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RE: [OT] Help with power usage calculation
- Subject: RE: [OT] Help with power usage calculation
- From: "David Irwin" <david@xxxxxxxxxxxxxxxx>
- Date: Thu, 17 Mar 2005 21:39:54 -0000
>
> 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
>
Jim, Absolutely. My stupidity! Sorry
Dave
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