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“Small Amount of Hydrogen”

 

          This week I received an email questioning how such a small amount of hydrogen can do any good.  Below is the email discussion.  His comments are in black and my comments are in red.

 

Fran

 

I really love your website due to the tremendous amount of information on HHO and the various tests that you and others have performed.  It’s what is so lacking on other websites and Ebay generator offers, though good looking, are also appallingly and inadequately presented.

 

I agree.  I also shun the term HHO because it is also a relative new comer.

 

What I would really like to know is at what proportion HHO should be mixed with petrol to ensure the benefits that you report? I have a Volvo 850 SE with 225,000 on the clock and realise that subject to compression and seal testing it may not be the best candidate for a hybrid conversion.  However, it is a 1993 model with only a MAF sensor (no O2 on exhaust) so the ECU may be easier to fool. 

 

I also shun the term “fool the ECU” used by new comers.

 

 It may also pre-date an OBD2 analysis and so the Scanguage or other electronics might not suit.

 

Scangauge certainly will not work on your car.

 

My basic maths tells me that a 2 liter engine at 3000 RPM and an HHO generator of min. 2 liters/p/min would give a 1:3000 ratio of HHO:air/gas p/min by total volume. 

 

A 2 liter engine at 2000 rpm inhales less than 1000 liters of air per minute at full throttle.  At typical cruise throttle the manifold vacuum is typically 15 inches Hg (approximately one half atmosphere) therefore the engine is only inhaling 500 liters of air per minute.  Approximately 20% of that air is oxygen.  So 20% x 500 liters = 100 liters of oxygen per minute.  Now the two liters of Browns gas per minute available with our smallest system does not sound like such a small proportion at 1:50 does it?  At idle this is more like 1:12.

 

 Is this enough to get the minimum 15% fuel saving that you say is possible?

 

I also say that adding a hydrogen generator alone will not likely increase your mileage unless the vehicle is operated primarily under “stressed combustion.”  The rest of the system is needed to take advantage of what the hydrogen can do for the engine.

 

 What of higher RPMs?   I just find it hard to believe that such a small input of HHO can achieve a significant fuel saving.

 

We actually recommend not producing as much gas as is possible because we have seen optimum gas production to be somewhat lower than maximum. 

 

If you are able to offer any clarification, albeit something in your Newsletter that I might have missed, I would greatly appreciate your time and help in resolving this.

 

Maybe I should write a newsletter with the above discussion.  Do I have your permission?

 

Looking forward,

 

Fran

 

Regards

 

Adam East

Eastwood Services

 

Fran’s comments:  A 5% hydrogen in oxygen mixture at standard temperature and pressure (STP) is said by most experts to be combustible, and that is with the hydrogen being the only combustion fuel in the reaction.  In the combustion chamber of an engine the gases are compressed closer together which increases the reactivity as does the increased temperature of compression.  So a much lower % of hydrogen would be needed than at STP.  Also the gasoline (petrol) in the combustion chamber will contribute to the combustion, so even less hydrogen would be needed to have a beneficial contribution to the combustion.  It doesn’t take a lot of hydrogen to do the job if you have stressed combustion.  Our experience has shown that one liter per minute production of Browns gas will suffice for every 2.5 liters of engine displacement.  For diesel it is even less because the compression ratio is much higher and the RPMs are much lower.  However many of our competitors’ unit cannot produce this much hydrogen and many others are so inefficient that producing hydrogen require 6 times as much electrical power as our units require.  High efficiency and high gas production in a small enough package to fit under the hood of today’s car is a challenge but we have met that challenge, unlike most of our competitors.  Of course we’ve been at it for over eight years and most of them jumped on the band wagon in the last couple years. 

 

 

 

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