I understood the sentence as referring to some pneumatic version of regenerative braking, but admittedly it was unclear.
What amazes me with this compressed air energy storage thing is that it is so dead simple, isn't there a catch somewhere? Let's see how much energy they store in their 300 litres at 300 atmospheres, it's P*V isn't it? P*V= 300*10^5Pa * 0.3m^3 =~ 10^7 J = 10^7 W.s = 10^4 kW.s Mmmm... only about 10000/3600 =~ 3 kWh???? Which is wrong, me or Jed's beloved Wikipedia? http://en.wikipedia.org/wiki/Compressed_air_vehicle : "300 litre air at 300 bar only amounts to about 12kWh (the equivalent of 1.4 litre (0.37 gallons) of gasoline)" Probably me, the maths must be more complicated than P*V... correction welcome. Michel ----- Original Message ----- From: "Jed Rothwell" <[EMAIL PROTECTED]> To: <vortex-l@eskimo.com>; <vortex-l@eskimo.com> Sent: Thursday, January 10, 2008 3:57 PM Subject: Re: [Vo]:Photos of Guy Negre's compressed air car on CNET News.com >A Cnet report: > >>Fill'er up: >>http://www.news.com/2300-11389_3-6225395-4.html?tag=ne.gall.pg > > This one says: > > "Here's where you fill 'er up with compressed air. The air drives the pistons > in the engine, and > the engine returns the favor by recompressing air for later use." > > A perpetual motion machine! > > These reporters are such idiots. > > - Jed >
