06-18-2008, 04:29 AM
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#21 (permalink)
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EcoModding Apprentice
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88CRX - '88 Honda CRX Standard DX 90 day: 32.74 mpg (US) IS250 - '07 Lexus IS250 90 day: 25.79 mpg (US) RX300 - '00 Lexus RX300 90 day: 18.38 mpg (US)
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Quote:
Originally Posted by ebacherville
OH man what a great idea.. really the CRX is not to much heavier than these thing snad probably more areo efficient..
I want one of these things .. Just make it a 3 wheeler and they can sell them her eint he USA.. 3 wheeler 3 seats would suffice great here int he USA.. if they prove to be safe enough as a three wheeler we have a argument for allowing 4 wheelers to be legalized..
Id feel far safer in one of those than a motorcycle .. Plus out of the weather  |
Great Point it's probably safer then a motorcycle
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06-18-2008, 04:30 AM
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#22 (permalink)
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EcoModding Apprentice
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88CRX - '88 Honda CRX Standard DX 90 day: 32.74 mpg (US) IS250 - '07 Lexus IS250 90 day: 25.79 mpg (US) RX300 - '00 Lexus RX300 90 day: 18.38 mpg (US)
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Quote:
Originally Posted by MPaulHolmes
In L.A., if they compress the air from the atmosphere, then when it's released in the car's exhaust, it won't meet air quality standards. hehe
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HAH!!! that probaly true also
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09-24-2010, 03:22 AM
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#23 (permalink)
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EcoModding Lurker
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Only problem I see with it is...
compressed air tanks are big bombs! They'd have to be subjected to the same sorts of design / test / build standards nuclear waste WIPP transport containers are... Wonder how many bars they put in and how big. Major safety issue IMOP
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09-24-2010, 08:41 AM
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#24 (permalink)
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And a tank full of gas is a big fire hazard! Any form of stored energy can be extremely dangerous. This is nothing new. Those tanks can take quite the impact before anything bad happens to them. The weak point is the valve/head. I'm sure it wouldn't take much to create a solid protective cage around it. They do the same for EV batteries, gas tanks, the civic GX's natural gas tank... |
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09-24-2010, 08:54 AM
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#25 (permalink)
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Quote:
Originally Posted by nmgolfer
Only problem I see with it is compressed air tanks are big bombs! Wonder how many bars they put in and how big.
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Automotive high pressure Hydrogen tanks, and Low pressure Propane tanks already exist that are DOT approved. ??? But it would still depend on the tank pressure needed for the air. ??? |
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09-24-2010, 07:49 PM
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#26 (permalink)
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Quote:
Originally Posted by sawickm
Automotive high pressure Hydrogen tanks, and Low pressure Propane tanks already exist that are DOT approved. ??? But it would still depend on the tank pressure needed for the air. ???
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The way to store hydrogen for use in vehicles is in metal hydrides:
United Nuclear - Hydrogen Fuel Systems
totally safe...
No... compressed air scares the heck out of me... I much rather sit on liquid fuel tank... Empty gas tanks are far more dangerous than full ones but nothing like a compressed air tank... Have a look at welding tanks .... those are what the air tanks would have to look like... and then electric batteries start looking much better! No losses compressing the air either which would need to be factored in .... Air motors are efficient (gas turbines have amazing power to size / weight ) but I suspect electric motors are more efficient ... (longer time to recharge though) |
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09-24-2010, 10:56 PM
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#27 (permalink)
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Quote:
Originally Posted by nmgolfer
No... compressed air scares the heck out of me...
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A carbon fiber tank rated at 10,000psi is what I had in mind: Quantum Technologies - Products |
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09-24-2010, 11:19 PM
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#28 (permalink)
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All other fuels have to mix with air before releasing most of their energy. Even LNG has a relatively trivial energy of compression. Compressed air, OTOH, has all of the energy available instantly, like dynamite. SCUBA tanks are regulated much more stringently than aircraft parts for this reason. If you take one in to be re-filled, and the shop sees a hint of damage, they drill a hole in it, so nobody can fill it.
If this wasn't a stock fraud, I'd worry about whole traffic jams and parking lots going up in a chain reaction.
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09-24-2010, 11:33 PM
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#29 (permalink)
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Master EcoModder
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The whole concept of using compressed air as a storage medium is not very efficient. If my memory serves, the compressed air only stores about 40% of the (electrical?) energy you put into it. Pretty poor ratio...
And, the tank has to weight a big boatload? How far can a 60-80 gallon tank at 2500PSI take you? And talk about lack of infrastructure; it's almost as hard as hydrogen.
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09-25-2010, 01:58 PM
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#30 (permalink)
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Quote:
Originally Posted by Daox
The weak point is the valve/head. I'm sure it wouldn't take much to create a solid protective cage around it. They do the same for EV batteries, gas tanks, the civic GX's natural gas tank...
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You can't create a cage that's solid enough to survive any collision - it'd weigh so much it's no longer viable.
On a compressed air tank, you could make (a) rather large weak area(s) where it'd tear open in an emergency.
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