Present-day practice in cargo tank venting is reviewed. It is pointed out that a new approach to tank venting and the dispersal of effluent is needed, and the solution to this problem must not be related to the prevailing wind, the frequency of adverse atmospheric conditions, or the juxtaposition of deck or shore structures and tank vents. The design must include a self-contained means of ejecting the gas with sufficient momentum at the outlet to ensure that upward movement of the plume will cause adequate mixing with the surrounding air-even if this is stagnant. From calculations it is clear that higher velocities must produce proportionate benefits. To achieve this a series of fixed nozzles could be used on the vent outlet, but practical difficulties in fitting different nozzles for differing loading rates prohibit this. Therefore a variable rectangular nozzle is considered the answer. A typical installation of such a nozzle is shown.

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  • Corporate Authors:

    Engineering, Chemical and Marine Press, Limited

    33-39 Bowling Green Lane
    London EC1P 1AH,   England 
  • Publication Date: 1970-3

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Filing Info

  • Accession Number: 00015231
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: May 7 1972 12:00AM