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Gas phase mass transfer coefficient in dehumidification Formula

GoGas phase mass transfer coefficient given humidity Formula

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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. Check FAQs

k y = \frac{(h1 \cdot (t i - Tl)) - hg \cdot (Tg - t i)}{hfg \cdot (Yg - Yi)}

k_y - Gas Phase Mass Transfer Coefficient?h1 - Liquid Phase Heat Transfer Coefficient?t_i - Inside Temperature?Tl - Liquid layer temperature?hg - Gas Phase Heat Transfer Coefficient?Tg - Bulk Gas Temperature?hfg - Enthalpy of Evaporation?Yg - Absolute Humidity of Air(tg)?Yi - Absolute Humidity (ti)?

Gas phase mass transfer coefficient in dehumidification Example

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Here is how the Gas phase mass transfer coefficient in dehumidification equation looks like with Values.

Here is how the Gas phase mass transfer coefficient in dehumidification equation looks like with Units.

Here is how the Gas phase mass transfer coefficient in dehumidification equation looks like.

-4.3921 = \frac{(10.8 \cdot (353 - 20)) - 40 \cdot (100 - 353)}{90 \cdot (16 - 50.7)}

-4.3921mol/s*m² = \frac{(10.8W/m²*K \cdot (353K - 20)) - 40W/m²*K \cdot (100 - 353K)}{90J/kg*K \cdot (16 - 50.7)}

-4.3921 = \frac{(10.8 \cdot (353 - 20)) - 40 \cdot (100 - 353)}{90 \cdot (16 - 50.7)}

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Gas phase mass transfer coefficient in dehumidification Solution

Follow our step by step solution on how to calculate Gas phase mass transfer coefficient in dehumidification?

FIRST Step Consider the formula

k y = \frac{(h1 \cdot (t i - Tl)) - hg \cdot (Tg - t i)}{hfg \cdot (Yg - Yi)}

Next Step Substitute values of Variables

∴

k y = \frac{(10.8W/m²*K \cdot (353K - 20)) - 40W/m²*K \cdot (100 - 353K)}{90J/kg*K \cdot (16 - 50.7)}

Next Step Prepare to Evaluate

∴

k y = \frac{(10.8 \cdot (353 - 20)) - 40 \cdot (100 - 353)}{90 \cdot (16 - 50.7)}

Next Step Evaluate

∴

k y = -4.39205891770733mol/s*m²

LAST Step Rounding Answer

∴

k y = -4.3921mol/s*m²

Gas phase mass transfer coefficient in dehumidification Formula Elements

Variables

Gas Phase Mass Transfer Coefficient

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.

Symbol: k_y

Measurement: Molar Flux of Diffusing ComponentUnit: mol/s*m²

Note: Value can be positive or negative.

Formulas to find Gas Phase Mass Transfer Coefficient

Liquid Phase Heat Transfer Coefficient

Liquid Phase Heat Transfer Coefficient is the heat transfer in liquid per unit area in kelvin.

Symbol: h1

Measurement: Heat Transfer CoefficientUnit: W/m²*K

Note: Value can be positive or negative.

Formulas to find Liquid Phase Heat Transfer Coefficient

Inside Temperature

Inside Temperature is the temperature of air present inside.

Symbol: t_i

Measurement: TemperatureUnit: K

Note: Value can be positive or negative.

Formulas to find Inside Temperature

Liquid layer temperature

Liquid layer temperature is defined as the temperature of the flowing liquid layer in dehumidification.

Symbol: Tl

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Liquid layer temperature

Gas Phase Heat Transfer Coefficient

Gas Phase Heat Transfer Coefficient is the heat transfer in gas per unit area in kelvin.

Symbol: hg

Measurement: Heat Transfer CoefficientUnit: W/m²*K

Note: Value can be positive or negative.

Formulas to find Gas Phase Heat Transfer Coefficient

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.

Symbol: Tg

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Bulk Gas Temperature

Enthalpy of Evaporation

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.

Symbol: hfg

Measurement: Specific EntropyUnit: J/kg*K

Note: Value can be positive or negative.

Formulas to find Enthalpy of Evaporation

Absolute Humidity of Air(tg)

Absolute Humidity of Air(tg) at the initial air temperature.

