Calculating Wet Bulb Temperature using Air Temp RH and Pressure
Calculating Wet Bulb Temperature using Air Temp RH and Pressure
(OP)
thread724-129442: Wet bulb calculation
First compute dewpoint temperature (Td)
Td = (-430.22+237.7*LN(E))/(-LN(E)+19.08) = Td in °C
E = (rH/100)*0.611*EXP(17.27*T/(T+237.3))
Then compute wet bulb temperature (Tw)
Tw = [(GAMMA*T)+(DELTA*Td)]/(GAMMA+DELTA)
GAMMA = 0.00066*P
where P is ambient barometric pressure in kPa
DELTA = 4098*E/(Td+237.3)2
I've been trying to find the combined measurement uncertainty when using this formula, particularly the sensitivity coefficients. Thanks
First compute dewpoint temperature (Td)
Td = (-430.22+237.7*LN(E))/(-LN(E)+19.08) = Td in °C
E = (rH/100)*0.611*EXP(17.27*T/(T+237.3))
Then compute wet bulb temperature (Tw)
Tw = [(GAMMA*T)+(DELTA*Td)]/(GAMMA+DELTA)
GAMMA = 0.00066*P
where P is ambient barometric pressure in kPa
DELTA = 4098*E/(Td+237.3)2
I've been trying to find the combined measurement uncertainty when using this formula, particularly the sensitivity coefficients. Thanks






RE: Calculating Wet Bulb Temperature using Air Temp RH and Pressure
Are you referring to the partial derivatives w.r.t. to particular parameters?
TTFN
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RE: Calculating Wet Bulb Temperature using Air Temp RH and Pressure
Yes, That is correct.
RE: Calculating Wet Bulb Temperature using Air Temp RH and Pressure
TTFN
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