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Enthalpy of evaporation for water in humidification Calculator

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✖Convective Heat Transfer Coefficient is the heat transfer due to convection.ⓘ Convective Heat Transfer Coefficient [h_Conv]			+10% -10%
✖Air temperature is the temperature of the air surrounding an individual and is typically measured in degrees Celsius (°C) or in Kelvin.ⓘ Air Temperature [T∞]			+10% -10%
✖Wet Bulb Temperature is the temperature of the wet bulb and denoted by the symbol Tw.ⓘ Wet Bulb Temperature [T_w]			+10% -10%
✖Convective Mass Transfer Coefficient is a function of geometry of the system and the velocity and properties of the fluid similar to the heat transfer coefficient.ⓘ Convective Mass Transfer Coefficient [k_L]			+10% -10%
✖Partial pressure of the water vapor at wet bulb temperature.ⓘ Partial Pressure [Pw]			+10% -10%
✖Partial pressure in air of the water vapor is the pressure of water in the mixture of water and air.ⓘ Partial Pressure in air [P∞]			+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 for water in humidification [hfg]

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Enthalpy of evaporation for water in humidification Solution

STEP 0: Pre-Calculation Summary

Formula Used

Enthalpy of Evaporation = (Convective Heat Transfer Coefficient*(Air Temperature-Wet Bulb Temperature))/(Convective Mass Transfer Coefficient*(Partial Pressure-Partial Pressure in air))
hfg = (h_Conv*(T∞-T_w))/(k_L*(Pw-P∞))
This formula uses 7 Variables

Variables Used

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.
Convective Heat Transfer Coefficient - (Measured in Watt per Square Meter per Kelvin) - Convective Heat Transfer Coefficient is the heat transfer due to convection.
Air Temperature - Air temperature is the temperature of the air surrounding an individual and is typically measured in degrees Celsius (°C) or in Kelvin.
Wet Bulb Temperature - Wet Bulb Temperature is the temperature of the wet bulb and denoted by the symbol Tw.
Convective Mass Transfer Coefficient - (Measured in Meter per Second) - Convective Mass Transfer Coefficient is a function of geometry of the system and the velocity and properties of the fluid similar to the heat transfer coefficient.
Partial Pressure - Partial pressure of the water vapor at wet bulb temperature.
Partial Pressure in air - Partial pressure in air of the water vapor is the pressure of water in the mixture of water and air.

STEP 1: Convert Input(s) to Base Unit

Convective Heat Transfer Coefficient: 0.5 Watt per Square Meter per Kelvin --> 0.5 Watt per Square Meter per Kelvin No Conversion Required
Air Temperature: 35 --> No Conversion Required
Wet Bulb Temperature: 14 --> No Conversion Required
Convective Mass Transfer Coefficient: 0.0095 Meter per Second --> 0.0095 Meter per Second No Conversion Required
Partial Pressure: 13 --> No Conversion Required
Partial Pressure in air: 0.016 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

hfg = (h_Conv*(T∞-T_w))/(k_L*(Pw-P∞)) --> (0.5*(35-14))/(0.0095*(13-0.016))

Evaluating ... ...

hfg = 85.125012160716

STEP 3: Convert Result to Output's Unit

85.125012160716 Joule per Kilogram K --> No Conversion Required

FINAL ANSWER

85.125012160716 ≈ 85.12501 Joule per Kilogram K <-- Enthalpy of Evaporation

(Calculation completed in 00.004 seconds)

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Home » Physics » Heat and Mass Transfer » Mechanical » Humidification » Enthalpy of evaporation for water in humidification

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< Humidification Calculators

Gas phase heat transfer coefficient in dehumidification

LaTeX 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)

Liquid layer temperature in dehumidification

LaTeX 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)

Convective mass transfer coefficient in humidification

LaTeX 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

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

Enthalpy of evaporation for water in humidification Formula

LaTeX Go

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 Enthalpy of evaporation for water in humidification?

Enthalpy of evaporation for water in humidification calculator uses Enthalpy of Evaporation = (Convective Heat Transfer Coefficient*(Air Temperature-Wet Bulb Temperature))/(Convective Mass Transfer Coefficient*(Partial Pressure-Partial Pressure in air)) to calculate the Enthalpy of Evaporation, The Enthalpy of evaporation for water in humidification formula is defined as the amount of heat energy required to change the state of water to gas. Enthalpy of Evaporation is denoted by hfg symbol.

How to calculate Enthalpy of evaporation for water in humidification using this online calculator? To use this online calculator for Enthalpy of evaporation for water in humidification, enter Convective Heat Transfer Coefficient (h_Conv), Air Temperature (T∞), Wet Bulb Temperature (T_w), Convective Mass Transfer Coefficient (k_L), Partial Pressure (Pw) & Partial Pressure in air (P∞) and hit the calculate button. Here is how the Enthalpy of evaporation for water in humidification calculation can be explained with given input values -> 85.12501 = (0.5*(35-14))/(0.0095*(13-0.016)).

FAQ

What is Enthalpy of evaporation for water in humidification?

The Enthalpy of evaporation for water in humidification formula is defined as the amount of heat energy required to change the state of water to gas and is represented as hfg = (h_Conv*(T∞-T_w))/(k_L*(Pw-P∞)) or Enthalpy of Evaporation = (Convective Heat Transfer Coefficient*(Air Temperature-Wet Bulb Temperature))/(Convective Mass Transfer Coefficient*(Partial Pressure-Partial Pressure in air)). Convective Heat Transfer Coefficient is the heat transfer due to convection, Air temperature is the temperature of the air surrounding an individual and is typically measured in degrees Celsius (°C) or in Kelvin, Wet Bulb Temperature is the temperature of the wet bulb and denoted by the symbol Tw, Convective Mass Transfer Coefficient is a function of geometry of the system and the velocity and properties of the fluid similar to the heat transfer coefficient, Partial pressure of the water vapor at wet bulb temperature & Partial pressure in air of the water vapor is the pressure of water in the mixture of water and air.

How to calculate Enthalpy of evaporation for water in humidification?

The Enthalpy of evaporation for water in humidification formula is defined as the amount of heat energy required to change the state of water to gas is calculated using Enthalpy of Evaporation = (Convective Heat Transfer Coefficient*(Air Temperature-Wet Bulb Temperature))/(Convective Mass Transfer Coefficient*(Partial Pressure-Partial Pressure in air)). To calculate Enthalpy of evaporation for water in humidification, you need Convective Heat Transfer Coefficient (h_Conv), Air Temperature (T∞), Wet Bulb Temperature (T_w), Convective Mass Transfer Coefficient (k_L), Partial Pressure (Pw) & Partial Pressure in air (P∞). With our tool, you need to enter the respective value for Convective Heat Transfer Coefficient, Air Temperature, Wet Bulb Temperature, Convective Mass Transfer Coefficient, Partial Pressure & Partial Pressure in air and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Enthalpy of Evaporation?

In this formula, Enthalpy of Evaporation uses Convective Heat Transfer Coefficient, Air Temperature, Wet Bulb Temperature, Convective Mass Transfer Coefficient, Partial Pressure & Partial Pressure in air. We can use 2 other way(s) to calculate the same, which is/are as follows -

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)))
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))

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