Storage of Compressed Natural Gas (CNG) on Board a Vehicle.
Federal Motor Vehicle Safety Standards (FMVSS) 304 of US Department of Transportation (DOT) and Canadian Standards Association International (CSA) acting with American National Standards Institute (ANSI) through standards CSA B51-09 and Natural Gas Vehicles (NGV)-2-2007 regulate the design of storage tanks.The usual storage pressure for vehicular natural gas in the USA and Canada is 248 Bar (3,600 psi). In other areas of the world it is generally 200 Bar (2,950 psi).
An estimated ranking of popular designs, based on material properties.
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Gasoline Gallon Equivalent (GGE) or Diesel Gallon Equivalent (DGE)
This term is used to describe the equivalency of non-gasoline energy sources. 1GGE is the amount of alternative energy required to equal 1 gallon of gasoline. 1 GGE of natural gas weighs 2.567 Kg or 5.660 lbs and has 900 BTU/Cubic ft and a density of 0.0417-0.0447 lb/cu.ft. at atmospheric pressure. Using the gas law, the equivalent GGE at 3,600 psi (248 Bar) is Approximately 0.517 cubic foot or 14.4 liters of gas volume called Water Volume. Our tables use 14.4 liter of internal volume as one GGE and may be different from others.