Dry Bulb Temperature and Wet Bulb Temperature related concepts its application and Frequently asked questions enclosed here
What is Relative Humidity and Dew point? How to calculate it?
Wet bulb temperature is used for find out Relative Humidity
If relative humidity is 100% then wet bulb temperature and dry bulb temperature will be same.
Check wet bulb cloth wrapping which must be continuous wet with continuous air flow.
Suppose reading is
Wet bulb temperature =12°C
Dry bulb temperature = 22°C
Then
ΔT = DBT - WBT
= 22 - 12
= 10°C
Air Pressure = 101.325 Pa
P = 101.325 exp(-0.0001184Elv)
= 101.325
Conversation factor A
A = 0.00066 ( 1.0 + 0.00115 Twb)
= 0.00067
Now we will find Saturated vapour pressure at Wet Bulb Temperature.
= 1.403
= 0.7242
Thanks for reading - Dry Bulb Temperature and Wet Bulb Temperature
Frequently asked questions regarding this
What is dry bulb temperature and wet bulb temperature? why we measure it?What is Relative Humidity and Dew point? How to calculate it?
Dry Bulb Temperature [DBT]
Dry bulb temperature is an ambient air temperature which is directly measured by thermometer it is not affected by moisture contained by air.Wet Bulb Temperature [WBT]
Wet bulb temperature is adiabatic saturated temperature which is measured by thermometer with wet cloth wrapping and continuous air flowWet bulb temperature is used for find out Relative Humidity
If relative humidity is 100% then wet bulb temperature and dry bulb temperature will be same.
How to find relative humidity?
Set thermometer assembly and ensure working condition of it.Check wet bulb cloth wrapping which must be continuous wet with continuous air flow.
Suppose reading is
Wet bulb temperature =12°C
Dry bulb temperature = 22°C
Then
ΔT = DBT - WBT
= 22 - 12
= 10°C
Air Pressure = 101.325 Pa
P = 101.325 exp(-0.0001184Elv)
= 101.325
Conversation factor A
A = 0.00066 ( 1.0 + 0.00115 Twb)
= 0.00067
Now we will find Saturated vapour pressure at Wet Bulb Temperature.
= 1.403
Calculate the vapour pressure of the partial pressure of water vapour
= 0.7242
Calculate Saturated Vapour Pressure Esdb
Relative Humidity = 100 * Ed / Esdb
= 27.3
Dew point also calculated with Wet Bulb Temperature and Dry Bulb Temperature