08-10-2014, 02:51 PM
Liquid Nitrogen Vehicle
Liquid Nitrogen Vehicle.ppt (Size: 328.5 KB / Downloads: 81)
Introduction
Liquid Nitrogen Vehicle is a ingenious vehicle which uses Cryogenic fluid (liquid nitrogen) as a working fluid.
Propulsion system is a cryogenic heat engine in which a cryogenic substance is used as a heat sink.
Liquid nitrogen is generated by cryogenic or reversed Stirling engine coolers that liquefy the main component of air, nitrogen (N2). The cooler can be powered by electricity or through direct mechanical work from hydro or wind turbines.
Methodology
Normal, atmospheric air is passed through dust precipitator and pre-cooled
It is then compressed inside large turbo pumps to about 100 atmospheres(10.13 MPa).
Once the air has been cooled to room temperature it is allowed to expand rapidly through a nozzle into an insulated chamber.
By running several cycles the temperature of the chamber becomes low enough. The air entering it starts to liquefy.
Liquid nitrogen is removed from the chamber by fractional distillation and is stored inside well-insulated Dewar flasks.
Future Scope
The big difference is that a liquid-nitrogen car is likely to be considerably cheaper to build than an electric vehicle.
For another, because it needs no bulky traction batteries, it would be lighter and cheaper still than an electric vehicle.
Safety and research fund will require to finally run this vehicle on road.
Conclusion
In a real sense, the more such vehicles are used, the cleaner the air will become.
In addition to the environmental impact of these vehicles, refueling using current technology can take only a few minutes, which is very similar to current gas refueling times.
Extra research work is needed to utilize the most of the available energy.