mel jacobson on tue 7 dec 10
just a few more things to talk about.
most that use propane are used to the small 25lb tanks for
bbq's, raku etc.
they freeze fast when high a volume of gas is used.
they can be pesky with frost build up etc. the tank can be placed
in a plastic tub with warm water. works fine. as the tank freezes
it then slows the flow of fuel.
the larger the tank, the better they work.
ric mentions an 18,000 gallon tank, used in below zero
temps. those commercial potters pre/heat gas, and that
has gone on for years. the burners are made for that action.
i have a pair of burners that the heat goes through a curl of pipe
that carries the gas. so, the gas supply is heated as it comes
to the burner.
nils has a plan for the burner supply pipe to be at the base of the
chimney, and the waste heat actually pre/heats the supply pipe.
(of course this is thick black iron pipe. solid as can be.)
hot gas fires with more btu's than cold gas. works better
on all fronts. cold weather reduces the efficiency of gas. just
a fact. so, industry does what it needs to do to warm gas.
gas can be taken off the tank either as a liquid, or a vapor.
in most cases it comes off the top of the gas supply as vapor.
a long tube is inserted into the tank's lower region to supply as
liquid. again, liquid fires with more btu's. (but, it can also
be a bit more dangerous, as a leak will puddle up like a small lake
and explode.) vapor just leaks to the sky.) (remember, it is all
dangerous and needs careful handling.)
i have a great relationship with my propane supplier. i always
have new truck drivers over when i am firing. they see what we
are doing, how we do it, and really are impressed. they now understand
why we want high pressure, not house pressure. they always look
in the kiln and say the same thing...`holy s#&$ mel, that is really hot.`
i find that engaging the drivers, propane dealers and supply people
with what we do only helps us. no hiding behind the garage stuff.
they want to sell gas in a safe and sane way. the more we educate
them about kilns, the more they understand and help us.
it is all about safety, education and good sense. i show them the new
book, and tell them we are working to make kilns safe and efficient
into the new century.
natural gas is the fuel of the future. it is almost unlimited in supply
and fires as clean as can be when used properly. no smoke, very
little btu waste, and when fired for 100 percent perfect pots it is
a great fuel.
we have a new biomass fuel electric generator near our farm. sawdust, gras=
s,
wood waste, paper products of all kind...ground up and fed to this
big old electric generator that was build for this purpose 70 years ago.
now back online. amazing, things change, but remain the same. my buddy
butch at the sawmill makes a great deal of money selling sawdust.
(butch can say the word `oh` with 56 meanings...you have to meet him
to understand...)
sidebar story:
non/clay. but, SFC Sherri Gallagher of the U.S. Army won the
camp Perry high powered rifle competition with a new U.S. record
score. Yes, Sherri as in Ms. Sherri Gallagher. What a dynamic woman.
She actually won five events. Skill, timing and dedication. Just like
craft. Know your skills, know your materials, and practice like mad.
Women and Men share the world of high end skill and craft. The skill venue
does not matter, mastering it does.
mel
from: minnetonka, mn
website: http://www.visi.com/~melpots/
clayart link: http://www.visi.com/~melpots/clayart.html
new book: http://www.21stcenturykilns.com
alternate: melpots7575@gmail.com
Sandy miller on tue 7 dec 10
fired Sat. in the cold and gotta say, Marc Ward hooked me up with a sweet
two burner system
the fires off three propane cylinders, not one tank. Fires like a dream
and has never frozen up on me.
On Tue, Dec 7, 2010 at 9:51 AM, mel jacobson wrote:
> just a few more things to talk about.
>
> most that use propane are used to the small 25lb tanks for
> bbq's, raku etc.
> they freeze fast when high a volume of gas is used.
> they can be pesky with frost build up etc. the tank can be placed
> in a plastic tub with warm water. works fine. as the tank freezes
> it then slows the flow of fuel.
