Re: LN2-Powered Cryocar vs Hydrogen-Powered Fuel Cells or I.C.E.s

[Frederick Sparber]

 

http://www.ch-iv.com/lng/cc9408.htm

NITROGEN (-320°F)

" Nitrogen is probably the most common cryogen handled. Liquid nitrogen is commonly produced by "distilling" it from liquid air. This distillation process also produces liquid oxygen and sometimes liquid argon. Once liquefied the nitrogen can be shipped in bulk to other locations by railcar or trailer. You have probably been behind a liquid nitrogen trailer, labeled Nitrogen Refrigerated Liquid, many times on the highway. Once at its destination it can be used as a cryogenic liquid but most often it is vaporized and used as a gas.

Nitrogen has many uses, but the bulk of it is consumed by the chemical, electronics and food industries. Nitrogen is often used in chemical and petrochemical facilities as a blanket, purge, or dry gas because it is inert and water-free. Again, its inert properties make it ideal for the manufacture of semiconductors and other clean processes. Liquid nitrogen plays a major role in the flash freezing of food to minimize product damage and dehydration. Nitrogen gas is injected into the aluminum cans containing non-carbonated drinks to provide the internal pressure necessary to minimize denting. Nitrogen injected into food packaging can prevent food discoloration, maintain crispness, and general product degradation. "

http://www.deutsches-museum.de/ausstell/dauer/physik/e_luft.htm

 

"The version of Linde's machine from 1906 on display here includes improvements designed to boost the machine's efficiency: The air is compressed in two stages (right), with a low-pressure compressor that compresses incoming air to 20 bar, and a high-pressure compressor that raises the pressure to up to 200 bar. The high-pressure air initially passes through a precooler (middle) and into the countercurrent apparatus. In the first throttle valve, it relaxes to 20 bar and partially liquefies. Part of the low-pressure air remaining that has not yet liquefied precools incoming high-pressure air in the countercurrent cooler and is fed back to the high-pressure compressor after it passes through the precooler. Another portion of the remaining air is relaxed in a second throttle valve together with air that has already liquefied and is also partially liquefied. The remaining portion has a cooling effect in the countercurrent apparatus and escapes into the open air."

 

psi	BAR	KPa	Atm		Bar	psi	Kpa	Atm
1	0.069	6.89	0.068		1	15	100	0.99

Or  Hydrogen??   :-) 

http://www.linde-gas.com/International/Web/LG/COM/likelgcomn.nsf/DocByAlias/prod_hydrogenprojects_700barfillingstation

"10.000 PSI / 700 bar Filling Station

Linde has created the world’s first hydrogen filling station using 700-bar technology for the Adam Opel AG. This represents an important milestone on the road to the hydrogen-powered car society.

In comparison to the usual 350 bar (5,000 PSI) systems, the higher storage density of the 700-bar technology extends the range of a fuel cell vehicle by 60 to 70%.
This advance gives the fuel cell vehicle a range of over 400 km (250 miles), which is one of the most important pre-requisites for widespread use of cars powered by compressed hydrogen.

The filling station, in the Opel test centre at Dudenhofen near Offenbach, Germany, was designed and built as a turnkey project by Linde. "

A veritable bomb even without a spark!

Fill'er up Scotty.   :-)

Frederick