[NewCandle] BG and electrolysis
Jones Beene
jonesb9 at pacbell.net
Fri Aug 4 12:37:42 EDT 2006
Just to clear up an important point IF the claims for
hydroboosting do pan out,
in previous post (looking for an 'arguable' explanation) instead
of this:
> I don't think that BG is all that special in itself - except
> than in an ICE the added mobility of H2, and the order of
> magnitude faster burn rate (flame speed) assures that the 6-10%
> of unburned fuel in any auto engine - plus the monoxide (CO)
> gets completely burned.
> That is more significant when you do the final ratio and final
> accounting in terms of the burned fuel not carrying any
> additional losses (compressive and volumetric efficiency) -
> which have already been figured into the original Carnot
> efficiency ! - IOW it is all gravy, so that even a minimum 6%
> extra fuel available to be burned can look more like an 18%
> increase in Carnot.
What I meant to say was this:
You have an ICE with a Carnot efficiency of 25%
You have 6% hydrocarbons in the exhaust, before reaching the
catalytic converter - which is unburned or incomplete combustion.
The converter reduces these to ppm.
This is about the average for all new cars in the USA. Diesels
have both higher Carnot and higher % unburned fuel.
In the case of gasoline the underlying reason for the incomplete
combustion is fuel "wetting" against the relatively cool metal of
the piston and cylinder head, which quenches combustion within
that interface. In the case of diesels, the underlying reason for
incomplete combustion is carbon particulates in the fuel. These
clog up catalytic converters and are the main reason that diesels
cannot pass the EPA tests and be used here. Biodiesel has none of
the particulates, by the way.
In case you are wondering, I used to hang out at the CalStart
facility in Alameda (near where I was living) and got first hand
info, mainly from a visiting Ford engineer who was demo-ing their
H-powered ICE engine. This was before the current infatuation with
hydroboosting - and Ford was using pressurized H2. Alameda had the
only hydrogen filing-station in California at the time.
OK. Back to the correction. The reason that onboard hydrogen
should be able to be made with onboard electrolysis, and the
associated drain to the alternator -which is itself only 75%
efficient, and still benefit the net mileage attainable is that
the 6% unburned fuel - already has the associated 75% Carnot
losses figured in - so that most of the newfound energy goes to
raise the Carnot from 25% to 30% (you do not get the full
pass-through). AND you can eliminate the catalytic converter ! So
what was looking like only a 6% gain, now looks closer to 20% more
power per unit of consumption (mileage). I think I got that right
this time. And that is if nothing else (oxidizers) figures into
the equation.
This is why I am at total loss as to why Nick's outfit only got
marginal gains - *especially when using H2 supplemented from a
tank* - that makes no sense !unless the original engine was
extremely efficient, and had much less than normal HCs in the
exhaust. You can accomplish the lower HC levels by using a
hot -engine - i.e. ceramic pistons and heads, but not in a normal
aluminum engine.
Jones
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