24-02-2010, 07:12 PM
30-05-2010, 02:45 PM
A liquid nitrogen vehicle is powered by liquid nitrogen, which is stored in a tank.The engine works by heating the liquid nitrogen in a heat exchanger, extracting heat from the ambient air and using the resulting pressurized gas to operate a piston or rotary engine. This article examines several energy conversion processes to provide sufficient energy to develop viable liquid nitrogen-powered vehicles.A multiple-reheat open Rankine cycle and a closed Brayton cycle are studied to use Liquid Nitrogen as a non-polluting fuel. These are concentrated to cryogenic heat engines. an automobile was converted to run on liquid nitrogen in 1997 as a proof of the principle of using liquid nitrogen as a fuel. Earlier work has shown that the energy available by operating various thermodynamic cycles between atmospheric temperature and liquid nitrogen temperatures (77 K) can provide more energy per unit mass than is available from current lead-acid batteries and some projected battery technologies.
Energy density of liquid nitrogen
Liquid nitrogen as an energy store has a low energy density because the process relies on a phase-change of a substance. The energy density †derived from nitrogen's isobaric heat of vaporization and specific heat in gaseous state is about 97 watt-hours per kilogram (W-hr/kg).
Emission output
a liquid nitrogen vehicle displaces the emission source from the vehicle's tail pipe to the central electrical generating plant. The net production of pollutants can be reduced Where emissions-free sources are available. Emission control measures at a central generating plant may be more effective and less costly than treating the emissions of widely-dispersed vehicles.
A Car Powered by Liquid Nitrogen:
, this developmental zero emission vehicle employs a cryogenic heat engine and is fueled by liquid nitrogen. This research was funded by the Texas Advanced Technology Program.
for further details, visit these links:
http://saetechnical/papers/1999-01-2517
http://en.wikipediawiki/Liquid_nitrogen_vehicle
http://sequencezeroL2N/L2NMap.html
http://mtsc.unt.edu/CooLN2Car.html
Energy density of liquid nitrogen
Liquid nitrogen as an energy store has a low energy density because the process relies on a phase-change of a substance. The energy density †derived from nitrogen's isobaric heat of vaporization and specific heat in gaseous state is about 97 watt-hours per kilogram (W-hr/kg).
Emission output
a liquid nitrogen vehicle displaces the emission source from the vehicle's tail pipe to the central electrical generating plant. The net production of pollutants can be reduced Where emissions-free sources are available. Emission control measures at a central generating plant may be more effective and less costly than treating the emissions of widely-dispersed vehicles.
A Car Powered by Liquid Nitrogen:
, this developmental zero emission vehicle employs a cryogenic heat engine and is fueled by liquid nitrogen. This research was funded by the Texas Advanced Technology Program.
for further details, visit these links:
http://saetechnical/papers/1999-01-2517
http://en.wikipediawiki/Liquid_nitrogen_vehicle
http://sequencezeroL2N/L2NMap.html
http://mtsc.unt.edu/CooLN2Car.html