Partial Pressure of Water Vapor Calculator

✖Saturation Pressure Corresponding to WBT (Wet Bulb Temperature) is the pressure that can be found from the steam table corresponding to wet bulb temperature.ⓘ Saturation Pressure Corresponding to WBT [p_w]			+10% -10%
✖Total Pressure of Moist Air is the pressure exerted by the mixture of air and water vapour which is equal to the sum of the respected pressures. It is also called barometric pressure.ⓘ Total Pressure of Moist Air [p_t]			+10% -10%
✖Dry bulb temperature in °C is the temperature of air measured by a thermometer freely exposed to the air but shielded from radiation and moisture.ⓘ Dry Bulb Temperature in °C [t_db]			+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%

✖Pressure of Water Vapor is the pressure exerted by the water vapour in the moist air or the mixture of dry air and water vapour.ⓘ Partial Pressure of Water Vapor [p_v]

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Formula

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Partial Pressure of Water Vapor

Formula

`"p"_{"v"} = "p"_{"w"}-(("p"_{"t"}-"p"_{"w"})*("t"_{"db"}-"T"_{"w"}))/(1544-1.44*"T"_{"w"})`

Example

`"62.79504Bar"="65Bar"-(("100Bar"-"65Bar")*("110"-"14"))/(1544-1.44*"14")`

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Partial Pressure of Water Vapor Solution

STEP 0: Pre-Calculation Summary

Formula Used

Pressure of Water Vapor = Saturation Pressure Corresponding to WBT-((Total Pressure of Moist Air-Saturation Pressure Corresponding to WBT)*(Dry Bulb Temperature in °C-Wet Bulb Temperature))/(1544-1.44*Wet Bulb Temperature)
p_v = p_w-((p_t-p_w)*(t_db-T_w))/(1544-1.44*T_w)
This formula uses 5 Variables

Variables Used

Pressure of Water Vapor - (Measured in Pascal) - Pressure of Water Vapor is the pressure exerted by the water vapour in the moist air or the mixture of dry air and water vapour.
Saturation Pressure Corresponding to WBT - (Measured in Pascal) - Saturation Pressure Corresponding to WBT (Wet Bulb Temperature) is the pressure that can be found from the steam table corresponding to wet bulb temperature.
Total Pressure of Moist Air - (Measured in Pascal) - Total Pressure of Moist Air is the pressure exerted by the mixture of air and water vapour which is equal to the sum of the respected pressures. It is also called barometric pressure.
Dry Bulb Temperature in °C - Dry bulb temperature in °C is the temperature of air measured by a thermometer freely exposed to the air but shielded from radiation and moisture.
Wet Bulb Temperature - Wet Bulb Temperature is the temperature of the wet bulb and denoted by the symbol Tw.

STEP 1: Convert Input(s) to Base Unit

Saturation Pressure Corresponding to WBT: 65 Bar --> 6500000 Pascal (Check conversion here)
Total Pressure of Moist Air: 100 Bar --> 10000000 Pascal (Check conversion here)
Dry Bulb Temperature in °C: 110 --> No Conversion Required
Wet Bulb Temperature: 14 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

p_v = p_w-((p_t-p_w)*(t_db-T_w))/(1544-1.44*T_w) --> 6500000-((10000000-6500000)*(110-14))/(1544-1.44*14)

Evaluating ... ...

p_v = 6279504.4099118

STEP 3: Convert Result to Output's Unit

6279504.4099118 Pascal -->62.795044099118 Bar (Check conversion here)

FINAL ANSWER

62.795044099118 ≈ 62.79504 Bar <-- Pressure of Water Vapor

(Calculation completed in 00.004 seconds)

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Shri Govindram Seksaria Institute of Technology and Science (SGSITS), Indore

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< 5 Pressure of Water Vapor Calculators

Wet Bulb Temperature using Carrier's Equation

Go Wet Bulb Temperature = (1544*(Saturation Pressure Corresponding to WBT-Pressure of Water Vapor)-Dry Bulb Temperature in °C*(Total Pressure of Moist Air-Saturation Pressure Corresponding to WBT))/(1.44*(Saturation Pressure Corresponding to WBT-Pressure of Water Vapor)-(Total Pressure of Moist Air-Saturation Pressure Corresponding to WBT))

Saturation Pressure Corresponding to Wet Bulb Temperature

Go Saturation Pressure Corresponding to WBT = (Pressure of Water Vapor+Total Pressure of Moist Air*((Dry Bulb Temperature in °C-Wet Bulb Temperature)/(1544-1.44*Wet Bulb Temperature)))/(1+((Dry Bulb Temperature in °C-Wet Bulb Temperature)/(1544-1.44*Wet Bulb Temperature)))

