REQUIREMENTS
- Requires iOS 12.1 or later. Compatible with iPhone.
FEATURES
- Implements the mathematical formulation from the IAPWS-IF97 to calculate the properties of steam.
- Calculates 17 Thermodynamic and Transport properties of steam.
- Calculations all over the range of the IAPWS-IF97, or just the two-phase region including liquid and vapor saturation states.
- It allows for 14 combinations of thermodynamic properties to be entered.
- Validates each calculation informing the user of the range of values to be entered in case of an invalid input.
- It manages and converts results and inputs between the SI (metric) and I-P (English) System of Units.
- Results can be sent by email along with a comma-separated value (CSV) file.
DOWNLOADS
Steam IF97 performs calculations of Thermodynamic and Transport properties of steam based on the latest IAPWS-IF97 Formulation and IAPWS releases.
Given a combination of two thermodynamic properties, it calculates 17 Thermodynamic and Transport properties of steam.
The numerical results obtained are suitable for engineering, scientific or industrial use.
MAIN FEATURES
-
Performs all the calculations implementing the latest mathematical formulations from the IAPWS (International Association for the Properties of Water and Steam) Industrial formulation (Revision 2007):
- Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam.
- Properties of steam, water and ice from the Industrial Formulation IAPWS-IF97, the Scientific Formulation IAPWS-95, IAPWS Formulation 2008 and IAPWS Formulation 2006. Properties of dry air are from the NIST Reference equation of Lemmon et al.
-
Calculations operate in two modes:
- General Properties: Input and Output values are all over the range of the IAPWS-IF97 Formulation.
- Saturation Properties: Input and Output values are on the range of the two-phase region (region 4) of the IAPWS-IF97 Formulation, including saturation values of liquid and vapor.
-
Allows for 14 different combinations of thermodynamic properties to be entered as input parameters:
- Temperature / Pressure
- Temperature / Specific Enthalpy
- Temperature / Specific Internal Energy
- Temperature / Specific Entropy
- Temperature / Specific Volume
- Temperature / Vapor Fraction
- Pressure / Specific Enthalpy
- Pressure / Specific Internal Energy
- Pressure / Specific Entropy
- Pressure / Specific Volume
- Pressure / Vapor Fraction
- Specific Enthalpy / Specific Entropy
- Specific Enthalpy / Specific Volume
- Specific Internal Energy / Specific Volume
- Supports input parameters and calculation results in both the SI (metric) and the I-P (English) system of units.
- For each combination of input thermodynamic properties, it calculates and provides the user with information about the appropriate input values in the valid range of computations.
- Results can be sent by email in an HTML file along with a comma-separated value (CSV) file.
SYSTEM OF UNITS
Thermodynamic variables in the SI (metric) system of units can be entered and/or the calculation results can be displayed in the following units:
- Pressure: Pa, kPa, bar, mmHg
- Temperature: °C, K
- Specific Enthalpy: kJ/kg, J/kg, kcal/kg
- Specific Entropy: kJ/(kg·K), J/(kg·K), kcal/(kg·K)
- Specific Internal Energy: kJ/kg, J/kg, kcal/kg
- Specific Volume: m³/kg, cm³/g, l/kg
- Density: kg/m³, g/cm³, kg/l
- Speed of Sound: m/s, km/h
- Dynamic Viscosity: Pa·s, kg/(m·s), P
- Kinematic Viscosity: m²/s, St
- Thermal Conductivity: W/(m·K), kcal/(m·s·K)
- Thermal Diffusivity: m²/s, m²/h
Thermodynamic variables in the I-P (English) system of units can be entered and/or the calculation results can be displayed in the following units:
- Pressure: psi, inHg, inH2O, atm
- Temperature: °F, °R
- Specific Enthalpy: Btu/lbm, ft lbf/lbm
- Specific Entropy: Btu/(lbm·°R), ft lbf/(lbm·°R)
- Specific Internal Energy: Btu/lbm, ft lbf/lbm
- Specific Volume: ft³/lbm, in³/lbm, gal(US)/lbm
- Density: lbm/ft³, lbm/in³, lbm/gal(US)
- Speed of Sound: ft/s, mile/h
- Dynamic Viscosity: lbm/(ft·s), lbf·s/ft²
- Kinematic Viscosity: ft²/s, ft²/h
- Thermal Conductivity: Btu/(ft·h·°R), W/(in·°F)
- Thermal Diffusivity: ft²/s, ft²/h
Output Variables
- Vapor Fraction
- Temperature
- Pressure
- Specific Volume
- Density
- Specific Enthalpy
- Specific Entropy
- Specific Internal Energy
- Isobaric Heat Capacity
- Isobaric Cubic Expansion Coefficient
- Isentropic Exponent
- Isothermal Compressibility
- Thermal Conductivity
- Thermal Diffusivity
- Dynamic Viscosity
- Kinematic Viscosity
- Prandtl Number
- IAPWS-IF97 Region
For the calculation of Saturation Properties, it calculates all the properties shown above for results in region 4 of the IAPWS-IF97 Formulation, and the same properties for the Saturated Liquid State and Saturated Vapor States.
Range of Input/Output Variables (SI)
|
Property |
Valid range |
Units |
|---|---|---|
|
Temperature |
0 ≤ T ≤ 2000 |
°C |
|
Pressure |
610 ≤ P ≤ 100.0E6 |
Pa |
|
Specific Enthalpy |
-41.5878 ≤ h ≤ 2810.0E3 |
J/kg |
|
Specific Internal Energy |
-282.7252 ≤ u ≤ 6327.862E3 |
J/kg |
|
Specific Entropy |
-8.5823 ≤ s ≤ 13905.8727 |
J/(kg·K) |
|
Specific Volume |
1.00007E-4 ≤ v ≤ 1719.8658 |
m³/kg |
|
Vapor Fraction |
0 ≤ x ≤ 1.0 |
kg/kg |
Range of Input/Output Variables (I-P)
|
Property |
Valid range |
Units |
|---|---|---|
|
Temperature |
32.0 ≤ T ≤ 3632.0 |
°F |
|
Pressure |
0.088473 ≤ P ≤ 1450.4 |
psi |
|
Specific Enthalpy |
-0.0178795 ≤ h ≤ 3171.5306 |
Btu/lbm |
|
Specific Internal Energy |
-0.12155 ≤ u ≤ 2720.491 |
Btu/lbm |
|
Specific Entropy |
-0.0020498 ≤ h ≤ 3.32136 |
Btu/(lbm·°R) |
|
Specific Volume |
1.601958E-2 ≤ v ≤ 27549.6 |
ft³/lbm |
|
Vapor Fraction |
0 ≤ x ≤ 1.0 |
lb/lb |
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