This app is available for Android and Apple-iOS, and is designed for comfortable use. The calculations of the thermodynamic properties are 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 intended to be used by students and engineers in their daily work.
To learn more about the "International Steam Tables - IAPWS-IF97" app visit our website www.thermodynamics-zittau.de for a detailed User's Guide.
Features of the "International Steam Tables - IAPWS-IF97" app:
The following combinations of input variables can be chosen:
Pressure p and temperature t
Pressure p and vapor fraction x in wet steam region
Temperature t and vapor fraction x in wet steam region
Pressure p and specific enthalpy h
Pressure p and specific entropy s
Specific enthalpy h and specific entropy s
Specific internal energy u and specific volume v
Specific enthalpy h and specific volume v
The user just edits the values of the input variables and all results are calculated automatically. See the screenshots below this text 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
Specific internal energy u
Specific enthalpy h
Specific entropy s
Specific isobaric heat capacity cp
Specific isochoric heat capacity cv
Isentropic exponent kappa
Speed of sound w
Isobaric cubic expansion coefficient alpha_v
Isothermal compressibility kappa_t
Thermal conductivity lambda
Dynamic viscosity eta
Kinematic viscosity ny
Prandtl number Pr
Thermal diffusivity a
The calculated properties are displayed in a scrollable view. The user just needs to scroll down to see all the results. See the screenshots below for details.
If the user switches from one input variable combination to another the previously given or calculated values will be assigned to the new input values and the output is being calculated automatically. For example, if the user calculates a certain state point from pressure p and temperature t and switches to a calculation from pressure p and specific entropy s afterwards, the previously calculated value for s (from p and t) will be assigned as input value for s. This eases the calculation of thermodynamic processes in which one property is kept constant, e. g. of an isentropic expansion.
The user can choose SI or I-P unit systems. In addition a variety of other units are available,
K, °C, °F, °R for Temperature,
MPa, bar, psi, atm for pressure,
kg, lb for mass,
kJ, Btu, ft lbf, kcal for energy.
All units can be selected independently but the user might also switch between SI and IP unit system for all properties with just one tap. See the screenshots below this text for details.
Unit conversions will be effective immediately.
A detailed User's Guide explains the features and capabilities of this App. View the User's guide online on www.thermodynamics-zittau.de.
The main properties that can be calculate are temperature, pressure, volume, density, enthalpy, entropy, internal energy, Cp, Cv, sound speed, Gibbs energy and Helmoltz energy.
Based on steam table IAPWS IF-97.
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THIS IS A PROFESSIONNAL APP, even it is free. Allows much more calculation cases than any other free app (and even pay one).
Each calculation is made with a precision of 10^-10, even close to the critical point and high pressure, as major professional app.
This app allow to calculate thermodynamic steam properties of steam and/or water, with following inputs:
=> Pressure + Temperature
=> Pressure + Enthalpy
=> Pressure + Entropy
=> Temperature + Volume
=> Temperature + Entropy
=> Enthalpy + Entropy
And, for calculation at saturation:
=> Quality + Pressure
=> Quality + Temperature
You can also calculate transformation of water or steam by heating, cooling, pressure reduction, flash, ...
Please send me any crash / suggestion / improvement
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Ter voorkoming van te grote snelheden, erosie en waterslag in het condensaat retoursysteem na de condenspot(ten) moet deze leiding een minimale doorsnede hebben.
Immers condensaat van een hogere druk vóór de condenspot komt in een lagere druk na de condenspot waardoor een deel van dit condensaat verdampt en dus stoom wordt.
Grote snelheden van een mengsel van stoom en condensaat veroorzaken snelle slijtage van het condensaat retourleidingnet en soms zelfs waterslag.
Met deze app kan onder andere de minimum diameter worden berekend
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