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Re: [OT] Help with power usage calculation
- Subject: Re: [OT] Help with power usage calculation
- From: Jim Noble <yahoo-groups@xxxxxxxxxxxxxxxxxx>
- Date: Thu, 17 Mar 2005 10:48:19 +0000
- References:
<gwh.423948a3.173e9.d@ev-mail-2.gradwell.net>
David Irwin wrote:
>
> > I suspect your bill is in kWh. Multiply the power consumption
> > of your appliances by time to get the same units (ie 150W for
> > an hour is 0.15kWh).
> >
> Just as a little more clarification 1kW/h means:
> 1 kilo Watt /hour
> 1 Thousand (Units of Power) per hour
1kW/h is a useless metric.
1 Watt == 1 joule per second.
1 kW == 1000 joules per second.
1 kW/h == 1000 joules per second per hour ... huh? (1 over time squared
is an acceleration, not a speed or rate).
If something consumes 1kW/h, don't leave it plugged in for very long... ;-)
> So for a 150W device used for 1 hour it will consume 150W/h or
0.15kW/h
150W for 1 hour is 150Wh or 0.15kWh...
A small point, but might as well get it correct...
Jim
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