arnt, i guess it is good that i could not understand the sweedish. for me it was only visual. the step by step through the building was highly interesting for me as i do this daily, and had to invent my own system from scratch to do so. seeing how capable gents solved very similar thermal vessel manufacturing problems back in the day, over a different tooling base, is fascinating (in an admitedly very geeky way). that's what i liked. for me the video is a secret document from the past about something of deep daily interest to me.
it was interesting to see, for instance, that this model of imbert was of a tube in tube design. i always thought they were hard welded together cabinets. instead in this video i learned that the hopper and reactor are one "tube", which inserts into the "gas cowling", hung by a flange at the top, where the cap also bolts. they used a triple flange joint at the top, and it could infact come back apart. didn't see what they used for gaskets here though. anyone know? our gek units use this same flange hanging tubes down inside tubes idea, but put the joints in different places. the imbert design continued the rising gas up along the hopper to get some more heat into the fuel, and increase the particulate drop out. it also had a fairly significant air preheating system with the cast tubes wrapped around the hearth. that was the first gas cooling stage. the transfer to the fuel hopper was the next. still, they needed a good deal of cooling on the gas after the reactor and fuel drying/heating. the gas is pulled off one side at the top. what i didn't see a good solution for is how you pull the gas off one side without creating very uneven gas flow and heat transfer up the annulus. i have dealt with this problem all over the gek base unit, pyrocoil and drying bucket. these on the gek are all very are similar heat transfer annuli. in the base, i ended up with wrapped lines. in the pyrocoil and drying bucket, i ended up with baffles in them to get the gas passing back and forth over the center vessel. these solutions have pros and cons, and often still have the uneven pull off the top side problem. the imbert also had a fairly narrow annulus by the top. this often tempts one to put some sort of widening manifold to distirbute the pull. a straight pipe hole is going to have restricted volume to pull against if the annulus space is very shallow. this is why we do widening manifolds like this: http://www.gekgasifier.com/nggallery/page-1309/image/1037 . this one is for the pyrocoil, but we do the same thing all over. the grate again is fascinating. the bump up in the middle of the side to side motion i never knew the imberts used. why is this not in any of the books? the up/down motion in combination with side to side or rotary, we're finding interesting. the huge space between the bottom of the bell and the grate is even more than i've understood from the drawings. this creates known problems. the ton of access ports through the side shows they actually ran these units regularly, and not just as demos. and also that they had lots of problems inside that required frequent digging out and poking. good access to the bell is critical if you are getting bell packing probs regularly. and as this is a known problem of the imbert, they clearly put good bandaids on it allow operators to recover. as for acetylene, i'd never heard of engines being run on it. i'd think it would be impossible given the extreme flame speed of acetylene. it would be way more poppy than a nitro car. while yes, you could also run an engine on small charges of gun powder, it would not be, umm, very smooth. did they really do this back in the day? arnt, do you know of any other old videos like this? j On Sat, Sep 25, 2010 at 5:49 AM, Arnt Karlsen <[email protected]> wrote: > On Sat, 25 Sep 2010 10:45:27 +0100, Ken wrote in message > <[email protected]>: > >> Thanks Arnt >> >> "..the Swedish audio here tells us _nothing_ new we can use, >> it starts with "charcoal gas is dirty and is compressed in >> torpedo like bottles" while "wood gas is good, clean, cheap, >> easy" etc" >> >> That explains the high pressure gas bottles. Charcoal gas would have >> little N2 content, allowing a more practical compression. > > ..which part of "_useless_ propaganda drivel" did you miss? ;oD > > ..just like most of today's media shills, this voiceover > guy has precisely _no_ idea what he's babbling about. > > ..the steel bottles are acetylene bottles. ;o) > You know, high pressure "welding gas." ;o) > >> Charcoal gas, effectively similar to coal gas or "town gas" would be >> made in a central gas works and then compressed for vehicle use. > > .."would", is the operative word here, and it _would_ have to assume > WWII Sweden could afford fighting WWII against both the Soviet Union > and the 3'rd Reich on bottled charcoal gas. ;o) > >> If it were being centrally made, I'm not sure why it would be dirty? >> >> Of course these guys have forgotten more than we will ever know! >> >> Great video all the same. > > ..if you're talking about the 2 minute mid section from the > engineering shop to the bus towing its gasifier trailer, > I agree. ;o) > >> >> >> Ken > > > -- > ..med vennlig hilsen = with Kind Regards from Arnt... ;o) > ...with a number of polar bear hunters in his ancestry... > Scenarios always come in sets of three: > best case, worst case, and just in case. > > _______________________________________________ > Gasification mailing list > [email protected] > http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org > http://gasifiers.bioenergylists.org > http://info.bioenergylists.org > > UNSUBSCRIBE HERE; > http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org > -- ------------------------------------------------------------------------------ Jim Mason Website: http://www.whatiamupto.com Current Projects: - Gasifier Experimenters Kit (the GEK): http://www.gekgasifier.com - Escape from Berkeley alt fuels vehicle race: www.escapefromberkeley.com - ALL Power Labs on Twitter: http://twitter.com/allpowerlabs - Shipyard Announce list: http://lists.spaceship.com/listinfo.cgi/icp-spaceship.com _______________________________________________ Gasification mailing list [email protected] http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org http://gasifiers.bioenergylists.org http://info.bioenergylists.org UNSUBSCRIBE HERE; http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org
