StmEng_VPH

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

Format

StmEng_VPH(P, H)

Arguments

• P

  Pressure of the steam in psia. The valid range is 0.08865 to 14503.77 psia.

• H

  Specific enthalpy of the steam in BTU/lbm. The valid range is -1 to 1860 BTU/lbm.

Returns

Computed vapor specific volume in ft3/lbm 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.