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Heat transfer coefficient in humidification Formula

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The Heat Transfer Coefficient is the heat transferred per unit area per kelvin. Thus area is included in the equation as it represents the area over which the transfer of heat takes place. Check FAQs

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

h - Heat Transfer Coefficient?Pw - Partial Pressure?P∞ - Partial Pressure in air?hfg - Enthalpy of Evaporation?k_L - Convective Mass Transfer Coefficient?T∞ - Air Temperature?T_w - Wet Bulb Temperature?

Heat transfer coefficient in humidification Example

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Here is how the Heat transfer coefficient in humidification equation looks like with Values.

Here is how the Heat transfer coefficient in humidification equation looks like with Units.

Here is how the Heat transfer coefficient in humidification equation looks like.

0.5286 = \frac{(13 - 0.016) \cdot (90 \cdot 0.0095)}{35 - 14}

0.5286W/m²*K = \frac{(13 - 0.016) \cdot (90J/kg*K \cdot 0.0095m/s)}{35 - 14}

0.5286 = \frac{(13 - 0.016) \cdot (90 \cdot 0.0095)}{35 - 14}

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Heat transfer coefficient in humidification Solution

Follow our step by step solution on how to calculate Heat transfer coefficient in humidification?

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

h = \frac{(13 - 0.016) \cdot (90J/kg*K \cdot 0.0095m/s)}{35 - 14}

Next Step Prepare to Evaluate

∴

h = \frac{(13 - 0.016) \cdot (90 \cdot 0.0095)}{35 - 14}

Next Step Evaluate

∴

h = 0.528634285714286W/m²*K

LAST Step Rounding Answer

∴

h = 0.5286W/m²*K

Heat transfer coefficient in humidification Formula Elements

Variables

Heat Transfer Coefficient

The Heat Transfer Coefficient is the heat transferred per unit area per kelvin. Thus area is included in the equation as it represents the area over which the transfer of heat takes place.

Symbol: h

Measurement: Heat Transfer CoefficientUnit: W/m²*K

Note: Value can be positive or negative.

Formulas to find Heat Transfer Coefficient

Partial Pressure

Partial pressure of the water vapor at wet bulb temperature.

Symbol: Pw

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Partial Pressure

Partial Pressure in air

Partial pressure in air of the water vapor is the pressure of water in the mixture of water and air.

Symbol: P∞

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Partial Pressure in air

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

Convective Mass Transfer Coefficient

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.

Symbol: k_L

Measurement: SpeedUnit: m/s

Note: Value can be positive or negative.

Formulas to find Convective Mass Transfer Coefficient

Air Temperature

Air temperature is the temperature of the air surrounding an individual and is typically measured in degrees Celsius (°C) or in Kelvin.

Symbol: T∞

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Air Temperature

Wet Bulb Temperature

Wet Bulb Temperature is the temperature of the wet bulb and denoted by the symbol Tw.

Symbol: T_w

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Wet Bulb 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 Heat transfer coefficient in humidification?

Heat transfer coefficient in humidification evaluator uses Heat Transfer Coefficient = ((Partial Pressure-Partial Pressure in air)*(Enthalpy of Evaporation*Convective Mass Transfer Coefficient))/(Air Temperature-Wet Bulb Temperature) to evaluate the Heat Transfer Coefficient, The Heat transfer coefficient in humidification formula is defined as the characteristic of convective heat transfer between a fluid medium (a fluid) and the surface (wall) flowed over by the fluid. Heat Transfer Coefficient is denoted by h symbol.

How to evaluate Heat transfer coefficient in humidification using this online evaluator? To use this online evaluator for Heat transfer coefficient in humidification, enter Partial Pressure (Pw), Partial Pressure in air (P∞), Enthalpy of Evaporation (hfg), Convective Mass Transfer Coefficient (k_L), Air Temperature (T∞) & Wet Bulb Temperature (T_w) and hit the calculate button.

FAQs on Heat transfer coefficient in humidification

What is the formula to find Heat transfer coefficient in humidification?

The formula of Heat transfer coefficient in humidification is expressed as Heat Transfer Coefficient = ((Partial Pressure-Partial Pressure in air)*(Enthalpy of Evaporation*Convective Mass Transfer Coefficient))/(Air Temperature-Wet Bulb Temperature). Here is an example- 0.469897 = ((13-0.016)*(90*0.0095))/(35-14).

How to calculate Heat transfer coefficient in humidification?

With Partial Pressure (Pw), Partial Pressure in air (P∞), Enthalpy of Evaporation (hfg), Convective Mass Transfer Coefficient (k_L), Air Temperature (T∞) & Wet Bulb Temperature (T_w) we can find Heat transfer coefficient in humidification using the formula - Heat Transfer Coefficient = ((Partial Pressure-Partial Pressure in air)*(Enthalpy of Evaporation*Convective Mass Transfer Coefficient))/(Air Temperature-Wet Bulb Temperature).

Can the Heat transfer coefficient in humidification be negative?

Yes, the Heat transfer coefficient in humidification, measured in Heat Transfer Coefficient can be negative.

Which unit is used to measure Heat transfer coefficient in humidification?

Heat transfer coefficient in humidification 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 Heat transfer coefficient in humidification can be measured.

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Heat transfer coefficient in humidification Formula

Heat transfer coefficient in humidification Example

Heat transfer coefficient in humidification Solution

Heat transfer coefficient in humidification Formula Elements

Other formulas in Humidification category

How to Evaluate Heat transfer coefficient in humidification?

FAQs on Heat transfer coefficient in humidification

Variable Name