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Hi John, welcome to justanswer.com
This would be an expensive proposition...much more costly than jut purchasing a CNG Generator and transfer switch.
But since that's not what you asked...I'm working on your question.
Interesting...will see what I can do and let you know. FYI, I know it's may be considered a big payout for the customer but the experts only get a portion of what you are charged, the site gets the rest.
John, the only way to not make my answers public it to offer additional services which when you accept, we can communicate privately.
Thanks John, it's all pretty straight forward, though I like to look on the bright side I was afraid this is where we were going so I will opt out, let me know if you change your mind. Good luck with your project.
Hi i can help you with that but it would be public. That said, nothing in that is patentable or secret.
I don't do live phone call. Only asynchronous message.
As for commiting, the site is not working like that. We commit our time by giving an answer (and follow up if needed to that answer until you are satisfied) and then you pay if you think it was worth it.
Normally i would paste my answer here but i did not initially because you mentioned you wanted it to be private.
And you know that without wanting to discuss with me :) I was just asking for confirmation that you are ok with this being public. I can't help otherwise (you can always complain to the site management, i bothered them many time for the option to keep discussion private).
As i mentioned earlier, i don't do call. I will start to say what i can on the matter of compressed natural gas and just ask for precision on that. First i don't have detail on the system you have in mind. Some are mechanically linked to the drive train, some go all electric before reaching the wheel. In the first case there is always a little alternator build in for electric subsystem but not much in therm of power.
To be able to get real electrical power (as i assume this is the kind of power you are interested in ) the two more efficient methodes are:
Using a turbine as the generator. The second one would be to use a fuel cell type of direct natural gas to electricity (some companie, as an example http://www.bloomenergy.com/ can sell you those thing). It work by using a ceramic surface really hot as a catalyst. GE is working on similar concept: http://spectrum.ieee.org/energywise/green-tech/fuel-cells/ge-claims-fuel-cell-breakthrough-starts-pilot-production
On the cheaper but less efficient methode, you can always use an explosion engine and put an alternator on the shaft, or do the same with a steam engine but i would then find it a waste of fuel because a steam engine could use fuel lot cheaper.
As far as using the already on board electricity generating part of a natural gas car, you can intercept the power at the alternator or next to the batteries but one will have to annalyse any charge regulator that may interfere with the wanted energy output and implement overload protection to not damage the car electronics.