coming up HHO Generators for your car
the dark side of the lightest element in
the universe
none other than hydrogen the power
source for the Sun can you generate this
in your own engine bay and save money on
fuel or is it all just pseudo scientific
bullshit I get asked about hho
generators all the time here's the most
recent such question from a guy named
Mark I have been watching many videos on
YouTube regarding the use of hho
generators in vehicles could you please
give us the pros and cons on this I'm
John Cadogan from Auto expert comdata
you the place where I see new car buyers
save thousands off their next new cars
hit me up on the website for that
and now jihad on bullshit captain's log
stardate 3.14159265 for executive
summary HHO generators are bullshit
because they do not work they do not
work because scientifically they cannot
work you will not save any money you
will not save any fuel you can buy a
so-called hho generator on eBay etc like
this one claiming to produce four litres
a minute for from mere 250 bucks
slightly under so if you've got the hots
for what's in the box with the dots you
should know that such a device probably
will use electricity from your car and
electrolyze water to produce both
hydrogen gas and oxygen gas two liters
of hydrogen for every liter of oxygen
because that's just how water rolls when
it decomposes electrolytically you
probably can pump it into your engine
and burn it combustion converts it back
into water and releases energy there's
already a hell of a lot of water and
exhaust so it's not going to be a
problem and this might make you feel
really good it might emotionally empower
you in some perceived acid metric
conflict with big evil oil but it will
not save you any fuel and it could
be very very dangerous here's why
spoiler alert we have to use the T word
it's a big scary word - thermodynamics
spooky there are four laws numbered
perversely 0 through 3 inclusive
defining the behavior of energy
everywhere the Leatherman surge of heat
and energy interaction that's what they
are we only need to use one of those
laws though thankfully number one the
first law of thermodynamics says that if
you put a box around a system and energy
cannot get into or out of the box then
the total amount of energy in the system
doesn't change and that seems reasonable
and it is observational e true
essentially everywhere
let's leave sort of the Big Bang and
black holes out of it temporarily and
keep our feet here firmly on planet
earth the first law is essentially the
anything that sounds too good to be true
almost certainly is law so let's put one
of those boxes around your car no energy
and no energy out and let's make it an
ideal car with an ideal engine where all
of the energy and the fuel gets turned
into motion 100% efficiency no losses
wouldn't that be nice in this case every
kilojoules of energy in the field gets
converted with 100% efficiency into
motion and the first law is very happy
indeed but obviously there are losses in
the real world right otherwise you'd
never need to fill up at the fuel
station engines really good ones are
really only about 25 percent efficient
you lose 75 percent of the energy in the
fuel mainly as internal friction and
waste heat mainly as heat this rolling
resistance transmission losses
aerodynamic drag and of course the
driver ultimately hits the brakes which
turns all of your residual kinetic
energy into waste heat which you throw
outside the box by bleeding it off into
the surrounding air in other words the
box leaks energy that you lose like a
sieve which is why car owners need to
keep filling up the fuel tank
but the first law is still happy with
this because it allows you to pump
energy into the box or drain energy away
from the box just like water going into
and out of a dam the only thing you're
not allowed to do is magic up energy
conveniently from nowhere like Harry
Potter with a wand in the box that's not
allowed so let's just put a box around
the engine
you've got chemical potential energy
coming in from the fuel you've got
rotational kinetic energy leaving the
box via the crankshaft and a bunch of
mechanical losses mainly waste heat
leaving via the radiator and the exhaust
pipe okay
let's put a magic HHO generator inside
the box with the engine it's exactly the
same scenario here energy in from the
fuel energy out from the crank and waste
heat leaking like a sieve nothing
actually changes so unless the hho
generator has a means of reducing the
waste heat or other losses it will never
be able to deliver more energy at the
crankshaft and it is impossible for the
hho generator to do this and here's why
the electricity required to electrolyze
the water to split it up into so-called
hho comes from the car's battery and the
electricity in the battery comes from
the alternator which is driven by the
engine so let's put the battery
alternator and hho generator in a
thermodynamic energy box just for kicks
energy comes into the system from the
belt driving the alternator energy goes
out in the form of chemical energy in
the HHO ready to burn the belt loses
about 10 percent of its input energy and
friction the alternator is also not
especially efficient because efficiency
is not really as important as robustness
