Gas phase heat transfer coefficient in dehumidification Calculator

⤿

Humidification

Basics of HMT

Conduction

Convection

Convective Mass Transfer

✖Liquid Phase Heat Transfer Coefficient is the heat transfer in liquid per unit area in kelvin.ⓘ Liquid Phase Heat Transfer Coefficient [h1]			+10% -10%
✖Inside Temperature is the temperature of air present inside.ⓘ Inside Temperature [t_i]			+10% -10%
✖Liquid layer temperature is defined as the temperature of the flowing liquid layer in dehumidification.ⓘ Liquid layer temperature [Tl]			+10% -10%
✖Enthalpy of evaporation is the amount of energy (enthalpy) that must be added to a liquid substance to transform a quantity of that substance into a gas.ⓘ Enthalpy of Evaporation [hfg]			+10% -10%
✖Gas phase mass transfer coefficient is a diffusion rate constant that relates the mass transfer rate, mass transfer area, and concentration change as driving force.ⓘ Gas Phase Mass Transfer Coefficient [k_y]			+10% -10%
✖Absolute Humidity of Air(tg) at the initial air temperature.ⓘ Absolute Humidity of Air(tg) [Yg]			+10% -10%
✖Absolute humidity (ti) is the quality of water vapor in the wet air of unit volume at temperature ti.ⓘ Absolute Humidity (ti) [Yi]			+10% -10%
✖Bulk gas temperature is adiabatic mixing of the gas from a given cross section of duct will result in some equilibrium temperature that accurately reflects average temperature of the moving fluid.ⓘ Bulk Gas Temperature [Tg]			+10% -10%

✖Gas Phase Heat Transfer Coefficient is the heat transfer in gas per unit area in kelvin.ⓘ Gas phase heat transfer coefficient in dehumidification [hg]

⎘ Copy

👎

Formula

✖

Gas phase heat transfer coefficient in dehumidification

Formula

`"hg" = (("h1"*("t"_{"i"}-"Tl"))-("hfg"*"k"_{"y"}*("Yg"-"Yi")))/("Tg"-"t"_{"i"})`

Example

`"-1125.163636W/m²*K"=(("10.8W/m²*K"*("353K"-"20"))-("90J/kg*K"*"90mol/s*m²"*("16"-"50.7")))/("100"-"353K")`

Calculator

LaTeX

Reset

👍

Download Heat and Mass Transfer Formula PDF PDF Image

Gas phase heat transfer coefficient in dehumidification Solution

STEP 0: Pre-Calculation Summary

Formula Used

Gas Phase Heat Transfer Coefficient = ((Liquid Phase Heat Transfer Coefficient*(Inside Temperature-Liquid layer temperature))-(Enthalpy of Evaporation*Gas Phase Mass Transfer Coefficient*(Absolute Humidity of Air(tg)-Absolute Humidity (ti))))/(Bulk Gas Temperature-Inside Temperature)
hg = ((h1*(t_i-Tl))-(hfg*k_y*(Yg-Yi)))/(Tg-t_i)
This formula uses 9 Variables

Variables Used

Gas Phase Heat Transfer Coefficient - (Measured in Watt per Square Meter per Kelvin) - Gas Phase Heat Transfer Coefficient is the heat transfer in gas per unit area in kelvin.
Liquid Phase Heat Transfer Coefficient - (Measured in Watt per Square Meter per Kelvin) - Liquid Phase Heat Transfer Coefficient is the heat transfer in liquid per unit area in kelvin.
Inside Temperature - (Measured in Kelvin) - Inside Temperature is the temperature of air present inside.
Liquid layer temperature - Liquid layer temperature is defined as the temperature of the flowing liquid layer in dehumidification.
Enthalpy of Evaporation - (Measured in Joule per Kilogram K) - Enthalpy of evaporation is the amount of energy (enthalpy) that must be added to a liquid substance to transform a quantity of that substance into a gas.
Gas Phase Mass Transfer Coefficient - (Measured in Mole per Second Square Meter) - Gas phase mass transfer coefficient is a diffusion rate constant that relates the mass transfer rate, mass transfer area, and concentration change as driving force.
Absolute Humidity of Air(tg) - Absolute Humidity of Air(tg) at the initial air temperature.
Absolute Humidity (ti) - Absolute humidity (ti) is the quality of water vapor in the wet air of unit volume at temperature ti.
Bulk Gas Temperature - Bulk gas temperature is adiabatic mixing of the gas from a given cross section of duct will result in some equilibrium temperature that accurately reflects average temperature of the moving fluid.

