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T_SAT [°C, K, °F, R] returns the saturation temperature of a specified substance at the specified pressure. The units and return value of this function depend on the settings in the Unit System dialog. This function accepts only one argument, in addition to the fluid name, and that is the vapor pressure. The P= must precede the value, variable, or expression providing the pressure. The pressure must be provided in the units specified in the Unit Information dialog. The fluid may be a fluid name or a string variable.
Example: TS=T_sat(R134a, P=100 [kPa])
Note that the saturation temperature can also be obtained using the temperature function with a supplied quality value, as in the following example
TS2=TEMPERATURE(R134a, P=100 [kPa], x=0.5)
Any value of the quality between 0 and 1 will return the saturation temperature, so TS2 and TS in the above examples will return the same value.
The saturation temperature of a blend, e.g., R410A, depends on both the pressure and quality and so it cannot be returned by the T_SAT function. However, the Temperature function will return a value appropriate to the quality that is supplied.
Thermophysical Property Functions