Symbol: Yg

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Absolute Humidity of Air(tg)

Absolute Humidity (ti)

Absolute humidity (ti) is the quality of water vapor in the wet air of unit volume at temperature ti.

Symbol: Yi

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Absolute Humidity (ti)

Other Formulas to find Gas Phase Mass Transfer Coefficient

Go Gas phase mass transfer coefficient given humidity

k y = (\frac{G}{Z}) \cdot \ln (\frac{Y i - Y 1}{Y i - Y2})

Other formulas in Humidification category

Go Enthalpy of evaporation for water in humidification

hfg = \frac{h Conv \cdot (T∞ - T w)}{k L \cdot (Pw - P∞)}

Go Convective mass transfer coefficient in humidification

k L = \frac{h Conv \cdot (T∞ - T w)}{hfg \cdot (Pw - P∞)}

How to Evaluate Gas phase mass transfer coefficient in dehumidification?

Gas phase mass transfer coefficient in dehumidification evaluator uses 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))) to evaluate the Gas Phase Mass Transfer Coefficient, The Gas phase mass transfer coefficient in dehumidification formula is defined as a diffusion rate constant that relates the mass transfer rate, mass transfer area, and concentration change as driving force. Gas Phase Mass Transfer Coefficient is denoted by k_y symbol.

How to evaluate Gas phase mass transfer coefficient in dehumidification using this online evaluator? To use this online evaluator for Gas phase mass transfer coefficient in dehumidification, enter Liquid Phase Heat Transfer Coefficient (h1), Inside Temperature (t_i), Liquid layer temperature (Tl), Gas Phase Heat Transfer Coefficient (hg), Bulk Gas Temperature (Tg), Enthalpy of Evaporation (hfg), Absolute Humidity of Air(tg) (Yg) & Absolute Humidity (ti) (Yi) and hit the calculate button.

FAQs on Gas phase mass transfer coefficient in dehumidification

What is the formula to find Gas phase mass transfer coefficient in dehumidification?

The formula of Gas phase mass transfer coefficient in dehumidification is expressed as 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))). Here is an example- -4.941066 = ((10.8*(353-20))-40*(100-353))/(90*(16-50.7)).

How to calculate Gas phase mass transfer coefficient in dehumidification?

With Liquid Phase Heat Transfer Coefficient (h1), Inside Temperature (t_i), Liquid layer temperature (Tl), Gas Phase Heat Transfer Coefficient (hg), Bulk Gas Temperature (Tg), Enthalpy of Evaporation (hfg), Absolute Humidity of Air(tg) (Yg) & Absolute Humidity (ti) (Yi) we can find Gas phase mass transfer coefficient in dehumidification using the formula - 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))).

What are the other ways to Calculate Gas Phase Mass Transfer Coefficient?

Here are the different ways to Calculate Gas Phase Mass Transfer Coefficient-

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))

Can the Gas phase mass transfer coefficient in dehumidification be negative?

Yes, the Gas phase mass transfer coefficient in dehumidification, measured in Molar Flux of Diffusing Component can be negative.

Which unit is used to measure Gas phase mass transfer coefficient in dehumidification?

Gas phase mass transfer coefficient in dehumidification is usually measured using the Mole per Second Square Meter[mol/s*m²] for Molar Flux of Diffusing Component. Kilogram Mole per Second Square Meter[mol/s*m²], Millimole per Microsecond Square Meter[mol/s*m²] are the few other units in which Gas phase mass transfer coefficient in dehumidification can be measured.

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Gas phase mass transfer coefficient in dehumidification Formula

​GoGas phase mass transfer coefficient given humidity Formula

Gas phase mass transfer coefficient in dehumidification Example

Gas phase mass transfer coefficient in dehumidification Solution

Gas phase mass transfer coefficient in dehumidification Formula Elements

Other Formulas to find Gas Phase Mass Transfer Coefficient

Other formulas in Humidification category

How to Evaluate Gas phase mass transfer coefficient in dehumidification?

FAQs on Gas phase mass transfer coefficient in dehumidification

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GoGas phase mass transfer coefficient given humidity Formula