11 Mar
2010
11 Mar
'10
5:53 p.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of Brian Lanning
Sent: Thursday, March 11, 2010 8:33 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: calculating electricity costs
Suppose my power company claims that the charge is $0.02407 per
killowatt/hour. If I have a computer (or anything) that draws maybe
100
watts. that should be 0.1kw/h x 0.02407 x 24 hours = 5.7768 cents per
day
or $1.73 a month. I've been under the impression for quite some time
that
it costs $20 a month to run a typical modern desktop computer 24 hours
a day
for a month. I know there are taxes and fees thrown into the power
bill.
But what's wrong with my math? Was I wrong before or am I wrong now?
I got
this kw/h price from the power company web site burried in a pdf
somewhere.
It looked like the right price to me. Maybe the actual charge is much
higher?
brian
Here in Seattle, they charge progressively: 4.39 cents per kWh for the first 10 (summer
rate) or 16 (winter rate) kWh per day, then 9.14 cents per kWh for everything past that.
You're right, that sure seems to add up quickly. I have one of those inline meters
that not only tells me the rate of consumption but also allows me to accumulate it over a
period of time for periodic consumption (like a refrigerator, that cycles on and off).
It's been helpful in terms of making decisions regarding 'optional' equipment
- like the dual-proc Alpha machine that draws 250 watts.... -- Ian