1 Apr
2013
1 Apr
'13
6:32 p.m.
> >> 13,158 iPads?
> > That's less than one and a quarter kilometers! x 241.2mm x 185.7mm
> > How much power would they draw?
> http://gigaom.com/2012/06/21/so-how-much-does-it-cost-to-charge-an-ipad-eve…
> "The analysis shows that each model of the iPad consumes less than 12 kWh
> of elelctricity over the course of a year, based on a full charge every other
> day."
> ...A LOT.
On Mon, 1 Apr 2013, Tony Duell wrote:
Assuming a year is 365 days, thats 8760 hours. And if
12kWh is the total
energy consumed in those 8760 hours, it gives an average power
consumption of about 1.37W. So your 13158 of them would have an average
power consumption of about 18kW. Big, yes, but not ridiculous.
It helps to look at the numbers. 1.37W ??!?
REALLY??!?
But... I would gues that 12kWh figure is for the
'norma' use fo the Ipad,
not usein the processor flat-out all the time. Against that, I guess
some of the power goes to the RF communications stuff and even more to
the display and backpligth, which wouldn't bee needed in this application.
AND that would require that it gets 48 hours of use from each charge!
("full charge every other day") So, it is presumably assuming a
"reasonable" usage of prob'ly no more than 8 hours use per day.
Does anybody know what the actual POWER CONSUMPTION of the device is, not
"what will my electric bill be if I charge it every other day?"
Can it RUN off of a wall-wart? Would that not be a little more efficient
than running down the batteries and then recharging them?
It might even be possible to design a more efficient multi-output power
supply, rather than a few miles of outlet strips with wall-warts.
However, if you were to run it off batteries, and charge them every other
day, it could be PORTABLE! How big a truck?
--
Grumpy Ol' Fred cisin at xenosoft.com