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#Post#: 416--------------------------------------------------
Re: Starting flash "mono-tube" boiler fabrication
By: crazyguy Date: September 17, 2013, 8:34 am
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I think you should see this. AWESOME !
HTML http://www.youtube.com/watch?v=h3prbsBdYi0
#Post#: 419--------------------------------------------------
Re: Starting flash "mono-tube" boiler fabrication
By: burnit0017 Date: September 17, 2013, 9:32 am
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Hi, I tried a wood gasifier a few years ago. The system has to
be airtight, the fire has to be really really hot. and I had a
few explosions. ::)Send me a email and I will send you copy of
the circuit.
#Post#: 420--------------------------------------------------
Re: Starting flash "mono-tube" boiler fabrication
By: burnit0017 Date: September 17, 2013, 4:08 pm
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Hi, results from today's hour test. Remove the steam drum and
did a hydrostatic system test, max psi for the is about 80 psi,
no leaks. I was not able to increase the pressure above 80 psi.
I ran the fire for about a hour and within 10 minutes reached
above 60 psi. I have to solve a timing problem on the cam. The
engine runs for two revolutions and stops, I am not able to
manually push it past that point when under pressure. Without
running the engine I opened the bypass valve and manually
pumped the water feed and was able to maintain about 40 psi as
long as I was pumping. I am starting understand what is needed
for a longer run time. I had fun and I am making progress.
#Post#: 421--------------------------------------------------
Re: Starting flash "mono-tube" boiler fabrication
By: burnit0017 Date: September 17, 2013, 6:15 pm
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Hi, I used JB weld epoxy to fabricate the additional lowbs on
the cam of the 4 stroke. It did not last long, I was able to
scrape it off with my finger nail. It is ok say "I told you so"
;D It just can't take the heat. I have to refabricate the
additional lowbs. It was a good learning experience.
#Post#: 422--------------------------------------------------
Re: Starting flash "mono-tube" boiler fabrication
By: burnit0017 Date: September 18, 2013, 4:06 pm
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HTML http://www.youtube.com/watch?v=jKIt95UrBSM&feature=youtu.be
Hi, I completed the cam modification. The engine is up and
running again. The overpressure valve trigger at 110 psi. The
pressure dropped to 60 psi and the valve closed. I ran the
boiler for a hour and operated the engine as much as possible.
Starting work on boiler control system.
#Post#: 423--------------------------------------------------
Re: Starting flash "mono-tube" boiler fabrication
By: crazyguy Date: September 18, 2013, 6:37 pm
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Nice brazing, but I had a frozen hose last night. (Michigan's
Thumb area). Those gasifier video's are impressive. I'm thinking
of going solar. Parabolic heat concentrating , solar tracking,
high temperature oil collectors. No mppt needed. ;D
#Post#: 426--------------------------------------------------
Re: Starting flash "mono-tube" boiler fabrication
By: lynx wind Date: September 18, 2013, 8:08 pm
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Nice work. You may find that the inlet lobes need to be quite
small and with a narrow dwell. You really only want the inlet
open about 35-25% of the stroke. On mine that was just a small
nub about 1/8" high and shaped like a triangle. The exhaust can
be open longer and close about 90% of the stroke.
It takes a lot of patience to open up the engine case over and
over and shape the inlet lobes. I do this with the cylinder
head off and watch the inlet valve relative to the piston. When
the inlet is closed you should be able to slide a .005-.008"
feeler gauge between lifter and valve stem.
If you do this right, steam consumption will be much lower, and
the engine will run much smoother. This will make it much more
likely that your boiler will keep up with less fuel.
#Post#: 428--------------------------------------------------
Re: Starting flash "mono-tube" boiler fabrication
By: burnit0017 Date: September 18, 2013, 8:45 pm
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Hi, thanks lynx. Right now the engine is steam hog. Even
starting at 60 psi the pressure drops really fast.
I have been keeping the fire small until I understand how the
boiler operates.
Working on water level circuit.
CG, sound great. I hope to see some photo's of your projects.
#Post#: 429--------------------------------------------------
Re: Starting flash "mono-tube" boiler fabrication
By: burnit0017 Date: September 18, 2013, 10:07 pm
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HTML http://img02.picoodle.com/img/img02/4/4/19/f_steam3m_f3c6d64.gif
Interesting engine design, looks like a straight forward
fabrication.
#Post#: 430--------------------------------------------------
Re: Starting flash "mono-tube" boiler fabrication
By: burnit0017 Date: September 19, 2013, 6:21 am
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HTML http://www.energy.kth.se/compedu/webcompedu/ManualCopy/Steam_Boiler_Technology/Steam_water_circulation/steam_water_circulation.pdf
boiler types and operation
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