lpskeen on thu 16 jul 98
I have a Paragon electric kiln. On low, it draws 22.9 amps. On medium
it draws 43.8 amps. On high it draws 44.4 amps. Does anyone know how
to convert this to kilowatt hours so I can figure out how much my
firings cost? Here is my firing schedule:
Low = 2 hours
Medium = 2 hours
High = 6 hours
--
Lisa Skeen ICQ# 15554910
Living Tree Pottery & Soaps
http://www.uncg.edu/~lpskeen
"We will have to repent in this generation not merely for the hateful
words and actions of the bad people, but for the appalling silence of
the good people." -- Dr. M. L. King, Jr. 4/16/63
lpskeen on fri 17 jul 98
Thanks for all the math out there! I have figured out that it costs
about $6.33 to fire to ^6, which explains our power bill last month.
--
Lisa Skeen ICQ# 15554910
Living Tree Pottery & Soaps
http://www.uncg.edu/~lpskeen
"We will have to repent in this generation not merely for the hateful
words and actions of the bad people, but for the appalling silence of
the good people." -- Dr. M. L. King, Jr. 4/16/63
Fred Paget on fri 17 jul 98
Lisa:
The calculation is straightforward but you need to know the voltage.
Assuming that you have 240 volts and also assuming a unity power factor for
a resistive load it goes like this :
(VOLTS X AMPS)/1000 X TIMEfor each segment and then add up the segments for
a total of 96 kilowatt hours
2[(22.9 x 240)/1000] + 2[(43.8 x 240)/1000] + 6[(44.4 x 240)/1000] =95.952 KWH
Fred Paget
>Date: Thu, 16 Jul 1998 12:31:48 EDT
>From: lpskeen
>Subject: amps to KWH?
>
>----------------------------Original message----------------------------
>I have a Paragon electric kiln. On low, it draws 22.9 amps. On medium
>it draws 43.8 amps. On high it draws 44.4 amps. Does anyone know how
>to convert this to kilowatt hours so I can figure out how much my
>firings cost? Here is my firing schedule:
>
>Low = 2 hours
>Medium = 2 hours
>High = 6 hours
>--
>Lisa Skeen
From Fred Paget, in marvelous Marin County, California, USA
on sat 18 jul 98
Don't people have electric meters anymore? I just write down meter reading
before I fire, and write down the reading when I shut down. Subtract the
smaller from the larger and multiply by the cost per KWhr ($0.0625) You can
find out the cost per KWhr by looking at your bill. Of course this is for my
entire house but I can figure and average per hour cost for electricity using
my bill and figuring the day in 3 segments, work segment, evening segment, and
sleep segment. Or figure an average day, then compare that to a firing day.
Deduct the household electricity cost and you have firing costs. Check your
meter. It tells the story and that's how the electric company will be billing
you.
lpskeen on sat 18 jul 98
I have gotten so many private emails with requests for translation and
explanation that I am going to post the information here so everybody
has a chance at it!
Ok, the question is: How do I convert amps to Kilowatt hours so I can
figure out how much it costs to fire my kiln?
First, you have to know what your firing schedule is. Mine is 2 hours
on low, 2 hours on medium, and 6 hours on high to get ^6.
Second, you have to figure out how many amps your kiln draws during the
firing cycle. I got my next door neighbor the electrician to come over
and attach some kind of gadget to the kiln wire in the fuse box. Then,
he took a reading as I turned the kiln on low, medium, and high.
On low, my kiln draws 22.9 amps. Medium draws 43.8 amps, and high draws
44.4 amps.
Next, you have to know how many volts your kiln has. Mine has 240.
The formula to figure out the conversion is as follows. (for x read
"times", and for / read "divided by"):
amps x voltage = watts
watts / 1000 = kilowatts
kilowatts x however long you run on each setting = kilowatt hours
KWH x whatever your power company charges = cost of firing.
For my kiln, it works out thusly, if the kiln operates at 240v on each
setting:
Low: 22.9 x 240 = 5496 watts
5038 / 1000 = 5.496 kw
5.038 x 2 hours = 10.992 kwh
Medium: 43.8 x 240 = 10512
10510 / 1000 = 10.512
10.512 x 2hrs = 21.024
High: 44.4 x 240 = 10656
10656 / 1000 = 10.656
10.656 x 6hrs = 63.936
Add your total kilowatt hours and multiply by however much they charge
you for energy. Duke Power charges me $.066/kwh.
10.992 + 21.024 + 63.936 = 95.952 x $.066 = $6.33
It costs me $6.33 to fire to ^6.
A note: A couple of people have told me that Paragon kilns have 120
volts on low and medium, and only have 240v when it's on high. If so, I
haven't taken that into consideration for this calculation.
--
Lisa Skeen ICQ# 15554910
Living Tree Pottery & Soaps
http://www.uncg.edu/~lpskeen
"We will have to repent in this generation not merely for the hateful
words and actions of the bad people, but for the appalling silence of
the good people." -- Dr. M. L. King, Jr. 4/16/63
on sun 19 jul 98
Hello all...
another way to figure out how much it is costing you .....!
is to take a reading from you meter when you start to fire, then take a
reading when you are done firing.... you can figure the amount of money you
spent for your whole house during the time you fired... if you know what you
average during normal eletrical usage... then you can subtract that....every
time i have done it for my cone 6 firings... it has been around 4 to 6
dollars.. a firing.... for the whole house in the summer... price per kW ...
and .... your own normal usage may be different...
most people don't have an amp meter... and the amp draw changes.... during the
firing even when the kiln is set at the same setting.....
your energy company can tell you what the meter readings mean.....
hope this helps.....
hank... one hot summer....... in oklahoma......
peace
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