search  current discussion  categories  kilns & firing - misc

## cost of firing?

### John Rodgers on sat 17 apr 10

I don't know about others - but Paragon uses an Orton computer to run
their newer kilns and they are set up so that you can plug in the cost
of kilowatts and the computer will automatically calculate the cost of
any given firing - whether bisque or high fire - cone 10 for 18 hours or
cone 020 for a few hours - and print that cost onto the computer screen
in dollars and cents. That is a big help when you are trying to get
control of costs.

John Rodgers

Clayartist and Moldmaker
88'GL VW Bus Driver
Chelsea, AL
Http://www.moldhaus.com

On 4/17/2010 5:21 PM, Monica Wright wrote:
> Do kiln most manufacturers have informaton that tells the cost of firing =
their kilns? Trying to find the cost per firing of my current school kiln =
vs. that of the larger, yet better insulated kiln that I want to purchase. =
I am assuming that it is probably close to being the same cost if not a li=
ttle cheaper with the proposed kiln. So many variables to take into accoun=
t -temp, rate of temp increase, condition of elements, how full the load is=
, etc...
>
> Oh... and my school's PTO decided to purchase the ware cart and slab roll=
er I asked for. Kiln... maybe.
>
>
>

### Monica Wright on sat 17 apr 10

Do kiln most manufacturers have informaton that tells the cost of firing th=
=3D
eir kilns?=3DA0 Trying to find the cost per firing of my current school kil=
n =3D
vs. that of the larger, yet better insulated kiln that I want to purchase.=
=3D
=3DA0 I am assuming that it is probably close to being the same cost if not=
a=3D
little cheaper with the proposed kiln.=3DA0 So many variables to take into=
a=3D
ccount -temp, rate of temp increase, condition of elements, how full the lo=
=3D
ad is, etc...=3D0A=3D0AOh... and my school's PTO decided to purchase the wa=
re c=3D
art and slab roller I asked for.=3DA0 Kiln... maybe.

### David on sun 18 apr 10

The info you need is:
(A) number of watts your kiln draws (on a little sticker on the kiln)
(B) number of hours that it takes to fire it.
(C) what your local electric company charges per kilowatt hours.

So, a simple calculation would be:

(A)*(B) =3D kilowatt hours your kiln uses at 100% power.
Then multiply those kwh by (C), the rate your electric company charges
per kilowatt hour to give you the cost of firing the kiln when it is
achieving
the maximum wattage.

However, it's a little more complicated than that simple calculation
because
you don't know precisely how many hours your kiln it reaching it's
maximum
rated watts. The electric kiln cycles on and off during a firing so
its not
constantly achieving the maximum wattage. In addition, my electric
company
charges a tiered rate ... first 500 kwh is one rate, second 500 kwh is
a little
lower and any after that is a bit lower so that adds another
complication to
getting an exact calculation.

I read somewhere that a conservative estimate for a typical electric
kiln is
that it is on and drawing its wattage rate approximately 50% of the time
during a normal firing so you may multiply the kiln's watt rating by
0.5 for
a more conservative approximation.

Hope that helps a little.
David

David Berg
dberg2@att.net
david@bergstoneware.com
http://bergstoneware.com/

On Apr 17, 2010, at 6:21 PM, Monica Wright wrote:

> Do kiln most manufacturers have informaton that tells the cost of
> firing their kilns? Trying to find the cost per firing of my
> current school kiln vs. that of the larger, yet better insulated
> kiln that I want to purchase. I am assuming that it is probably
> close to being the same cost if not a little cheaper with the
> proposed kiln. So many variables to take into account -temp, rate
> of temp increase, condition of elements, how full the load is, etc...
>
> Oh... and my school's PTO decided to purchase the ware cart and slab
> roller I asked for. Kiln... maybe.

### Deborah Maxwell on sun 18 apr 10

In the Pottery Making Illustrated Sept/Oct 2009 issue gives the formula for=
=3D
figuring out cost per firing.

=3D20
=3D20
=3D20
Deborah J. Bassett-Maxwell

Red Mudd Studio=3D2C LLC
Kimball=3D2C MI 48074
810.367.7001
maxwelldeborah(at)hotmail(dot)com
www.redmuddstudio.com

=3D20

=3D20
> Date: Sat=3D2C 17 Apr 2010 15:21:02 -0700
> From: wright271@SBCGLOBAL.NET
> Subject: cost of firing?
> To: Clayart@LSV.CERAMICS.ORG
>=3D20
> Do kiln most manufacturers have informaton that tells the cost of firing =
=3D
their kilns? Trying to find the cost per firing of my current school kiln =
=3D
vs. that of the larger=3D2C yet better insulated kiln that I want to purcha=
se=3D
. I am assuming that it is probably close to being the same cost if not a =
=3D
little cheaper with the proposed kiln. So many variables to take into acco=
=3D
unt -temp=3D2C rate of temp increase=3D2C condition of elements=3D2C how fu=
ll the=3D
>=3D20
> Oh... and my school's PTO decided to purchase the ware cart and slab roll=
=3D
er I asked for. Kiln... maybe.
=3D20
_________________________________________________________________
Hotmail is redefining busy with tools for the New Busy. Get more from your =
=3D
inbox.
http://www.windowslive.com/campaign/thenewbusy?ocid=3D3DPID28326::T:WLMTAGL=
:O=3D
N:WL:en-US:WM_HMP:042010_2=3D

### May Luk on sun 18 apr 10

Hello John;

In theory, yes, when the kiln works. The Orton controller is
problematic. Ask me how I know.

May

On Sun, Apr 18, 2010 at 12:22 AM, John Rodgers wrote:
> I don't know =3DA0about others - but Paragon uses an Orton computer to ru=
n
> their newer kilns and they are set up so that you can plug in the cost
> of kilowatts and the computer will automatically calculate the cost of
> any given firing - whether bisque or high fire - cone 10 for 18 hours or
> cone 020 for a few hours - and print that cost onto the computer screen
> in dollars and cents. That is a big help when you are trying to get
> control of costs.
>
> John Rodgers
>
> Clayartist and Moldmaker
> 88'GL VW Bus Driver
> Chelsea, AL
> Http://www.moldhaus.com
>
>
> On 4/17/2010 5:21 PM, Monica Wright wrote:
>>
>> Do kiln most manufacturers have informaton that tells the cost of firing
>> their kilns? =3DA0Trying to find the cost per firing of my current schoo=
l =3D
kiln
>> vs. that of the larger, yet better insulated kiln that I want to purchas=
=3D
e.
>> =3DA0I am assuming that it is probably close to being the same cost if n=
ot=3D
a
>> little cheaper with the proposed kiln. =3DA0So many variables to take in=
to
>> account -temp, rate of temp increase, condition of elements, how full th=
=3D
e
>>
>> Oh... and my school's PTO decided to purchase the ware cart and slab
>> roller I asked for. =3DA0Kiln... maybe.
>>
>>
>>
>

--=3D20