R-22 pressure vs temperature relation formula
R-22 pressure vs temperature relation formula
(OP)
Hi everybody,
Is there a formula we can use to get R-22 saturation temperature from the saturation pressure without using that ph table?
i need that formula in my contrl program.
thanks.
Is there a formula we can use to get R-22 saturation temperature from the saturation pressure without using that ph table?
i need that formula in my contrl program.
thanks.





RE: R-22 pressure vs temperature relation formula
ASHRAE Fundamentals, Chapt 17 has pressure enthalpy diagram and tables with everything you want to know about R22.
Took me less than 60 sec to get it
RE: R-22 pressure vs temperature relation formula
They were also published in the 1969 edition of ASHRAE's refrigerant "bible".
RE: R-22 pressure vs temperature relation formula
If you find any formula at Nist or Dupont, let me know, I couldnt.
RE: R-22 pressure vs temperature relation formula
RE: R-22 pressure vs temperature relation formula
Saturation Temperature t
need in Rankin
T = t + 459.69
Term 1 = A
Term 2 = B/T
Term 3 = C*LOG10(T)
Term 4 = D*T
Term 5 = (E*(F-T)/(F*T))*LOG10(F-T))
Saturated Vapour Pressure
psia = 10^(C8-C9-C10+C11+C12)
psig = psia - 14.696
Fixed Coefficients
A 29.35754453
B 3845.193152
C 7.86103122
D 0.002190939044
E 305.8268131
F 686.1