EFFECT OF BAROMETRIC PRESSURE CHANGES ON BOIL-OFF IN AN LNG STORAGE TANK

A reduction in the absolute pressure of an atmospheric LNG storage tank caused by declining barometric pressure may substantially increase the rate of boil-off in the storage tank. A model is presented which relates quantitatively the rate of excess boil-off to the magnitude of absolute pressure reductions in an LNG storage tank. The model predicts that even a relatively severe decline of the barometric pressure (two inches of mercury in one hour), results in a boil-off rate which is within the design venting capacity of most existing LNG storage tanks. From this, a procedure is outlined for sizing the boil off handling system that is conservative even though it gives much lower results than calculations based on thermodynamic equilibrium.

  • Corporate Authors:

    University Engineers, Incorporated

    1215 Westheimer Drive
    Norman, OK  USA  73069
  • Authors:
    • Hashemi, H T
    • Wesson, H R
  • Publication Date: 1972-3-28

Media Info

  • Features: References;
  • Pagination: 23 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00046156
  • Record Type: Publication
  • Source Agency: University Engineers, Incorporated
  • Files: TRIS
  • Created Date: Oct 31 1973 12:00AM