Hybrid Car – More Fun with Less Gas

need more power grr - Page 2

register ::  Login Password  :: Lost Password?
Posted by Curbie on June 19, 2011, 6:45 am
 
z,

I got stuff on G3, GEK and FEMA gasifies if you want them and a bunch
of random research you're welcome to.

Curbie

Posted by z on June 19, 2011, 8:07 am
 


i might call on you for those..I need to do more reading on the subject.  
Since it's a fire of some kind i'm a bit worried on how to control sparks
etc.. it's that funny time here where fire season is almost upon us, but
it's still wet enough we can burn, but in a few weeks that will be done.

I need a power system that takes over from the time between wet and dry ..
but I don't screw around with any kind of fire potential even in early fire
season. I did plenty of years fighting fires to know how fast it can get
away from you

but hell if I can make a basic generator out of it i'm sure it'd be well
used some times of year!

cheers

-Zachary in Oregon

Posted by Winston on June 19, 2011, 5:25 pm
 z wrote:

Also, you can make your own natural gas 24/7/365..  Interested?
Scrub the CO2 from biogas and you get methane which is 95% of natural gas!

Methane is in constant production all around us.  You have heard stories about
'swamp gas' leaking from garbage dump
sites.  That is 'biogas'. Cities around the world are capturing it for it's
energy content.  Biogas contains about 60%
methane. Nearly 40% is carbon dioxide. As you can imagine, the energy content of
this mixture is little more than half
that of pure methane.  The biogas is normally used in this form worldwide but
you can increase it's energy content and
deodorize it for your use.

A 'methane digester' accepts your feedstock and converts it to biogas.  Enter
this phrase into your search engine to
locate more information.

Burning the biogas converts it into carbon dioxide which is 20 times less
dangerous as a 'greenhouse gas' than the
methane that would have been vented to the atmosphere anyway.  All plumbing
parts of your digester are of stainless
steel, plastic, copper or rubber.  Avoid brass parts because the acidic nature
of the gas will leach lead and will
corrode the parts.

Safety First!  Provide two or more safety valves that will vent the gas to
atmosphere should pressure in the digester
exceed a reasonable limit. (That can be as low as 1 PSIG for some containers.)

The methane ingredient is lighter than air; any inadvertent leakage must be
conducted up to the sky without there being
any opportunity for it to come into contact with any form of ignition like heat,
sparks or open flame.

The most practical feedstock for your methane digester is 'ensilaged grass'.
This is merely grass lawn clippings mixed
at a ratio of 8% grass to 92% water by volume.  (Now you know what to do with
the gray water you've collected in your
rain barrels.)  Expect about 830 cubic feet of purified methane from each cubic
foot of ensilaged grass feedstock.  At
local prices that is only US $.40 worth of gas a month per cubic foot of
feedstock (but there are over 6 cubic feet of
space in a 55 gallon drum!)

Other feedstocks have been tried.  You may have heard of animal waste as a
feedstock.  Thankfully, animal waste is only
17% as efficient as ensilaged grass in gas production.
Even so, 'animal waste' digesters have been known to produce gas for up to three
months before they need to be recharged.

The king of feedstocks are the "residual fats", like used cooking oil. These
fats produce three times as much gas as
ensilaged grass on a volume basis so count yourself lucky if you have a ready
supply.

Compare feedstocks at:
http://www.michigan.gov/documents/mda/AD_WhyMixFeedstocks_221951_7.pdf

Keep the contents of the digester warm.  Digesters perform best between 95 and
130 F. Your 'solar hot water'
fabrication skills will be useful here.

Within a few days, biogas will bubble up to the surface.

Provide a method for stirring the contents of your digester without needing to
open it.  Digesters in production for a
long time will produce a solidified 'plug' of feedstock on the top.  You can
continue production by breaking up this
plug occasionally.

After scrubbing the carbon dioxide and pH adjustment,
the residual hydrogen sulfide can be filtered out in a bed of zinc oxide where
it will be adsorbed and converted to zinc
sulfide. The resulting methane gas can be burned in any appliance capable of
using natural gas as it has nearly the same
energy content as natural gas.

:)

So 'producer gas' and methane; two parallel power sources for you!

--Winston

Posted by andrew on June 19, 2011, 6:07 pm
 Winston wrote:


Wouldn't these be better used directly in a diesel genset?
<snip stuff on bidigesters which I agree with and would add the grass works
just as well, if not better, if ensiled>.



CO2 will gradually diffuse through a water bath to increase CH4 content.



I thought old iron swarf was the easiest method, self regenrating too. If
controls are sophisticated it is possible to eliminate H2S in the output
gas.



Producer gas has been doable for a long time but there are still a lot of
buts...

Allpowerlabs are into a 50hour run of their 10kW power pallet this weekend.

http://www.gekgasifier.com/webcam/

you may have to suffer a few adverts.

AJH

Posted by Winston on June 19, 2011, 8:35 pm
 andrew wrote:

The oils, possibly. The greases, probably not.
I don't know anything about direct use of unprocessed residual oil
in diesel motors, though processed 'biodiesel' is finished science
for all intents and purposes.


It works just as well, yes.
You get 3 X *more* biogas from an equal quantity of residual fats than
from ensilaged grass:
http://www.michigan.gov/documents/mda/AD_WhyMixFeedstocks_221951_7.pdf

And after you scrub the CO2 from the resulting CH4, available energy
almost doubles.

I hadn't heard that.  Cite please?  How does the swarf self-regenerate?


But what?  :)


Watching it now.  Thanks!

--Winston

This Thread
Bookmark this thread:
 
 
 
 
 
 
  •  
  • Subject
  • Author
  • Date
please rate this thread