The really simplest and accurate answer is to simply shut the machinery down
as prescribed for an electrical billing period and compare that bill to a
same length period of not shutting the machinery down.
That's not very complex, whatever the two "simple" statements mean.
That is by far the most accurate way to asses it, including comparing
the numbers to last year's same period to see if usage is remaining
constant for the time of year involved.
The only problem with that is if other conditions vary between billing
cycles (temperature, lighting needs, etc.). Those other conditions can
skew the results and lead to very erroneous conclusions. Since the savings
on this may be very subtle, those confounding conditions may swamp out the
If you're going to be dumb, you better be tough
I can see that but in a factory production setting I doubt that lighting
would be different and there may be no air conditioning but if you take
ajasent billing periods you may not have much deviation at all on
Change the experiment parameters every other day.
That mitigates the seasonal things like HVAC.
Simple enough on our residential meters here
You were the "OPERATION" game voice?
Yes. Take out wrenched ankle.
Punch presses have large fly wheels that require significant amounts of
energy to get them up to speed. Once at speed they require very little power
to keep them running. It's quite common for these presses to be left running
during breaks and lunch as a means of reducing the electrical power that is
required to run them. In fact, the fly wheels of the larger ones are likely
to still be turning after being powered off and left for a half hour period.
Starting one and bringing it up to speed requires much more power than
running it at speed for several hours. Long ago this fact was realized, and
this is why they are left running as a common practice.
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