StmSI_SPH

Calculates the vapor specific entropy as a function of pressure and enthalpy—all variables expressed in SI units. Use for both superheated and wet steam.

Format

StmSI_SPH(P, H)

Arguments

• P

  Pressure of the steam in KPa. The valid range is 0.611213 to 100000 KPa.

• H

  Computed vapor specific enthalpy in J/g. The valid range is -2.326 to 4326.36 J/g.

Returns

Computed vapor specific entropy in J/g/K or Error digital state.

Sample Values

Note: Even if the input enthalpy is less than that of the saturated liquid, the function still computes the entropy by extrapolation without setting an error state.