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Superheated steam at 1 MPa and 300 °C: IAPWS-IF97 region 2 against the NIST WebBook (IAPWS-95) row
| Tool | Fluid Property Lookup |
| Source | International Association for the Properties of Water and Steam (2012). Revised Release on the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam. IAPWS R7-97(2012), Lucerne, Switzerland. Section 6 (region 2, eqs 15–17, Table 15); Lemmon, E. W., McLinden, M. O., and Friend, D. G. (2023). "Thermophysical Properties of Fluid Systems." NIST Chemistry WebBook, SRD 69 (isobar row at 1 MPa, 573.15 K, IAPWS-95). |
| Level | Undergraduate |
Problem
Find the specific volume, internal energy, enthalpy, entropy, heat capacities, speed of sound, viscosity and thermal conductivity of steam at 1 MPa and 300 °C, name the IF97 region, and give the saturation properties at that temperature and at that pressure.
Inputs to Enter
- Fluid water and steam (IAPWS-IF97), state pair pressure and temperature, p = 1 MPa, T = 300 °C
- Table around the state: pressure step 20 %, temperature step 25 K
Answers
- Region 2, superheated vapour: v = 0.257979 m³/kg, ρ = 3.8763 kg/m³, u = 2793.72 kJ/kg, h = 3051.70 kJ/kg, s = 7.12471 kJ/(kg·K)
- c_p = 2.1408 kJ/(kg·K), c_v = 1.6081 kJ/(kg·K), w = 578.51 m/s; μ = 20.206 µPa·s (IAPWS 2008), k = 0.045122 W/(m·K) (IAPWS 2011), Pr = 0.9587
- NIST WebBook (IAPWS-95) at the same state: v 0.257988, h 3051.63, s 7.12462, c_p 2.14249, w 578.485, μ 20.2055, k 0.0451222: IF97 within 0.004 % (0.08 % in c_p)
- p_sat(300 °C) = 8.5877 MPa, h_fg = 1404.8 kJ/kg; T_sat(1 MPa) = 179.886 °C, h_f = 762.68, h_g = 2777.1 kJ/kg, h_fg = 2014.4 kJ/kg
- USCS: 145.04 psi, 572 °F: v = 4.1324 ft³/lb, h = 1312.00 Btu/lb, s = 1.70171 Btu/(lb·°R)
Notes
The tool's default inputs are this case; press Submit. The library behind it reproduces every verification table of the IF97 release (Tables 5, 7, 9, 15, 18, 24, 29, 33, 35, 36, 42), the IAPWS 2008 viscosity Table 4 and the IAPWS 2011 conductivity Tables 4, 7, 8, 9 to the printed digits (test_fluid_properties.php, 660 checks, with an independent Python implementation in References/Fluid-Properties/checks/).