STEP 1: Convert Input(s) to Base Unit

Liquid Phase Heat Transfer Coefficient: 10.8 Watt per Square Meter per Kelvin --> 10.8 Watt per Square Meter per Kelvin No Conversion Required
Inside Temperature: 353 Kelvin --> 353 Kelvin No Conversion Required
Liquid layer temperature: 20 --> No Conversion Required
Enthalpy of Evaporation: 90 Joule per Kilogram K --> 90 Joule per Kilogram K No Conversion Required
Gas Phase Mass Transfer Coefficient: 90 Mole per Second Square Meter --> 90 Mole per Second Square Meter No Conversion Required
Absolute Humidity of Air(tg): 16 --> No Conversion Required
Absolute Humidity (ti): 50.7 --> No Conversion Required
Bulk Gas Temperature: 100 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

hg = ((h1*(t_i-Tl))-(hfg*k_y*(Yg-Yi)))/(Tg-t_i) --> ((10.8*(353-20))-(90*90*(16-50.7)))/(100-353)

Evaluating ... ...

hg = -1125.16363636364

STEP 3: Convert Result to Output's Unit

-1125.16363636364 Watt per Square Meter per Kelvin --> No Conversion Required

FINAL ANSWER

-1125.16363636364 ≈ -1125.163636 Watt per Square Meter per Kelvin <-- Gas Phase Heat Transfer Coefficient

(Calculation completed in 00.020 seconds)

You are here -

Home » Physics » Heat and Mass Transfer » Humidification » Gas phase heat transfer coefficient in dehumidification

Credits

Created by Nishan Poojary

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

Nishan Poojary has created this Calculator and 500+ more calculators!

Verified by Rajat Vishwakarma

University Institute of Technology RGPV (UIT - RGPV), Bhopal

Rajat Vishwakarma has verified this Calculator and 400+ more calculators!

< 24 Humidification Calculators

Absolute humidity at inside temperature in dehumidification

Go Absolute Humidity (ti) = Absolute Humidity of Air(tg)-(((Liquid Phase Heat Transfer Coefficient*(Temperature at inner surface-Liquid layer temperature))-Gas Phase Heat Transfer Coefficient*(Bulk Gas Temperature-Temperature at inner surface))/(Gas Phase Mass Transfer Coefficient*Enthalpy of Evaporation))

Enthalpy of evaporation in dehumidification

Go Enthalpy of Evaporation = ((Liquid Phase Heat Transfer Coefficient*(Temperature at inner surface-Liquid layer temperature))-Gas Phase Heat Transfer Coefficient*(Bulk Gas Temperature-Temperature at inner surface))/(Gas Phase Mass Transfer Coefficient*(Absolute Humidity of Air(tg)-Absolute Humidity (ti)))

Liquid phase heat transfer coefficient in dehumidification

Go Liquid Phase Heat Transfer Coefficient = ((Gas Phase Heat Transfer Coefficient*(Bulk Gas Temperature-Temperature at inner surface))+Enthalpy of Evaporation*Gas Phase Mass Transfer Coefficient*(Absolute Humidity of Air(tg)-Absolute Humidity (ti)))/(Temperature at inner surface-Liquid layer temperature)

Gas phase heat transfer coefficient in dehumidification

Go Gas Phase Heat Transfer Coefficient = ((Liquid Phase Heat Transfer Coefficient*(Inside Temperature-Liquid layer temperature))-(Enthalpy of Evaporation*Gas Phase Mass Transfer Coefficient*(Absolute Humidity of Air(tg)-Absolute Humidity (ti))))/(Bulk Gas Temperature-Inside Temperature)

Gas phase mass transfer coefficient in dehumidification

Go Gas Phase Mass Transfer Coefficient = ((Liquid Phase Heat Transfer Coefficient*(Inside Temperature-Liquid layer temperature))-Gas Phase Heat Transfer Coefficient*(Bulk Gas Temperature-Inside Temperature))/(Enthalpy of Evaporation*(Absolute Humidity of Air(tg)-Absolute Humidity (ti)))

Bulk gas temperature in dehumidification

Go Bulk Gas Temperature = (((Liquid Phase Heat Transfer Coefficient*(Inside Temperature-Liquid layer temperature))-(Enthalpy of Evaporation*Gas Phase Mass Transfer Coefficient*(Absolute Humidity of Air(tg)-Absolute Humidity (ti))))/Gas Phase Heat Transfer Coefficient)+Inside Temperature

Liquid layer temperature in dehumidification

Go Liquid layer temperature = Inside Temperature-(((Gas Phase Heat Transfer Coefficient*(Bulk Gas Temperature-Inside Temperature))+Enthalpy of Evaporation*Gas Phase Mass Transfer Coefficient*(Absolute Humidity of Air(tg)-Absolute Humidity (ti)))/Liquid Phase Heat Transfer Coefficient)

