[Discuss] Power consumption
Tom Metro
tmetro-blu at vl.com
Sun Aug 7 14:37:13 EDT 2011
Scott Ehrlich wrote:
> The [stb from Verizon], surprisingly, whether Powered "on"
> or "off" maintained 15 watts continuous.
Were you inspired by one of the articles on this that made the rounds a
few months ago?
Our Set-Top Boxes Suck Up $3 Billion In Energy Every Year
http://gizmodo.com/5812142/our-dvrs-and-cable-boxes-suck-up-3-billion-in-energy-every-year
...the 160 million set-top boxes installed in 80% of American homes
consume more than $3 billion in annual power costs. Mostly from after
we turn them off.
[Natural Resources Defense Council study said,] "In 2010, set-top
boxes in the United States consumed approximately 27 billion
kilowatt-hours of electricity, which is equivalent to the annual
output of nine average (500 MW) coal-fired power plants."
..consider that a recent model HD-DVR consumes more power than an
Energy Star-certified 42" LCD screen and consumes more than half the
power of your new household refrigerator.
Jack Coats wrote:
> My guess is that the strip really contains a GFI. They normally consume
> 1 to 3 watts.
Leakage through the line filter[1] used to suppress transient voltages
is more probable than a GFI on a common power strip. (Most mid-range
power strips contain some sort of filtering. Rarely do they have a GFI.)
The filtering circuit contains components like capacitors that are
placed across the line.
1. http://www.cor.com/Series/PEM/C/ (see Electrical Schematics)
-Tom
--
Tom Metro
Venture Logic, Newton, MA, USA
"Enterprise solutions through open source."
Professional Profile: http://tmetro.venturelogic.com/
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