>
> the larger the tank, the better they work.
> ric mentions an 18,000 gallon tank, used in below zero
> temps. those commercial potters pre/heat gas, and that
> has gone on for years. the burners are made for that action.
> i have a pair of burners that the heat goes through a curl of pipe
> that carries the gas. so, the gas supply is heated as it comes
> to the burner.
>
> nils has a plan for the burner supply pipe to be at the base of the
> chimney, and the waste heat actually pre/heats the supply pipe.
> (of course this is thick black iron pipe. solid as can be.)
>
> hot gas fires with more btu's than cold gas. works better
> on all fronts. cold weather reduces the efficiency of gas. just
> a fact. so, industry does what it needs to do to warm gas.
>
> gas can be taken off the tank either as a liquid, or a vapor.
> in most cases it comes off the top of the gas supply as vapor.
> a long tube is inserted into the tank's lower region to supply as
> liquid. again, liquid fires with more btu's. (but, it can also
> be a bit more dangerous, as a leak will puddle up like a small lake
> and explode.) vapor just leaks to the sky.) (remember, it is all
> dangerous and needs careful handling.)
>
> i have a great relationship with my propane supplier. i always
> have new truck drivers over when i am firing. they see what we
> are doing, how we do it, and really are impressed. they now understand
> why we want high pressure, not house pressure. they always look
> in the kiln and say the same thing...`holy s#&$ mel, that is really hot.`
>
> i find that engaging the drivers, propane dealers and supply people
> with what we do only helps us. no hiding behind the garage stuff.
> they want to sell gas in a safe and sane way. the more we educate
> them about kilns, the more they understand and help us.
> it is all about safety, education and good sense. i show them the new
> book, and tell them we are working to make kilns safe and efficient
> into the new century.
>
> natural gas is the fuel of the future. it is almost unlimited in supply
> and fires as clean as can be when used properly. no smoke, very
> little btu waste, and when fired for 100 percent perfect pots it is
> a great fuel.
>
> we have a new biomass fuel electric generator near our farm. sawdust,
> grass,
> wood waste, paper products of all kind...ground up and fed to this
> big old electric generator that was build for this purpose 70 years ago.
> now back online. amazing, things change, but remain the same. my buddy
> butch at the sawmill makes a great deal of money selling sawdust.
> (butch can say the word `oh` with 56 meanings...you have to meet him
> to understand...)
>
> sidebar story:
>
> non/clay. but, SFC Sherri Gallagher of the U.S. Army won the
> camp Perry high powered rifle competition with a new U.S. record
> score. Yes, Sherri as in Ms. Sherri Gallagher. What a dynamic woman.
> She actually won five events. Skill, timing and dedication. Just like
> craft. Know your skills, know your materials, and practice like mad.
> Women and Men share the world of high end skill and craft. The skill ven=
ue
> does not matter, mastering it does.
> mel
>
>
>
> from: minnetonka, mn
> website: http://www.visi.com/~melpots/
> clayart link: http://www.visi.com/~melpots/clayart.html
> new book: http://www.21stcenturykilns.com
> alternate: melpots7575@gmail.com
>
Lee Love on tue 7 dec 10
On Tue, Dec 7, 2010 at 9:19 AM, Sandy miller wrote:
> fired Sat. in the cold and gotta say, Marc Ward hooked me up with a sweet
> two burner system
> the fires off three propane cylinders, not one tank. =3DA0 Fires like a d=
re=3D
am
> and has never frozen up on me.
My teacher's setup had about 2 dozen tanks. You frequently saw a
stake truck motoring around Mashiko with LPG tanks in the back. You
rarely saw large tanks anywhere. You could also get Butane.
--
=3DA0Lee, a Mashiko potter in Minneapolis
http://mingeisota.blogspot.com/
=3D93Observe the wonders as they occur around you. Don't claim them. Feel
the artistry moving through and be silent.=3D94 --Rumi
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