpy of evaporation given critical heat flux

Go Change in Enthalpy of Vaporization = Critical Heat Flux/(0.18*Density of Vapour*(((Surface Tension*[g]*(Density of Liquid-Density of Vapour))/(Density of Vapour^2))^0.25))

Critical heat flux to nucleate pool boiling

Go Critical Heat Flux = 0.18*Change in Enthalpy of Vaporization*Density of Vapour*((Surface Tension*[g]*(Density of Liquid-Density of Vapour))/(Density of Vapour^2))^0.25

Heat transfer coefficient due to radiation for horizontal tubes

Go Heat Transfer Coefficient by Radiation = [Stefan-BoltZ]*Emissivity*(((Wall Temperature^4)-(Saturation Temperature^4))/(Wall Temperature-Saturation Temperature))

Emissivity given heat transfer coefficient by radiation

Go Emissivity = Heat Transfer Coefficient by Radiation/([Stefan-BoltZ]*((Wall Temperature^4-Saturation Temperature^4)/(Wall Temperature-Saturation Temperature)))

Heat transfer coefficient by radiation

Go Heat Transfer Coefficient by Radiation = (Heat Transfer Coefficient by Boiling-Heat Transfer Coefficient by Convection)/0.75

Heat transfer coefficient in film boiling

Go Heat Transfer Coefficient by Boiling = Heat Transfer Coefficient by Convection+0.75*Heat Transfer Coefficient by Radiation

Heat transfer coefficient for convection

Go Heat Transfer Coefficient by Convection = Heat Transfer Coefficient by Boiling-0.75*Heat Transfer Coefficient by Radiation

Heat transfer coefficient in film boiling Formula

Heat Transfer Coefficient by Boiling = Heat Transfer Coefficient by Convection+0.75*Heat Transfer Coefficient by Radiation
h = h_c+0.75*h_r

What is boiling

Boiling is the rapid vaporization of a liquid, which occurs when a liquid is heated to its boiling point, the temperature at which the vapour pressure of the liquid is equal to the pressure exerted on the liquid by the surrounding atmosphere.

How to Calculate Heat transfer coefficient in film boiling?

Heat transfer coefficient in film boiling calculator uses Heat Transfer Coefficient by Boiling = Heat Transfer Coefficient by Convection+0.75*Heat Transfer Coefficient by Radiation to calculate the Heat Transfer Coefficient by Boiling, The Heat transfer coefficient in film boiling formula is defined as the heat transferred per unit area per kelvin. Heat Transfer Coefficient by Boiling is denoted by h symbol.

How to calculate Heat transfer coefficient in film boiling using this online calculator? To use this online calculator for Heat transfer coefficient in film boiling, enter Heat Transfer Coefficient by Convection (h_c) & Heat Transfer Coefficient by Radiation (h_r) and hit the calculate button. Here is how the Heat transfer coefficient in film boiling calculation can be explained with given input values -> 7.77867 = 1.15+0.75*1.5.

FAQ

What is Heat transfer coefficient in film boiling?

The Heat transfer coefficient in film boiling formula is defined as the heat transferred per unit area per kelvin and is represented as h = h_c+0.75*h_r or Heat Transfer Coefficient by Boiling = Heat Transfer Coefficient by Convection+0.75*Heat Transfer Coefficient by Radiation. Heat Transfer Coefficient by Convection is the heat transferred per unit area per kelvin & Heat Transfer Coefficient by Radiation is the heat transferred per unit area per kelvin.

How to calculate Heat transfer coefficient in film boiling?

The Heat transfer coefficient in film boiling formula is defined as the heat transferred per unit area per kelvin is calculated using Heat Transfer Coefficient by Boiling = Heat Transfer Coefficient by Convection+0.75*Heat Transfer Coefficient by Radiation. To calculate Heat transfer coefficient in film boiling, you need Heat Transfer Coefficient by Convection (h_c) & Heat Transfer Coefficient by Radiation (h_r). With our tool, you need to enter the respective value for Heat Transfer Coefficient by Convection & Heat Transfer Coefficient by Radiation and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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