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Recent content by flsanders

  1. flsanders

    Calculation of Fan work by VdP and the adiabatic process where PV^(gamma) = Constant; which is OK?

    Thanks Chicopee and georgeverghese I think I am a bit further now in my understanding. When I was comparing the 1. adiabatic model 2. and the isothermal model I was making one crucial mistake (I think); I used the same efficiency coefficient. But in fact for the isothermal model I should use...
  2. flsanders

    Calculation of Fan work by VdP and the adiabatic process where PV^(gamma) = Constant; which is OK?

    I was talking about a fan; axial or radial with a dP of max 20kPa. But in principle I want to understand why the work I calculate wit the adiabatic model is less than for the W=VdP calculation.
  3. flsanders

    Calculation of Fan work by VdP and the adiabatic process where PV^(gamma) = Constant; which is OK?

    Yes, this I know. But for now I am confused on a more general level about why the adiabatic compression model is not suitable for my fan calculation.
  4. flsanders

    Calculation of Fan work by VdP and the adiabatic process where PV^(gamma) = Constant; which is OK?

    Dear forum I have been trying to calculate the work done by a fan on a gas flow in two ways, but I get two different values of power. The first method is the W=V * dP (I guess this is assuming isothermal compression). I then use the power calculated as a measure of the internal energy...
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