[tag] WaterLiquidEnthalpyIAPWSIF97Region4

The water liquid saturation enthalpy in region4 is calculated from pressure according to the IAPWSIF97Region4. Note: (1) The temperature unit is K, and pressure unit is Pa. (2) According to the IAPWS-IF97: http://www.iapws.org/relguide/IF97-Rev.pdf, the vapor-liquid saturation line in region4 only covers the pressure range between 611.213 Pa and 22.064 MPa. Thus, for the liquid saturation enthalpy calculated from the saturation temperature, it has the same pressure boundaries.

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