Liquid hydrogen tank car

A liquid hydrogen tank car, also called liquid hydrogen tank wagon or liquid hydrogen tanker wagon is a railroad tank car designed to carry cryogenic liquid hydrogen (LH2). LH2 tank cars with a capacity of 17,000 pounds (7,711 kg) are used for transcontinental transport.[1][2]

Design

The pressure within the tank is 25 psi (170 kPa) or lower[3][4] with a temperature below 20.27 K (−423.17 °F or −252.87 °C) and a boil-off rate of 0.3% to 0.6% per day[5] The tank is double walled like a vacuum flask with multi-layer insulation, with the valves and fittings enclosed in a cabinet at the lower side or end of the car.

Classes

Cryogenic liquid tank cars in the USA are classified as follows:[6]

  • DOT-113 tank cars (Cryogenic liquid tank cars)[7]
  • AAR-204W tank cars (Cryogenic liquid tank cars)[8]
  • AAR-204XT (Inside Box Car)
gollark: Maybe SRAs are the *real* SCP-2950.
gollark: Also, Prometheus Labs best GoI.
gollark: Some people say they're a Prometheus Labs product, others say they're some weird SCP where their inventor was wiped out by a temporal change but the SRAs kept existing, some say they were invented in the 1800s, some in the 1900s or early 2000s, and some say they run on enslaved reality benders.
gollark: Also, I'm not sure we should trust them when nobody even knows exactly when or where they were made?
gollark: Those really just seem cheaty and overdone.

See also

References

  1. "Toward a liquid hydrogen fuel economy-Pag.9" (PDF). deepblue.lib.umich.edu. Retrieved 2015-04-06.
  2. "http://deepblue.lib.umich.edu/bitstream/2027.42/5800/4/bac5758.0001.001.txt". deepblue.lib.umich.edu. Retrieved 2015-04-06. External link in |title= (help)
  3. Cryogenic rail tank cars Pag.3
  4. Spencer, A.B.; Colonna, G.R. (2003). NFPA Pocket Guide to Hazardous Materials. National Fire Protection Association. p. 59. ISBN 9780877655589. Retrieved 2015-04-06.
  5. "Costs of storing and transporting hydrogen Pag.50" (PDF). www1.eere.energy.gov. Retrieved 2015-04-06.
  6. "Field guide to rail cars". Archived from the original on 2008-12-20. Retrieved 2015-04-06.
  7. "eCFR Code of Federal Regulations | DOT113". ecfr.gpoaccess.gov. Archived from the original on 2012-04-02. Retrieved 2015-04-06.
  8. "Railroad tank car specification marking system" (PDF). henrycoema.org. Retrieved 2015-04-06.
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