Liquid nitrogen engine | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-07-04

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Liquid_nitrogen_engine


00:01:20 1 Description
00:03:12 2 Criticisms
00:03:22 2.1 Cost of production
00:03:53 2.2 Energy density of liquid nitrogen
00:06:11 2.3 Frost formation
00:06:59 2.4 Safety
00:08:21 2.5 Tanks
00:09:31 2.6 Emission output
00:10:09 3 Advantages
00:11:45 4 Disadvantages
00:12:32 5 Other Uses
00:13:20 6 See also
00:13:52 7 Further reading



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SUMMARY
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A liquid nitrogen vehicle is powered by liquid nitrogen, which is stored in a tank. Traditional nitrogen engine designs work 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 motor. Vehicles propelled by liquid nitrogen have been demonstrated, but are not used commercially. One such vehicle, Liquid Air was demonstrated in 1902.
Liquid nitrogen propulsion may also be incorporated in hybrid systems, e.g., battery electric propulsion and fuel tanks to recharge the batteries. This kind of system is called a hybrid liquid nitrogen-electric propulsion. Additionally, regenerative braking can also be used in conjunction with this system.
In June 2016 trials will begin in London, UK on supermarket J. Sainsbury's fleet of food delivery vehicles:  using a Dearman nitrogen engine to provide power for the cooling of food cargo when the vehicle is stationary and the main engine is off. Currently delivery lorries mostly have second smaller diesel engines to power cooling when the main engine is off.