James Shepard on wed 29 jan 97
I hope someone can reflected some light on the reason a Ransom B-3 burner
only puts out thirty thousand BTUs: It is setting here on my desk and the
catalog from Ransome is open to page one and it says for 7seven inches of
natural gas it is a wimp? What can I do to make this burner go faster? It
looks like a racer, can it be made more efficient? What would a larger
orifice due? Or what happens when the end plate is removed? Or a different
nozzle?
These burners look like the burners under a old Alpine with atmospheric
burners. They are about the same size and shape. What have I missed? If you
would explain this, I would be able to get on to the next mystery. I would
like to use them on a kiln I'm building out of a castable mix, found on the
ceramic web, then gopher.
Any input on this to me, or the group, it may be of interest to others as well.
Thanks
Jim & Suzanne @
TerraShire Studio
4273 N. Thorne Ave
Fresno, Cal. 93704
209 229-8750
Louis Katz on thu 30 jan 97
Burners are rated for a certain number of BTU's at a certain Pressure of
gas and assuming that the burner will entrain (pull in) a certain
percentage of the primary air needed for combustion.
For example( no literature on hand) a burner that is designed to
entrain 70% of the air needed for complete combustion at 7" water
column gas pressure may have a maximum number of BTUS of 70,0000 / hr.
If the orifice is drilled out and the amount of gas is increased then
the percentage of air entrainment will go down.
So, if a manufacterer simple says 70,000 BTU's/ hr without specifing a
percentage air entrainment, they are not telling you the whole story and
the figure just tells you the size orifice the burner is drilled to..
To further complicate matters if the tip of the burner is at a negative
pressure (caused by a chimney) the BTU capacity of the burner will
increase.
Of course if you have a blower none of this applies.
Louis
James Shepard wrote:
>
> ----------------------------Original message----------------------------
> I hope someone can reflected some light on the reason a Ransom B-3 burner
> only puts out thirty thousand BTUs: It is setting here on my desk and the
> catalog from Ransome is open to page one and it says for 7seven inches of
> natural gas it is a wimp? What can I do to make this burner go faster? It
> looks like a racer, can it be made more efficient? What would a larger
> orifice due? Or what happens when the end plate is removed? Or a different
> nozzle?
> These burners look like the burners under a old Alpine with atmospheric
> burners. They are about the same size and shape. What have I missed? If you
> would explain this, I would be able to get on to the next mystery. I would
> like to use them on a kiln I'm building out of a castable mix, found on the
> ceramic web, then gopher.
> Any input on this to me, or the group, it may be of interest to others as well
> Thanks
> Jim & Suzanne @
> TerraShire Studio
> 4273 N. Thorne Ave
> Fresno, Cal. 93704
> 209 229-8750
--
Louis Katz lkatz@falcon.tamucc.edu
Texas A&M University Corpus Christi
6300 Ocean
CCTX 78412
(512) 994-5987
http://www.tamucc.edu/~lkatz
Ellen Baker on thu 30 jan 97
You should tell us what color the flame is when you use the burner. If the
flame is dark red or smokes, the orifice is already too big. The most
efficient flame is blue-white.
There are tables that you can use to figure the ratio of "throat" or
primary ventilation of a natural draft burner per given rate of gas flow
(for the orifice size at a given pressure).
Your local gas company may be very willing to help you figure it out (our
propane supplier has always had a keen interest in keeping its paying
customers ALIVE and in one piece). Another source of information would be
tables in some of the popular kiln books (such as Fred Olsen's book) that
sort of information.
I do love the roar of a good gas flame! Keep us posted?
>
> ----------------------------Original message----------------------------
> I hope someone can reflected some light on the reason a Ransom B-3 burner
> only puts out thirty thousand BTUs: It is setting here on my desk and the
> catalog from Ransome is open to page one and it says for 7seven inches of
> natural gas it is a wimp? What can I do to make this burner go faster? It
> looks like a racer, can it be made more efficient? What would a larger
> orifice due? Or what happens when the end plate is removed? Or a different
> nozzle?
> These burners look like the burners under a old Alpine with atmospheric
> burners. They are about the same size and shape. What have I missed? If
you
> would explain this, I would be able to get on to the next mystery. I
would
> like to use them on a kiln I'm building out of a castable mix, found on
the
> ceramic web, then gopher.
> Any input on this to me, or the group, it may be of interest to others as
> well.
> Thanks
> Jim & Suzanne @
> TerraShire Studio
> 4273 N. Thorne Ave
> Fresno, Cal. 93704
> 209 229-8750
>
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