ASTEM97 Evaluation User Guide Copyright Edward D. Throm (C) 2002 ASTEM97 is used to obtain the following 31 properties for water and steam based on the IAPWS IF97 formulations. For a two-phase mixture, only the first 11 values (Page 1) are provided. Page Parameter SI Units English Units 1 Pressure Pa psia Temperature K deg F Quality --- --- Density kg/m^3 lbm/ft^3 Specific Volume m^3/kg ft^3/lbm Specific Internal Energy kJ/kg BTU/lbm Specific Enthalpy kJ/kg BTU/lbm Specific Entropy kJ/kg-K BTU/lbm-F Gibbs Free Energy kJ/kg BTU/lbm Helmholtz Free Energy kJ/kg BTU/lbm Compressibility Factor --- --- 2 Specific Heat At P=const kJ/kg-K BTU/lbm-F Specific Heat at v=const kJ/kg-K BTU/lbm-F Sonic Velocity m/sec ft/sec dv/dp at T=const m^3/kg-Pa ft^3/lbm-psi dv/dt at p=const m^3/kg-K ft^3/lbm-F dp/dv at T=const Pa-kg/m^3 psi-lbm/ft^3 dp/dt at v=const Pa/K psi/F Coef of Thermal Expansion 1/K 1/F Isothermal Compressibility 1/Pa 1/psi Isentropic Exponent --- --- Prandtl Number --- --- 3 Dynamic Viscosity micro kg/m-sec lbm/ft-sec Kinematic Viscosity micro m^2/sec ft^2/sec Thermal Conductivity (IND) W/m-K BTU/hr-ft-F Thermal Conductivity (GSI) W/m-K BTU/hr-ft-F Refractive Index (Lamda=1) --- --- Static Dielectric Constant --- --- Surface Tension milli N/m lbf/ft Joule-Thomson Coef K/Pa F/psi Isothermal Joule-Thom Coef kJ/kg-Pa BTU/lbm-psi