International Steam Tables

The "International Steam Tables - IAPWS-IF97" app has been developed by lively members of the International Association for the Properties of Water and Steam (IAPWS) at the Zittau/Goerlitz University of Applied Sciences. The analysis group at the Department of Technical Thermodynamics in Zittau participated in the improvement of the "Industrial Formulation IAPWS-IF97 for the Properties of Water and Steam" and developed 4 supplementary requirements for backward equations.

This app is obtainable for Android and Apple-iOS, and is designed for comfortable use. The calculations of the thermodynamic properties are primarily based on the Industrial Formulation IAPWS-IF97 and cover its full range of validity. In addition, transport properties, thermodynamic derivatives, and backward functions can be calculated.

This app is meant to be used by college students and engineers in their every day work.

To be taught more about the "International Steam Tables - IAPWS-IF97" app visit our website www.thermodynamics-zittau.de for a detailed User's Guide.

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Features of the "International Steam Tables - IAPWS-IF97" app:

The following combinations of enter variables can be chosen:

Pressure p and temperature t

Pressure p and vapor fraction x in wet steam area

Temperature t and vapor fraction x in moist steam area

Pressure p and particular enthalpy h

Pressure p and particular entropy s

Specific enthalpy h and particular entropy s

Specific internal vitality u and specific quantity v

Specific enthalpy h and particular quantity v

The consumer just edits the values of the enter variables and all results are calculated automatically. See the screenshots below this textual content for details.

Depending on the given pair of input variables the following properties will be calculated:

Pressure p or saturation pressure ps

Temperature t or saturation temperature ts

Vapor fraction x

Specific volume v

Density rho

Specific inner vitality u

Specific enthalpy h

Specific entropy s

Specific isobaric warmth capability cp

Specific isochoric heat capability cv

Isentropic exponent kappa

Speed of sound w

Isobaric cubic growth coefficient alpha_v

Isothermal compressibility kappa_t

Thermal conductivity lambda

Dynamic viscosity eta

Kinematic viscosity ny

Prandtl quantity Pr

Thermal diffusivity a

The calculated properties are displayed in a scrollable view. The user simply wants to scroll down to see all the outcomes. See the screenshots below for particulars.

If the person switches from one input variable combination to one other the previously given or calculated values will be assigned to the new enter values and the output is being calculated mechanically. For example, if the user calculates a certain state point from pressure p and temperature t and switches to a calculation from strain p and particular entropy s afterwards, the previously calculated value for s (from p and t) will be assigned as input worth for s. This eases the calculation of thermodynamic processes in which one property is saved fixed, e. g. of an isentropic growth.

The user can select SI or I-P unit techniques. In addition a variety of other models are available,

e.g.

K, °C, °F, °R for Temperature,

MPa, bar, psi, atm for stress,

kg, lb for mass,

kJ, Btu, ft lbf, kcal for vitality.

All items can be selected independently however the consumer may additionally change between SI and IP unit system for all properties with just one tap. See the screenshots below this textual content for details.

Unit conversions will be efficient instantly.

A detailed User's Guide explains the features and capabilities of this App. View the User's guide online on www.thermodynamics-zittau.de.