Function Call “=H2o.PTS(pressure, temperature, units, metastable)”
Input Parameters
- Pressure: (0)MPa, (1)psia, (2)bara, (3)kPa
- Temperature: (0)K, (1)°F, (2)°C, (3)°C
- Units: (0)SI, (1)US Customary, (2)Metric bara, (3) Metric kPa
- Metastable: false=normal, true=metastable
Return Value
- Entropy: (0)kJ/(kg·K), (1)BTU/(lbm·°F), (2)kJ/(kg·°C), (3)kJ/(kg·°C)
Default values: Units: (0)SI; Metastable: false
Metastable conditions may occur during a sudden steam expansion that crosses over from superheated to saturated conditions. The metastable calculations are valid from the saturated-vapor line to the 5% equilibrium moisture line for pressures from the triple-point pressure up to 10 MPa.
Reference Document: IAPWS R7-97