Problem is, of course, there's really no source of pure carbon as a
fuel. Eastern coals have roughly 5% or so H in an ultimate analysis
plus that in the 2-3% moisture; western coals are somewhat higher. H
normally doesn't show up in the analyses as generally one sees the
proximate analysis, not an ultimate so the moisture content is all
that's reported on that basis (but the elemental H is additional to H20
in an ultimate analysis so it's not a double-accounting).
Don't have an ultimate analysis handy, but 100 - 95 is pretty close to 5 :)
Not too many use either for space heating, though, which was the general
subject. Anyway, was just noting there's H pretty much everywhere, even
in nonhydrogenous fuels unless special care made to remove it.
Secondary effect :)
It's probably the most common use for coke, of course...good friend has
been plant engineer for one or more foundries for years. One of his
horror stories is the new furnace dedication of a Japanese owned
facility -- the religious leader picked up a big handful of sea salt and
before John could stop him, having no idea what was coming, tossed it in
the hot vessel! Needless to say, the Cl and other nasties caused so
much contamination in what was to be a very specialized high-purity
stainless forge they had to completely gut the lining and redo it -- at
the cost of something like $10M.
Usually overkill for the purpose. Charcoal on the other hand has at
various times and in various places been plentiful--it's a byproduct
of pine-tar extraction for example, which led to it being something of
a glut on the market in Scandinavia at one time. After a while they
ran out of pine trees though . . .
The price I paid for the infrared propane heater was $49.
Thanks for all for the good advice and for alerting me to the moisture
problem. I think I'll start by leaving the double doors open for an
hour or two after closing down work.
I haven't taken a close look at it yet, but the easiest way to
insulate for me will be to use the firm pink foam stuff with the shiny
silver backing from Home Depot.
On Fri, 21 Nov 2008 18:03:11 -0800 (PST), KIMOSABE
Heated an 8 x 16 shed w/ no insulation through an extremely cold
upstate NY winter a while back with one of those single burner round
ones. One thing that really helped was a small fan behind and above
the heater to help circulate the warm air it produces. Kept the kids
toasty after school while I rebuilt a house from the ground up.
Although water vapor is a byproduct of almost all combustion, I never
noticed a problem with it. Good luck bud
For a rough estimate of how much heater you need you might want to run
the calculator at
http://www.heater-store.com/heater_calculator_info.htm . Note that
with good insulation you need a _lot_ less heat.
Evan a little bit of insulation makes a big difference ;-)
I had an outside shop (electronics in those days, not woodwoorking)
that was 8x10 with insulated walls and ceiling and very little
leakage. I used a 1250 watt electric heater (with a wall thermostat)
and was comfortable when the outside temperature was 30 degrees (a
little better than the calculator indicates).
I've got about what you do, 12' x 24' metal storage building, with an
overhead door, two windows, a hand door, and lots of leaks.
And I live in Minnesota, where it does get cold.
I haven't found a way to insulate the shed without building a wall
inside the existing walls, which looks like more $$ and time than I
want to put in.
So, on the advice from a friend I bought 4 infra red heat lamps (think
chicken brooder heating) with porcelain sockets. I put two at the
bench and two at the lathe, and I use a small radiant propane heater
(about 14000 butu) on top of a 20# propane cylinder (called a fish
house heater, before fish houses got to be traveling living rooms) to
put heat where I need it.
And I invested in a pair of flannel lined jeans ($50) and insulated
shoes from LL Bean ($70) and a stocking cap. Add a chore jacket, a
sweatshirt and gloves, and I can be reasonably comfortable working out
there in 25 degree weather (ambient is about 40 inside) if the sun is
shining, and 30 degree weather if not. Oh, I found some of those
interlocking rubber mats for kids to play on and put them on the floor
where I usually stand ($20). Obviously I am happier working with
tools with wooden handles when it's cold.
Any gluing or finishing or working with water ends up being done in
my attached garage which stays at about 50 degrees.
Shirt sleeves? No, but for a minimum of effort and fuss I have a
reasonable heating system so that I only have to concede 2 months a
year to winter. Fair compromise.
I thought about a wood stove, but it bothered me to have something
that hot in the way, and to bank up the fire and leave it unattended
at the end of the day.
Just a thought... Have you looked in to a spray foam insulation? It has to
be applied professionally, and will take a little space, but it's better
than building 2x4 stud walls so you can install bat insulation.
If you're quiet, your teeth never touch your ankles.
To email me directly, send a message to puckdropper (at) fastmail.fm
Have you seen the silver backed rolls of insulation that are always
against metal roofs in big corrugated steel buildings?
I can't remember where, but I saw that stuff being installed once with
built in adhesive. They pealed off a backing and stuck it up, straight
on the roofing. The adhesive was super-duty, like that rubber
self-sealing window flashing. It would stick to anything and everything,
and would not come loose.
"Playing is not something I do at night, it's my function in life"
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