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  United States  73069
• Authors:
  • Hashemi, H T
  • Wesson, H R
• Publication Date: 1972-3-28

Media Info

• Features: References;
• Pagination: 23 p.

Subject/Index Terms

• TRT Terms: Boil off; Fuel storage; Hazardous materials; Liquefied natural gas
• Old TRIS Terms: Lng boil off; Lng storage
• Subject Areas: Freight Transportation; Marine Transportation; Safety and Human Factors;

Filing Info

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