in the context of alternator design and
operation but a typical alternator might
be capable of producing a maximum of 120
amps at 13 point 5 volts that's about
1.6 kilowatts and trust me on this you
cannot put a 1.6 kilowatt electoral
under the bonnet bad idea because there
is not anything like this spare
electrical capacity in the system
available for you to exploit with any
accessory you will kill the electrical
system if you try this so this is an
entirely generous proposition for the
hho generator the best small scale
industrial alkaline electrolyzers which
in ebay electrolyzer is frankly not even
close to being is about 50% efficient so
the chemical potential energy in the so
called HHO coming out of the most overly
generous under bonnet electrolyzer is
going to be about 800 watts that's about
one horsepower and of course if you burn
it in the engine about 75 percent gets
chucked out of that box because engines
are only 25 percent efficient leaving
you with about 200 watts of actual
motive power at the crankshaft so just
to be perfectly clear on this you need
to burn enough petrol to produce 3000
watts of crankshaft power to drive a
belt which loses about 10% of the way to
the alternator the alternator gets 2700
watts of belt power and produces about
1600 watts of electricity the so-called
hho generator turns 1600 watts of
electricity into 800 watts of
combustible chemicals and the engine
turns those chemicals into 200 watts of
motive power and this is the most
unrealistically powerful HHO generator
you could hope to install so we started
with 3 kilowatts of motive power at the
crank and we turn it into 200 watts of
motive power with an hho generator
speaking as an engineer this is not a
blueprint for increased efficiency and
hho generator is nothing more than a
device allowing you to throw even more
energy out of the box before it gets to
the wheels it's hard to make power at
the crank it's really stupid to throw it
away once you get it there and that is
really all that an hho generated
us-a system offering you the unique
opportunity to throw 94 percent of the
energy it consumes straight outside the
box and this is being exceptionally
generous unrealistically generous just
leave the hho generator out of the car
and instead of 200 watts of motive power
you get 3 kilowatts that's a plan and to
all of you who saw our but the hho
generator uses waste electricity excess
electricity from the alternator spare
electricity I am so sorry that you are
so profoundly scientifically illiterate
there is no spare electricity in a
functioning alternator the current
ratings are the maximum the alternator
will produce the actual production of
electricity by an alternator is a direct
response to electrical load in other
words alternators produce zero
electricity when they are not powering
anything if you flick on all the lights
the front and red and Mister you crank
the fan on the HVAC or they start
working hard
those alternators and that's how they
roll all of you budding engineers saying
that you could use regenerative braking
to make the electricity to electrolyze
the water well yeah you could do this
but in practice it's just easier and
more efficient to break regenerative Li
and store that energy in a battery
because fewer losses you could plaster
the roof the bonnet and the boot with
photovoltaic cells and use that
- yeah but incident sunlight is only
about 1 kilowatt for every square meter
and there's maybe 2 square meters of
viable real estate on an average car and
the cells well they are only going to be
about 20% conversion efficiency so
that's going to be 400 watts of input
electricity but only when you are parked
in bright sunlight probably not worth
doing really and it would be a visual
abomination let's not forget that so
apart from being completely ineffective
and hho generator will cost
you money it'll probably shorten the
life of your alternator void your
warranty and pose a significant fire
risk an ideal stoichiometric mixture of
hydrogen gas and oxygen gas plumbed by
the some amateur through the engine bay
in close proximity to all that heat
vibration airflow and electricity what
could possibly go wrong and when the
insurance investigator gets done with
looking into that inevitable fire he
discovers the charred remnants of your
ill-fated daily on with my dynamics good
luck getting the insurance company to
pay your claim the differential
confirmation that these things are
bullshit is simply that car makers do
not install them routinely as a means of
extracting greater efficiency from an
internal combustion engine twenty maybe
thirty years ago someone invented
electronic fuel injection carburetors
were thrown out and it's been adopted on
all engines because it achieves
essentially this efficiency increase
greater efficiency if hho worked and you
thought of it you tender it out for
eight figures and a car maker would buy
it but unfortunately it does not work
these things are 13 different flavors of
bad idea neatly gift wrapped in a
gobsmacking thermodynamic fraud waiting
for some scientifically illiterate
Muppet to hit by now do not be that
Muppet I'm John Cadogan I hope this
helps thanks for watching
you
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