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Recent content by DJB82

  1. DJB82

    Calculation of gas pressure increase

    Hi David, Correct me if I'm not right but should that formula be P1=P2(m1/(m1+mgas)) rather than P2=P1(m1/(m1+mgas))? If not then that would mean that P2<P1 Thanks
  2. DJB82

    Calculation of gas pressure increase

    Thanks for the excellent reply. Can you explain why V2 = (V1 / (V1 + Vg))), rather than V2 = V1 - Vg, I'm a little confused on this. Thanks
  3. DJB82

    Dead volume?

    Thanks for the reply. The type of filter I'm talking about is a bag type filter, with the filtrate outlet built into the floor of the filter housing. Therefore, from your description it sounds like my dead volume is negligible.
  4. DJB82

    Calculation of gas pressure increase

    So dividing the volume of gas emitted in litres by the free headspace volume in the vessel would be an incorrect way to work out the pressure increase in barg?
  5. DJB82

    Dead volume?

    What exactly is the dead volme of a filter?
  6. DJB82

    Calculation of gas pressure increase

    There is a liquid in a reactor and the headspace is occupied by nitrogen. The gauge pressure in the headspace is 0barg. If the liquid then emitted a known quantity of e.g. CO2 into the headspace how would I work out the pressure increase in the headspace?
  7. DJB82

    Reactor Abatement Calculations

    All, I was wondering if anyone would be able to recommend suitable software for calculating of process reactor abatement emissions, for different activities within the vessel i.e. heating, pressurisation etc. (assumming the vessel has certain reagents/solvents contained within. Basically I want...
  8. DJB82

    Pump Pressure and Head

    Thanks for taking time to reply. I understand that different pumps can give much different flowrates even though the pressures may be similar. However if the pressures are similar and if the head is also similar then is this not where the pump curve for the specific pump in question comes into...
  9. DJB82

    Pump Pressure and Head

    Thank you everyone for taking the time to respond, much appreciated. I've been reviewing your comments and doing a lot of reading on the different types of head (static,dynamic, elevation)in relation to pumps, so as to develop my knowledge. I was wondering if anyone could help me again with the...
  10. DJB82

    Pump Pressure and Head

    The energy provided by a pump is measured in terms of head. This is independent of the liquid density. How would you prove this from a mathematical point of view. The formula for static head has a density term in it. So then how could head not be related to density. Any help clarifying this...
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