Specific heat of air given gas constant

Go Specific Heat of Air = (((Enthalpy of Evaporation*(Partial Pressure-Partial Pressure in air))/(Gas constant*Density*(Air Temperature-Wet Bulb Temperature)*Mean Temperature*(Lewis Number^0.67))))

Gas constant of water vapor

Go Gas constant = (((Enthalpy of Evaporation*(Partial Pressure-Partial Pressure in air))/((Air Temperature-Wet Bulb Temperature)*Density*Specific Heat of Air*Mean Temperature*(Lewis Number^0.67))))

Temperature of air given gas constant of water

Go Air Temperature = (((Enthalpy of Evaporation*(Partial Pressure-Partial Pressure in air))/(Gas constant*Density*Specific Heat of Air*Mean Temperature*(Lewis Number^0.67))))+Wet Bulb Temperature

Wet bulb temperature given gas constant of water vapor

Go Wet Bulb Temperature = Air Temperature-((Enthalpy of Evaporation*(Partial Pressure-Partial Pressure in air))/(Gas constant*Density*Specific Heat of Air*Mean Temperature*(Lewis Number^0.67)))

Temperature of air during humidification

Go Air Temperature = (((0.622*Enthalpy of Evaporation)/(Specific Heat of Air*(Lewis Number^0.67)))*((Partial Pressure/Total Pressure)-(Partial Pressure in air/Total Pressure)))+Wet Bulb Temperature

Wet bulb temperature of humidification

Go Wet Bulb Temperature = Air Temperature-((0.622*Enthalpy of Evaporation)/(Specific Heat of Air*(Lewis Number^0.67)))*((Partial Pressure/Total Pressure)-(Partial Pressure in air/Total Pressure))

Absolute Humidity of Air at Final Equilibrium Air Temperature

Go Absolute Humidity of Air(ta) = (((Specific Heat of Air+(Absolute Humidity of Air(tg)*Specific Heat of Water Vapor))*(Bulk Gas Temperature-Temperature))/(Enthalpy of Evaporation))+Absolute Humidity of Air(tg)

Gas phase mass transfer coefficient given humidity

Go Gas Phase Mass Transfer Coefficient = (Mass Velocity of Air/Height)*ln((Absolute Humidity at Final Temperature-Humidity of air at entry)/(Absolute Humidity at Final Temperature-Humidity of air at exit))

Height of tower in adiabatic humidification

Go Height = (Mass Velocity of Air/Gas Phase Mass Transfer Coefficient)*ln((Absolute Humidity at Final Temperature-Humidity of air at entry)/(Absolute Humidity at Final Temperature-Humidity of air at exit))

Mass velocity of air per unit area

Go Mass Velocity of Air = (Height*Gas Phase Mass Transfer Coefficient)/ln((Absolute Humidity of Air(ta)-Humidity of Air at Entry(t))/(Absolute Humidity of Air(ta)-Humidity of air at exit))

Partial pressure of water vapor at wet bulb temperature

Go Partial Pressure = ((Convective Heat Transfer Coefficient*(Air Temperature-Wet Bulb Temperature))/(Enthalpy of Evaporation*Convective Mass Transfer Coefficient))+Partial Pressure in air

Convective mass transfer coefficient in humidification

Go Convective Mass Transfer Coefficient = (Convective Heat Transfer Coefficient*(Air Temperature-Wet Bulb Temperature))/(Enthalpy of Evaporation*(Partial Pressure-Partial Pressure in air))

Enthalpy of evaporation for water in humidification

Go Enthalpy of Evaporation = (Convective Heat Transfer Coefficient*(Air Temperature-Wet Bulb Temperature))/(Convective Mass Transfer Coefficient*(Partial Pressure-Partial Pressure in air))

Partial pressure of water vapor in air

Go Partial Pressure in air = Partial Pressure-((Convective Heat Transfer Coefficient*(Air Temperature-Wet Bulb Temperature))/(Enthalpy of Evaporation*Convective Mass Transfer Coefficient))

Heat transfer coefficient in humidification

Go Heat Transfer Coefficient = ((Partial Pressure-Partial Pressure in air)*(Enthalpy of Evaporation*Convective Mass Transfer Coefficient))/(Air Temperature-Wet Bulb Temperature)

Enthalpy of evaporation of water in humidification

Go Enthalpy of Evaporation = (Specific Heat of Air*(Lewis Number^0.67))/((Absolute Humidity of Air(tw)-Absolute Humidity of Air(atm))/(Air Temperature-Wet Bulb Temperature))

Specific heat of air during humidification

Go Specific Heat of Air = (Absolute Humidity of Air(tw)-Absolute Humidity of Air(atm))*Enthalpy of Evaporation/((Temperature-Air Temperature)*Lewis Number^0.67)

Gas phase heat transfer coefficient in dehumidification Formula

What is humidification?

