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    Thermodynamic and thermophysical calculator.
    Allows you to calculate thermodynamic properties:
    - Temperature, Pressure, Volume, Vapour Fraction, Enthalpy, Entropy by Peng-Robinson (1975) EOS
    - Liquid density by Yen-Woods eq.
    - Heat of evaporation (EOS)
    - Cp – heat capacity isobaric (EOS)
    - Cv – heat capacity isochoric (EOS)
    - sonic speed (EOS)
    - adiabatic coefficient (EOS)
    Thermophysical properties:
    - Thermal conductivity (Stiel-Thodost eq. for gases, polynomial for liquid)
    - Viscosity (Jossi-Stiel-Thodost eq. for gases, polynomial for liquid)
    - Surface tension (Guggenheim-Katayama)
    You can calculate thermodynamic characteristics of some apparatus:
    - Heat exchanger
    - Isoenthalpic valve
    - Polytropic compressor
    - Isothermal compressor (multistage)
    - Polytropic expander

    Extensive macro language (Description:, Samples:
    JavaScript support:

    You can save calculations on disk in html format.

    Available elements for calculations:
    methane, ethane, propane, i-butane, n-butane, n-pentane, i-pentane, n-hexane, n-heptane, n-octane, R134a, R11, R12, R13, R21, R22, R23, R507, nitrogen, ammonia, oxygen, argon, xenon, neon, H2O, acetone, F6S.
    You can edit the elements or create a new element.

    Integrated calculator with plotter -
    Can solve a system of non-linear equations. More information here:

    Manual (rus)

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