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Recent content by John31415

  1. John31415

    Cost as a function of pressure.

    The concrete question is how much does a 10-bar, 30-bar and 80-bar pump cost assuming we can control for everything else (such as flow etc). Representative numbers are good just trying to get a feeling.
  2. John31415

    Cost as a function of pressure.

    I can;t find any concrete numbers there :)
  3. John31415

    Cost as a function of pressure.

    Hi, Can anyone point me to a comparison of the cost of pumps as a function of pressure (all else being kept constant). For example, is it cheaper to use two 10bar pumps or one 20-bar pump (ignoring station cost) and how do these numbers scale with pressure and number of pumps. If a complete...
  4. John31415

    Energy to pressurize.

    I'm not sure that they are mutually exclusive. Don't losses and power add up to 1? The system has mechanical losses due to efficiency problems so you have to subtract them from the amount of fluid power realistically available.
  5. John31415

    Energy to pressurize.

    Fair enough:) I'm looking to get some intuition for various pressures of sea water. It seems that the higher the pressure the higher expected losses should be. Would you have a (rough) estimate of the losses for 10,50,100 bar? Obviously, the pump cost varies immensely however I'm not sure how...
  6. John31415

    Energy to pressurize.

    Sorry if this is a stupid question: What is the energy cost as a function of pressure. I.e., how much more energy does it take to pressure to Y bar as opposed to Y/2 bar. It seems like it should be a linear function but there are no doubt losses..
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