StmSI_VPH

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

Format

StmSI_VPH(P, H)

Arguments

• P

  Pressure of the steam in KPa. The valid range is 0.6111213 to 100000 KPa.

• H

  Specific enthalpy of the steam in J/g. The valid range is -0.04158 to 3753 J/g.

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.