Partial pressure of water vapor Solution

STEP 0: Pre-Calculation Summary
Formula Used
Pressure of water vapour = 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))
pv = pw-(((pt-pw)*(tdb-Tw))/(1544-1.44*Tw))
This formula uses 5 Variables
Variables Used
Pressure of water vapour - (Measured in Pascal) - Pressure of water vapour 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: 90 --> No Conversion Required
Wet bulb temperature: 20 --> No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
pv = pw-(((pt-pw)*(tdb-Tw))/(1544-1.44*Tw)) --> 6500000-(((10000000-6500000)*(90-20))/(1544-1.44*20))
Evaluating ... ...
pv = 6338305.17423442
STEP 3: Convert Result to Output's Unit
6338305.17423442 Pascal -->63.3830517423443 Bar (Check conversion here)
FINAL ANSWER
63.3830517423443 Bar <-- Pressure of water vapour
(Calculation completed in 00.032 seconds)

Credits

Created by Ravi Khiyani
Shri Govindram Seksaria Institute of Technology and Science (SGSITS), Indore
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5 Pressure of water vapour Calculators

Wet Bulb Temperature using Carrier's equation
Wet bulb temperature = ((1544*(Saturation pressure corresponding to WBT-Pressure of water vapour))-(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 vapour))-(Total pressure of moist air-Saturation pressure corresponding to WBT)) Go
Saturation pressure corresponding to wet bulb temperature
Saturation pressure corresponding to WBT = (Pressure of water vapour+(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))) Go
Total pressure of moist air using Carrier's equation
Total pressure of moist air = (((Saturation pressure corresponding to WBT-Pressure of water vapour)*(1544-1.44*Wet bulb temperature))/(Dry Bulb Temperature in °C-Wet bulb temperature))+Saturation pressure corresponding to WBT Go
Partial pressure of water vapor
Pressure of water vapour = 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)) Go
Dry Bulb Temperature using Carrier's equation
Dry Bulb Temperature in °C = ((Saturation pressure corresponding to WBT-Pressure of water vapour)*(1544-1.44*Wet bulb temperature)/(Total pressure of moist air-Saturation pressure corresponding to WBT))+Wet bulb temperature Go

Partial pressure of water vapor Formula

Pressure of water vapour = 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))
pv = pw-(((pt-pw)*(tdb-Tw))/(1544-1.44*Tw))

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 vapour = 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 vapour, The partial pressure of water vapor formula calculates the partial pressure of water vapor by using the carrier's equation. Pressure of water vapour is denoted by pv 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 (pw), Total pressure of moist air (pt), Dry Bulb Temperature in °C (tdb) & Wet bulb temperature (Tw) and hit the calculate button. Here is how the Partial pressure of water vapor calculation can be explained with given input values -> 63.38305 = 6500000-(((10000000-6500000)*(90-20))/(1544-1.44*20)).

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 pv = pw-(((pt-pw)*(tdb-Tw))/(1544-1.44*Tw)) or Pressure of water vapour = 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 vapour = 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 (pw), Total pressure of moist air (pt), Dry Bulb Temperature in °C (tdb) & Wet bulb temperature (Tw). 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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