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Fuel evaporation in a tank - Pressure calculation

  1. Apr 14, 2015 #1
    Hello everybody,

    I have the following problem:

    I have a fuel tank, with a liquid phase (the fuel) and gas phase at To and P0, where T is temperature and P pressure. I assume that the gas phase at the instant t=t0 is air.
    (Is this assumption correct?)

    The temperature of the liquid phase varies over the time with a certain profile from T0 to Tend.
    The fuel due to the increasing of the temperature evaporates with a certain law (most probably unknown).

    How can I calculate the equilibrium pressure between the two phases according to the temperature changes over the time?

    Thanks in advance,
  2. jcsd
  3. Apr 14, 2015 #2


    User Avatar

    Staff: Mentor

    Welcome to PF!

    I would think you wouldn't calculate it but rather just look up the vapor pressure in a table of the fuel's properties.
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