StmSI_SPT

Calculates the vapor specific entropy as a function of pressure and temperature—all variables expressed in SI units. Only use for superheated or dry saturated steam. An error of -1 (or input out of range digital state) is returned for input temperature lower than the saturation temperature for the input pressure. However, the function computes for the full range of temperature for input pressure greater than the critical pressure.

Format

StmSI_SPT(P, T)

Arguments

• P

  Pressure of the steam in KPa. The valid range is 0.611213 to 100000 KPa for temperatures up to 800 °C, and 0.611213 to 50000 Kpa for temperatures up to 2000 °C.

• T

  Steam temperature in °C. The valid range is 0 to 2000 °C.

Returns

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

Sample Values