found: Work cat: Kojima, M. Breathing clean : considering the switch to natural gas buses, 2001:p. 9 (In order to store sufficient natural gas on board a vehicle to achieve an adequate driving range, natural gas must be stored in high pressure tanks as compressed natural gas (CNG) or as cryogenic liquefied natural gas (LNG) in a highly insulated dewar)
found: Guidebook for evaluating, selecting, and implementing fuel choices for transit bus operations, 1998:p. 25 (The fuel metering systems of commercially available heavy-duty natural gas engines require that the fuel be supplied at pressures not less than 90 to 100 psi. ... In onboard LNG systems, two approaches are in use for supplying the necessary fuel pressure: mechanical cryogenic fuel pumps and pumpless fuel systems using conditioned (heated) fuel. ... Pumpless LNG tank systems are now most commonly specified. These systems require that the fuel be heated approximately 50°F (10°C) above its natural boiling point before it is supplied to the vehicle. The heating increases the saturation vapor pressure of the fuel to approximately 100 psi)
found: Safe handling of compressed gases in the laboratory and plant, 2011:p. 2 (A compressed gas is defined by the Department of Transportation (DOT) as "any material or mixture which exerts in the packaging an absolute pressure of 280 kPa (40.6 psia) or greater at 20°C (68°F)")
found: OCLC, Jan. 10, 2013(natural gas buses; natural gas powered buses)