Humidification is the process in which the moisture or water vapor or humidity is added to the air. Common equipment used in this process is a humidifier. Dehumidification as the term suggests, is the opposite of humidification since dehumidification means removing the moisture from the air. Common equipment used in this process is a dehumidifier.
Humidity is the presence of water vapor or moisture in the air, while relative humidity, on the other hand, is the comparison of the actual moisture or water vapor in the air vs. the total water vapor or moisture that the air can handle.

How to Calculate Gas phase heat transfer coefficient in dehumidification?

Gas phase heat transfer coefficient in dehumidification calculator uses Gas Phase Heat Transfer Coefficient = ((Liquid Phase Heat Transfer Coefficient*(Inside Temperature-Liquid layer temperature))-(Enthalpy of Evaporation*Gas Phase Mass Transfer Coefficient*(Absolute Humidity of Air(tg)-Absolute Humidity (ti))))/(Bulk Gas Temperature-Inside Temperature) to calculate the Gas Phase Heat Transfer Coefficient, The Gas phase heat transfer coefficient in dehumidification formula is defined as convective heat transfer relation between gas medium and surface on which the gas is flowing. Gas Phase Heat Transfer Coefficient is denoted by hg symbol.

How to calculate Gas phase heat transfer coefficient in dehumidification using this online calculator? To use this online calculator for Gas phase heat transfer coefficient in dehumidification, enter Liquid Phase Heat Transfer Coefficient (h1), Inside Temperature (t_i), Liquid layer temperature (Tl), Enthalpy of Evaporation (hfg), Gas Phase Mass Transfer Coefficient (k_y), Absolute Humidity of Air(tg) (Yg), Absolute Humidity (ti) (Yi) & Bulk Gas Temperature (Tg) and hit the calculate button. Here is how the Gas phase heat transfer coefficient in dehumidification calculation can be explained with given input values -> -1001.724901 = ((10.8*(353-20))-(90*90*(16-50.7)))/(100-353).

FAQ

What is Gas phase heat transfer coefficient in dehumidification?

The Gas phase heat transfer coefficient in dehumidification formula is defined as convective heat transfer relation between gas medium and surface on which the gas is flowing and is represented as hg = ((h1*(t_i-Tl))-(hfg*k_y*(Yg-Yi)))/(Tg-t_i) or Gas Phase Heat Transfer Coefficient = ((Liquid Phase Heat Transfer Coefficient*(Inside Temperature-Liquid layer temperature))-(Enthalpy of Evaporation*Gas Phase Mass Transfer Coefficient*(Absolute Humidity of Air(tg)-Absolute Humidity (ti))))/(Bulk Gas Temperature-Inside Temperature). Liquid Phase Heat Transfer Coefficient is the heat transfer in liquid per unit area in kelvin, Inside Temperature is the temperature of air present inside, Liquid layer temperature is defined as the temperature of the flowing liquid layer in dehumidification, Enthalpy of evaporation is the amount of energy (enthalpy) that must be added to a liquid substance to transform a quantity of that substance into a gas, Gas phase mass transfer coefficient is a diffusion rate constant that relates the mass transfer rate, mass transfer area, and concentration change as driving force, Absolute Humidity of Air(tg) at the initial air temperature, Absolute humidity (ti) is the quality of water vapor in the wet air of unit volume at temperature ti & Bulk gas temperature is adiabatic mixing of the gas from a given cross section of duct will result in some equilibrium temperature that accurately reflects average temperature of the moving fluid.

How to calculate Gas phase heat transfer coefficient in dehumidification?

The Gas phase heat transfer coefficient in dehumidification formula is defined as convective heat transfer relation between gas medium and surface on which the gas is flowing is calculated using Gas Phase Heat Transfer Coefficient = ((Liquid Phase Heat Transfer Coefficient*(Inside Temperature-Liquid layer temperature))-(Enthalpy of Evaporation*Gas Phase Mass Transfer Coefficient*(Absolute Humidity of Air(tg)-Absolute Humidity (ti))))/(Bulk Gas Temperature-Inside Temperature). To calculate Gas phase heat transfer coefficient in dehumidification, you need Liquid Phase Heat Transfer Coefficient (h1), Inside Temperature (t_i), Liquid layer temperature (Tl), Enthalpy of Evaporation (hfg), Gas Phase Mass Transfer Coefficient (k_y), Absolute Humidity of Air(tg) (Yg), Absolute Humidity (ti) (Yi) & Bulk Gas Temperature (Tg). With our tool, you need to enter the respective value for Liquid Phase Heat Transfer Coefficient, Inside Temperature, Liquid layer temperature, Enthalpy of Evaporation, Gas Phase Mass Transfer Coefficient, Absolute Humidity of Air(tg), Absolute Humidity (ti) & Bulk Gas Temperature and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

Home

FREE PDFs

🔍 Search