Interesting new concept car-runs on compressed air

[pack-rat]

Interesting new concept car-runs on compressed "air"

link here : http://www.theaircar.com/

thoughts ?

 

[enigma]

I find it telling that the link to the 'thermodynamics' details is dead.

Who knows though. There is nothing that says that compressed air couldn't be used to power a car, it's just a matter of harvestable energy.

 

[Janitor]

The website says: "Although a number dates have been released to the media in the past, the programme required some more time to complete."

That is usually not a good sign.

 

[chronon]

So let's see if I've got this right. I don't know how much energy can be extracted from compressed gas, but my guess is PV/2. (Correct me if I'm horribly wrong) The tank is 100 litres $$(0.1m^3)$$ at 300 atmospheres $$(3.10^7 pascals)$$. That gives 1.5 megajoules of energy (less than half a kilowatt hour). A car battery can hold more than twice as much and a single litre of petrol gives more than ten times as much. They claim to be able to do 300 km, so that's 5000 J/km. When cycling I would expect to use about $$10^5 J/km$$. Must be an amazing design!

 

[Ivan Seeking]

Another recent thread on this.

https://www.physicsforums.com/showthread.php?t=34250

 

[pack-rat]

Hi sry i am relatively new here. I didn't know this was posted here before.

 

[Rampantbaboon]

it should probably work the same basic way as a steam engine, as that just heats wather to make compressed water vapor

 

[brewnog]

And a petrol engine effectively does the same thing too, - heating air to compress it (in a roundabout kinda way), the resulting expansion driving a piston. The key difference is the way the air, steam or whatever, is given its energy.

 

[Averagesupernova]

Many years ago I heard Paul Harvey hype such a thing. It was bragged up and was mentioned that it's emissions were non-existant. I thought it was goofy at the time and I still do. Energy of some sort is spent on compressing the air to begin with.

 

[jjrwilliams]

using wing effect technology, what would be the best thrust motor. one that is in the front or in the back of the aircraft.
how could one get a higher level of flight from the use of wig technology?

 

[jjrwilliams]

using wing effect technology, what would be the best thrust motor. one that is in the front or in the back of the aircraft.
how could one get a higher level of flight from the use of wig technology?[/QUOTE