CNG pump compressor DIY home refueling

[P-hack]

biodiesel suppliers are paying $0.10/gallon for used cooking oil, not gonna beat that with cng.
Selling cooking oil to turn profit, power generators | NJBIZ

[vlad]

Originally Posted by P-hack

biodiesel suppliers are paying $0.10/gallon for used cooking oil, not gonna beat that with cng.
Selling cooking oil to turn profit, power generators | NJBIZ

I was thinking about cooking oil but all I could find was 55-60 cents for liter of filtered used oil. And even then there is non around... Also I don't want to run around restaurants with a bucket. For me will be easier to come home connect to my pump and be ready for next day.

The other reason I don't like WVO is it works the best in old trucks. Newer will bring more PITA than savings....

[P-hack]

Well the problems are not insurmountable, obviously, but someone will have to invest the time/energy/money to sort it all out for the DIY crowd and identify all the risks along the way (and not kill anyone in the process). All that is intimidating enough to be a non-starter for a lot of people, don't you think? Especially with 500 psi adsorption already being road tested in numbers?

Energtek Completes Lengthy Urban Field Trial of CNG Lite(TM) - Bloomberg

If I knew some more details about it I might put one on my scooter.

[vlad]

The problem is more political and bureaucratical than technical. Just like toroidal cng tanks used all over the world but US and Canada. You know we have different physics laws here. In Europe convert carb vehicle to propane cost $500 and propane injection system is $1200 installed. This is really funny we can fly to other planet but can't make cheap pump for CNG. It smells very fishy......

But the reality is we live here and now and I don't want to wait until that better time...
Let's move on

[P-hack]

ok, stop talking and start doing then

[vlad]

What do you think I am doing right now? Correct... collecting more data and educating myself to be ready....

[P-hack]

Have you called the g-tec folks for prices on tanks and refuellers? Any idea of the gallons of gasoline equivalent of their adsorption tanks? (and vibration resistance?)

http://www.gas-tec.com/cylinders.html

Looks like two ng-130 tanks will get you there, no? at 275 psi no less.

[vlad]

Originally Posted by P-hack

Have you called the g-tec folks for prices on tanks and refuellers? Any idea of the gallons of gasoline equivalent of their adsorption tanks? (and vibration resistance?)

cylinders

Looks like two ng-130 tanks will get you there, no?

The biggest one is 130 ft3, so it is just a bit over 1 GGE. It is about 2.5 ft3.
@ 275 Psi it holds 130 ft3 of gas

275/14.7=18.7 compression
18.7*2.5=47 ft3 regular 2.5 tank with the same compression rate

130/47=2.8 times

This adsorption technology allows to push 2.8 times of gas to the same volume compare to just empty cylinder.... This is not bad at all but the problem is as it states at their web site:

"G-TEC Adsorbed Natural Gas Cylinders are for industrial applications - they are not used for automobiles, trucks, forklifts or other vehicular applications."

I have no idea how this tanks will behave in vehicular applications... But we are getting there....

[P-hack]

I would be interested to know what you find out about the pricing when you call them. They talk about trucking them across town, so might not be an issue except for liability (which reminds me, do you need a placard on your truck for cng?)

[vlad]

Originally Posted by P-hack

I would be interested to know what you find out about the pricing when you call them.

Check this out:

http://www.gas-tec.com/FM100%20New%2...Checkvalve.pdf

You can clearly see they use AC compressor in there refueler...

Now we need to find what compressor they used???