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Gas phase heat transfer coefficient in dehumidification Formula

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

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

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

Gas phase heat transfer coefficient in dehumidification Example

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

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

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

-1125.1636 = \frac{(10.8 \cdot (353 - 20)) - (90 \cdot 90 \cdot (16 - 50.7))}{100 - 353}

-1125.1636W/m²*K = \frac{(10.8W/m²*K \cdot (353K - 20)) - (90J/kg*K \cdot 90mol/s*m² \cdot (16 - 50.7))}{100 - 353K}

-1125.1636 = \frac{(10.8 \cdot (353 - 20)) - (90 \cdot 90 \cdot (16 - 50.7))}{100 - 353}

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Gas phase heat transfer coefficient in dehumidification Solution

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

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

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

Next Step Prepare to Evaluate

∴

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

Next Step Evaluate

∴

hg = -1125.16363636364W/m²*K

LAST Step Rounding Answer

∴

hg = -1125.1636W/m²*K

Gas phase heat transfer coefficient in dehumidification Formula Elements

Variables

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

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

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

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

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)

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

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 heat transfer coefficient in dehumidification?

Gas phase heat transfer coefficient in dehumidification evaluator 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 evaluate 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 evaluate Gas phase heat transfer coefficient in dehumidification using this online evaluator? To use this online evaluator 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.

FAQs on Gas phase heat transfer coefficient in dehumidification

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

The formula of Gas phase heat transfer coefficient in dehumidification is expressed as 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). Here is an example- -1001.724901 = ((10.8*(353-20))-(90*90*(16-50.7)))/(100-353).

How to calculate Gas phase heat transfer coefficient in dehumidification?

With 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) we can find Gas phase heat transfer coefficient in dehumidification using the formula - 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).

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

Yes, the Gas phase heat transfer coefficient in dehumidification, measured in Heat Transfer Coefficient can be negative.

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

Gas phase heat transfer coefficient in dehumidification 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 Gas phase heat transfer coefficient in dehumidification can be measured.

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Gas phase heat transfer coefficient in dehumidification Formula

Gas phase heat transfer coefficient in dehumidification Example

Gas phase heat transfer coefficient in dehumidification Solution

Gas phase heat transfer coefficient in dehumidification Formula Elements

Other formulas in Humidification category

How to Evaluate Gas phase heat transfer coefficient in dehumidification?

FAQs on Gas phase heat transfer coefficient in dehumidification

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