UncleHoney
Full time employment: Posting here.
The car's small onboard compressor can be plugged in at home, it will refill the air tank in about 4 hours at a cost of $2 in electricity.
At 10cents/KwH, this would draw 22.8 Amps on 220v circuit running continuously for 4 hours. Must be one heck of a big tank or compressor. But if the range is 90 miles for the $2 charge, then it is only costing 2.2 cents/mile. If it were top become commercially viable, when the oil companies get thru, the 3 minute fill up will be $40, and they still won't wipe your windshield.
I spent a few years in the pressure vessel industry early in my career, and have witnessed many high-pressure tests, some of them to failure. We always filled the vessel with water to within a half-inch of the top before airing them up to design (or failure) pressure. You can't compress a liquid, so it limited the amount of compressed air in the cylinder) Even so, some of the failures were spectacular- a veritable exposion of air and water until all the air was out of the tank and internal/external pressures equalized.
Having millions of 4500psig compressed gas CF or FRP tanks on the highway would scare the hell out of me. You wouldn't need to call 911 in the event of a collision, the expoding tank(s) would notify them for you. Kinda like Onstar, but you wouldn't have to pay for it.
The DOT has very strict rules about transporting high pressure cylinders. . And imagine a chain reaction in a crowded parking garage when the first one went off, and the shrapnel pierced a few others....Turning the masses loose with them is incomprehensible in our regulatory climate- and millions of mobile compressed air bombs would be every terrorist's wet dream.
Nope, think we should pass on this one.
You'll be pleased to know there are about 150,000 compressed natural gas powered cars and trucks running around the country every day. They typically run about 3200 psi in their storage tanks.
And to boot there are about 1600 compressed natural gas "filling stations" around the country.