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  1. RE

    carbon dioxide transport

    Thank you all very much for the valuable answers!!! Trying to be synthetic I was very short in giving details. First, I forgot to give the std. condition: 1 atm abs. and 0°C, sorry (Montemayor is right). Second: the whole panorama is as follows: the CO2 is the by product of the conditioning of...
  2. RE

    carbon dioxide transport

    We have to transport 250000 std m3/day of CO2 (@ atmospheric pressure and 50 °C) fron one site to other, 90 km apart. There are two option: 1) compress de gas and send it in a pipeline, 2)condense the CO2 and send it as liquid in a smaller pipeline or by truck; and vaporize at the other end...
  3. RE

    Pump efficiency prediction

    Hi, smckennz Thank you very much for your reply. I found that theory is aprox. OK for flow rates larger and lower than BEP. At BEP same efficiency is inconsistent.
  4. RE

    Pump efficiency prediction

    The similarity rules for centrifugal pumps dictate that homologous operating points of a certain pumps (changing velocity) have same efficiency. Starting at BEP of a pump runing, say, 1750 rpm (max. efficiency = 80%), the similarity rules predict that there must be an homologous operating point...
  5. RE

    Vertical cold plate natural convection

    I am working in natural convection on a vertical plate. The problem is how to calculate the heat transfer coefficient. Invariably text books give correlations bassed on Nusselt, Grashof, and Prandtl numbers for a hot plate in a cold fluid (gas or liquid). What happened with a cold plate in a hot...

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