[Gasification] ..OT: Watch your snow load!

[Arnt Karlsen]

On Sat, 23 Dec 2006 06:39:39 -0600, Greg wrote in message 
<GGEBLFNJNOGGJGNEDBJJOEMELOAA.a31ford at inetlink.ca>:

> Greetings Doug, Arnt, and List members! (Did I say seasons in a
> previous post ? If not, Seasons, also.)
> 
> As I have just found out, "Doc" from the movie "Back to the future"
> Does exist, but in a future time LOL.
> 
> Doug, you have earned the status of building "Mr. Fusion" even if it's
> cold fusion at that (compared to nuclear). :)
> 
> Snow Load, we have some here (about 25cm or so, but this is sub-normal
> for us, 1m is common this time of year).

..25cm of wet snow can _easily_ be heavier than 1meter of dry snow.

> Gasifier FYI,
>    I have tried something some what unusual with throat section,
>    instead of
> the throat extending down through the lower plate in a gasifier, I
> moved the throat completely above that lower plate, and then lowered
> the entire thing, (of course needing to add much more charcoal to the
> gasifier, to compensate for the extra volume of area around, and below
> the top of the throat).

..that "extra compensation" should eat away some of your gas in
"gasification reversal" in that extra charcoal bed, as your gas 
temperature drops below 800 centigrades.  

..what happens, is the carbon bed "trying to stay hot" by combining 
with the "too cold" CO gas into CO2 and heat.  

..but your experiment will also give us a baseline to compare against
when you replace your charcoal bed with a concrete or leca or somesuch
pellet bed, or simply a grate cage on a jack screw.  

> Hearth, throats top-lip, and tuyere line are still all in the same
> relative relationship to each other, it's just that the lower portion
> of the throat is now also insulated, instead of hanging in "free
> space" in the bottom of the gasifier...

..I use kaowool and ash, and leca pellets , not charcoal.
http://en.wikipedia.org/wiki/LECA

> I have not fired it as yet, it's simply to close to Christmas, and we
> will have a house full this year !
> 
> BTW Doug, MB Hydro.... I have an engagement with them January 16, in
> regards to display of the stationary unit, running the inline 6
> engine.
> 
> Greg Manning,
> Brandon, Manitoba, Canada
> 
> 
> -----Original Message-----
> From: gasification-bounces at listserv.repp.org
> [mailto:gasification-bounces at listserv.repp.org]On Behalf Of
> doug.williams Sent: Saturday, December 23, 2006 12:33 AM
> To: Arnt Karlsen; Gasification at listserv.repp.org
> Subject: Re: [Gasification] ..OT: Watch your snow load!
> 
> 
> Hi Arnt and Colleagues,
> 
> For the moment, we only have sunlight or rain on our roof, so not sure
> how to measure that for loading. 

..easy,  ;o)   just bring out your bath room scale 'n weigh whatever
you have on your roof.  ;o)

> Although serious for those it affects, 

..aye, was primarily meant for those folks who see snow on their 
roof for the first time "ever", chances are pretty good their roofing
etc isn't made nor designed to carry such loads.

> we managed to survive another year of non-gasification. I put
> it down to the inner glow of Christmas good cheer, and I have begun
> serious preparation for surviving the next few days of over eating and
> possibly imbibing to excess. I will probably die of chocolate
> poisoning.
> 
> By a fluke of date line, I live in the future, compared to most of our
> forum members, and I'd like to reveal it's a great place and not scary
> at all. The power is still on, and I can still drive my car on
> available gasoline, so please strive to get to tomorrow, you will
> survive.
> 
> We all need a break, and Christmas is a good time to share some time
> with family and  friends, many of mine scattered across the World.
> 
>  I wish you all a enjoyable Festive Season, from us down here in New
> Zealand.
> 
> Doug Williams.
> 
> 
> ----- Original Message -----
> From: "Arnt Karlsen" <arnt at c2i.net>
> To: <Gasification at listserv.repp.org>
> Sent: Saturday, December 23, 2006 9:03 AM
> Subject: [Gasification] ..OT: Watch your snow load!
> 
> 
> > Hi,
> >
> > ..I see reports on people stuck in snow in places like New
> > Mexico.
> > One thing is getting stuck in snow on the road, there
> > you "just" need watch out for tail pipe gases killing you,
> > you either wanna stop in some wind blown place, where the
> > snow and tail pipe gases are blown away, or combine the
> > snow and your car into an "igloo."
> > And you don't want your "igloo" chewed up by some snow
> > thrower.
> > And you will need fresh air in your "igloo", or, the snow
> > thrower won't matter. ;o)
> >
> > ..need water? Melt some snow.
> >
> > ..in some house, motel, or airport terminal etc building?
> > Make sure the people owning or running etc the joint,
> > understands the snow loads on the roof. Collapse risk.
> >
> > ..dry fresh snow is lightweight, and only of concern if
> > the roof has not been designed to carry it. Weigh it.
> >
> > ..wet snow can easily approach a ton per cubic meter,
> > that's one meter deep snow on one square meter or
> > "one meter each way", or 35 cubic feet, as in "over
> > 3 feet deep on 11 square feet."
> >
> > ..2 meters or 6 feet? If you're in a nuclear blast
> > shelter, "no big deal," for any other kinda structure, you
> > wanna check or remove the snow, or even evacuate people.
> >
> > ..snow load checks are easy, use a yard stick or somesuch
> > and probe the depth, either "on the lawn" or on the roof,
> > then put some snow in a box and weigh it, say on a bath
> > room scale.
> >
> > ..divide that weight by the box volume, and you have the
> > snow density, should be in the 0.15 to 1 metric tonne per
> > cubic meter range or 9 thru 63lb per cubic feet. Multiply
> > that by your roof size and your probed snow depth, and you
> > have your snow load.
> >
> > ..e.g: 25kg/(44cm*12in*250mm)
> > (25*kilogram)/(44*centimeter*(12*inch)*(250*millimeter))
> > = approx. 745.64543(kg/m^3)
> > <> convert lb/ft^3
> > 745.64543(kg/m^3) = approx. 46.549124(lb/ft^3)
> > <> 46.549124lb/ft^3*12m*8m*40in
> > ((46.549124*pound)/(foot^3))*(12*meter)*(8*meter)*(40*inch)
> > = approx. 160.33619klb
> > <> convert ton
> > 160.33619klb = approx. 72.727273t
> >
> > ..if you anywhere near doubt your roof can take
> > those "extra" 73 tons, evacuate all the people under it,
> > then remove those 73 tons of snow.
> >


-- 
..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.