Total Pressure of Moist Air using Carrier's Equation

Go Total Pressure of Moist Air = ((Saturation Pressure Corresponding to WBT-Pressure of Water Vapor)*(1544-1.44*Wet Bulb Temperature))/(Dry Bulb Temperature in °C-Wet Bulb Temperature)+Saturation Pressure Corresponding to WBT

Dry Bulb Temperature using Carrier's Equation

Go Dry Bulb Temperature in °C = ((Saturation Pressure Corresponding to WBT-Pressure of Water Vapor)*(1544-1.44*Wet Bulb Temperature)/(Total Pressure of Moist Air-Saturation Pressure Corresponding to WBT))+Wet Bulb Temperature

Partial Pressure of Water Vapor

Go Pressure of Water Vapor = Saturation Pressure Corresponding to WBT-((Total Pressure of Moist Air-Saturation Pressure Corresponding to WBT)*(Dry Bulb Temperature in °C-Wet Bulb Temperature))/(1544-1.44*Wet Bulb Temperature)

Partial Pressure of Water Vapor Formula

What is dry bulb tempearture?

The Dry Bulb Temperature refers basically to the ambient air temperature. It is called "Dry Bulb" because the air temperature is indicated by a thermometer not affected by the moisture of the air. When people refer to the temperature of the air they are normally referring to the dry bulb temperature.

How to Calculate Partial Pressure of Water Vapor?

Partial Pressure of Water Vapor calculator uses Pressure of Water Vapor = Saturation Pressure Corresponding to WBT-((Total Pressure of Moist Air-Saturation Pressure Corresponding to WBT)*(Dry Bulb Temperature in °C-Wet Bulb Temperature))/(1544-1.44*Wet Bulb Temperature) to calculate the Pressure of Water Vapor, The partial pressure of water vapor formula calculates the partial pressure of water vapor by using the carrier's equation. Pressure of Water Vapor is denoted by p_v symbol.

How to calculate Partial Pressure of Water Vapor using this online calculator? To use this online calculator for Partial Pressure of Water Vapor, enter Saturation Pressure Corresponding to WBT (p_w), Total Pressure of Moist Air (p_t), Dry Bulb Temperature in °C (t_db) & Wet Bulb Temperature (T_w) and hit the calculate button. Here is how the Partial Pressure of Water Vapor calculation can be explained with given input values -> 0.000628 = 6500000-((10000000-6500000)*(110-14))/(1544-1.44*14).

FAQ

What is Partial Pressure of Water Vapor?

The partial pressure of water vapor formula calculates the partial pressure of water vapor by using the carrier's equation and is represented as p_v = p_w-((p_t-p_w)*(t_db-T_w))/(1544-1.44*T_w) or Pressure of Water Vapor = Saturation Pressure Corresponding to WBT-((Total Pressure of Moist Air-Saturation Pressure Corresponding to WBT)*(Dry Bulb Temperature in °C-Wet Bulb Temperature))/(1544-1.44*Wet Bulb Temperature). Saturation Pressure Corresponding to WBT (Wet Bulb Temperature) is the pressure that can be found from the steam table corresponding to wet bulb temperature, Total Pressure of Moist Air is the pressure exerted by the mixture of air and water vapour which is equal to the sum of the respected pressures. It is also called barometric pressure, Dry bulb temperature in °C is the temperature of air measured by a thermometer freely exposed to the air but shielded from radiation and moisture & Wet Bulb Temperature is the temperature of the wet bulb and denoted by the symbol Tw.

How to calculate Partial Pressure of Water Vapor?

The partial pressure of water vapor formula calculates the partial pressure of water vapor by using the carrier's equation is calculated using Pressure of Water Vapor = Saturation Pressure Corresponding to WBT-((Total Pressure of Moist Air-Saturation Pressure Corresponding to WBT)*(Dry Bulb Temperature in °C-Wet Bulb Temperature))/(1544-1.44*Wet Bulb Temperature). To calculate Partial Pressure of Water Vapor, you need Saturation Pressure Corresponding to WBT (p_w), Total Pressure of Moist Air (p_t), Dry Bulb Temperature in °C (t_db) & Wet Bulb Temperature (T_w). With our tool, you need to enter the respective value for Saturation Pressure Corresponding to WBT, Total Pressure of Moist Air, Dry Bulb Temperature in °C & Wet Bulb Temperature and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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