[opendtv] Re: Analysis: Broadcast TV Faces Struggle to Stay Viable
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Mon, 9 Mar 2009 11:10:55 -0400
Bob Miller wrote:
> You can have a whole train of modules each with its own
> air storage and engine. Depending on the laws in your
> area you could theoretically have any length and carry
> as many kegs as you want.
>
> No need for this to be a small vehicle. You could scale
> it up to whatever.
>
> If refueling is quick and you can get near 200 miles per
> fill up what's not to like. No pollution, no carrying
> the extra weight of gas, iron engines or batteries and
> the extra structural weight they require
Not so fast. How can anyone claim "no pollution." This compressed air
engine requires energy to compress the air. Every single BTU you think
you can extract out of the compressed air tank can only originate from
the energy used in compressing the air at the outset. The air itself
does not provide any chemical exothermic reaction here, as gasoline or
even H2 would. There is no latent energy in the air itself, other than
the pressure it was pumped up to.
So the moral of the story is, you have to feed all the energy used by
all vehicles "fueling up" at the compressed air station *to* those
compressed air stations.
If you can feed those compressed air stations with renewable energy
only, like wind or solar, then this would result in a "no pollution"
system. Otherwise, all it does is to shift the pollution generation from
the vehicle to the power plant.
And, similar to the H2 schemes floating around, you have to worry the
details of keeping such highly compressed air bottled up for long
periods of time, potentially, to make this viable.
Bert
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