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IAPWS R7-97 Steam Work Or Heat Power

Calculate IAPWS R7-97 steam work or heat power for a general system from temperature, pressure and mass flow rate.

The heat or work power is calculated from the change of enthalpy between the inlet and outlet fluids. Check the phase of the inlet and outlet fluid. The enthalpy change is positive if heat or work is added to the system, and negative if heat or work are removed from the system.

Note : There is an anomaly in the steam calculation for region 3 between the saturated vapour line, the region 2/3 boundary, and the critical pressure. Refer to the region 3 anomaly help page for more details (click the utility button on the data bar). IAPWS R7-97 is intended for industrial use, and is a simplified version of IAPWS R6-95 for scientific use. IAPWS R7-97 was developed as an improvement of the IFC-67 model.

Reference : IAPWS R7-97 Industrial Formulation for thermodynamic Properties of Water and Steam

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CALCULATOR : IAPWS R7-97 Saturated Steam [FREE]   ±

Calculate steam saturation pressure and temperature (IAPWS R7-97 section 8).

The saturation point can be calculated from either the saturation temperature, or the saturation pressure. The calculation is valid between 273.15 K, and the critical point, 647.096 K. Use the Result Plot option to plot the steam temperature and pressure and steam properties versus either temperature or pressure.

Note : The speed of sound is not calculated for liquid vapour mixtures.

Tool Input

  • anomtype : Region 2/3 Anomaly Type
  • proptype : Steam Phase
    • Xu : User Defined Saturated Steam Quality
  • sattype : Saturation Pressure Type
    • Psu : User Defined Saturation Pressure
    • Tsu : User Defined Saturation Temperature

Tool Output

  • ρ : Density
  • Cp : Specific Heat Constant Pressure
  • Cp-Cv : Delta Specific Heat (Cp - Cv)
  • Cp/Cv : Specific Heat Ratio
  • Cv : Specific Heat Constant Volume
  • Ps : Saturation Pressure
  • Ts : Saturation Temperature
  • Vc : Speed Of Sound
  • Z : Compressibility Factor
  • cvg : Convergence Check
  • h : Enthalpy
  • s : Entropy
  • u : Internal Energy
  • vg : Mole Specific Volume
  • vm : Specific Volume
  • wv : Specific Weight

CALCULATOR : IAPWS R7-97 Steam Table [FREE]   ±

Calculate steam table from temperature and pressure (IAPWS R7-97 Steam Table).

Steam table values can be calculated for water and steam, saturated water, saturated steam, saturated water and steam, metastable water, and metastable steam. The calculations for water and steam are valid between 273.15 K and 1073.15 K (0 to 100 MPa), and between 1073.15 K and 2273.15 K (0 to 50 MPa).

The saturated water and steam calculations are valid between 273.15 K and 647.096 K.

The metastable calculation is valid between 273.15 K and 647.096 K, and for pressure from the saturated vapour line to the 5% equilibium moisture line (user defined). Use the Result Plot option to plot the steam properties versus temperature and pressure.

Tool Input

  • anomtype : Region 2/3 Anomaly Type
  • proptype : Steam Phase
    • Pu : User Defined Pressure
    • Tu : User Defined Temperature
    • Xu : User Defined Saturated Steam Quality

Tool Output

  • ρ : Density
  • Cp : Specific Heat Constant Pressure
  • Cp-Cv : Delta Specific Heat (Cp - Cv)
  • Cp/Cv : Specific Heat Ratio
  • Cv : Specific Heat Constant Volume
  • P : Pressure
  • T : Temperature
  • Vc : Speed Of Sound
  • Z : Compressibility Factor
  • cvg : Convergence Check
  • h : Enthalpy
  • s : Entropy
  • u : Internal Energy
  • vg : Mole Specific Volume
  • vm : Specific Volume
  • wv : Specific Weight

CALCULATOR : IAPWS R7-97 Steam Work Or Heat Power [PLUS]   ±

Calculate steam power from inlet and outlet temperature and pressure, and mass flow rate (IAPWS R7-97 Steam Table).

The steam power is calculated from the change in enthalpy. The enthalpy change is positive if heat or work is added to the system, and negative if heat or work is removed from the system. Use the Result Plot option to plot steam power versus mass flow rate.

Tool Input

  • anomtype : Region 2/3 Anomaly Type
  • proptypei : Inlet Steam Phase
    • Piu : User Defined Inlet Pressure
    • Tiu : User Defined Inlet Temperature
    • Xiu : User Defined Inlet Steam Quality
  • proptypeo : Outlet Steam Phase
    • Pou : User Defined Outlet Pressure
    • Tou : User Defined Outlet Temperature
    • Xou : User Defined Outlet Steam Quality
  • modetype : Fluid Property Type
  • dfactype : Design Factor Type
    • Du : User Defined Design Factor
  • m : Mass Flow Rate

Tool Output

  • ρ : Density
  • Cp : Specific Heat Constant Pressure
  • Cp-Cv : Delta Specific (Cp - Cv)
  • Cp/Cv : Specific Heat Ratio
  • Cv : Specific Heat Constant Volume
  • D : Design Factor
  • Pi : Inlet Pressure
  • Po : Outlet Pressure
  • Q : Delta Heat Or Work Power (Including Design Factor)
  • Ti : Inlet Temperature
  • To : Outlet Temperature
  • Vc : Speed Of Sound
  • Z : Compressibility Factor
  • cvg : Convergence Check
  • h : Enthalpy
  • hΔ : Delta Enthalpy
  • s : Entropy
  • sΔ : Delta Entropy
  • u : Internal Energy
  • vg : Mole Specific Volume
  • vm : Specific Volume
  • wv : Specific Weight