StmSI_VPS

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

Format

StmSI_VPS(P, S)

Arguments

• P

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

• S

  Specific entropy of the steam in J/g/K. The valid range is -0.41868 to 12.5604 J/g/K.

Returns

Computed vapor specific volume in cc/g or Error digital state.

Sample Values

Note: The computed result may differ slightly from that computed using the saturated liquid volume, saturated vapor volume and vapor fraction. The difference increases with the moisture content of the steam.