alt.energy.renewable

Vaughn Simon wrote:
> "Anthony Matonak" wrote in message
> news:47dc03a8$0$1110$4c368faf@roadrunner.com...
>> I would suppose that they either use a regulator to deliver lower
>> (say 50 atmospheres) pressure to the engine at all times or they
>> use a modulated valve that delivers variable amounts of tank pressure
>> air to the engine.
>
> Both methods involve expanding the air without extracting useful work from it
> in the process, and both methods will decrease the temperature of the air,
> unless space-robbing heat exchangers are provided. In other words, both methods
> introduce significant losses to a system that already must have large losses.

What's wrong with space-robbing heat exchangers? They could make them
pretty big without adding a huge amount of weight and the electric fans
they would require could be run off a relatively small battery. The
thing requires massive heat exchangers for the intercoolers anyhow.

Anthony