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Standby TVs Waste Electricity, How About ACPI?
twitter asks: "There's power management and there's standby, do you know the difference? The BBC is running story on how much electricity is wasted by TV standby mode. Thanks to the very useful EnergyStar program, I'd be the one in seven who thought they were saving electricity, with the standby button. I've been very happy with APM and hibernation on laptops, and want to do something similar with the desktops I use. What's the state of APM / ACPI Wake-on-LAN for Linux these days?" Slashdot touched on this issue, earlier in the week, but that article was more on TVs, not on computer power saving technologies.
Okay... Suppose it costs an extra $10 for the battery, smart circuitry to run it, design costs, etc etc. Suppose disabling the transformer for standby saves you 2W. Suppose it's on standby year-round. That's 8,760 hours, or 17.52 kWh. Say 8 cents per kWh, you're now saving $1.40 per year. It would take over seven years for you to make up the initial cost.
Meanwhile we're filling the landfills and oceans with dinky little transformer-saving batteries.
The standby circuitry in most devices could probably run for days on the charge in a $1.50 capacitor.
I'm an electrical engineer, and no, it can't. That's why there is a transformer. The real solution would be to get off your lazy ass and hit the power switch when you are done watching instead of turning the TV off with the remote. The other solution is to put in a very high-efficiency switching power supply, but those are very expensive.
Contrary to popular belief not everyone in the US owns a gas guzzling SUV... In fact my american car (Chrysler) gets better MPG than the subaru you mentioned.
As for everything else...
I did change my light bulbs, the effect I have to say seems negligable... Either my power company doens't bother to look at my meter to figure out energy use, or my lighting costs are fairly low and therefor the change made to small a difference to notice...
I don't have solar panels used for hot water... My house is already built (& I didn't build it), so the cost to change things now is to much for my fairly average salary to cover... I could try to get a loan to pay for it, but that would nuke any savings I'd see for years... I also doubt anyone would give me a loan... Winter would also cause some issues for this... Heating bills are largest in the winter and solar isn't very effective in general when the solar panels are covered in snow...
As for wind.... That's not a change I can make... Even if I did live in a good area (& I think winter would kill any effective use where I live), I'm not likely to be able to put up a tower... First their is the money issue again... Then I think my city would probably frown on it to... When I looked into wireless internet options I found out my area is heavily restricted on building anything over 30" tall... Less would probably not be so good with the number of trees around here...
Nice ideas, but practicality is questionable...
we are all invisible unless we choose otherwise
I've been trying to get power management to work on PCs for over a decade now, and we're still not there...
S1 (aka. sleep) works on most every system, since it's been around forever, but it'll only save you maybe 2% over the system being normally up and running (doing useful tasks).
S3 (aka. suspend) is the damn-good one. It only uses about 0.5 watts more power than your computer being completely off (I suppose it might be different with a more effecient power supply like a Seasonic). However, it's damn near impossible to get it to work. Windows XP, Linux, FreeBSD. Tried on dozens of completely different machines, and I've never seen it work, once. The drivers for pretty much ALL the hardware need to be written with APCI in-mind.
Hell, if I could just find a list of the motherboards, soundcards, and other components that have drivers on FreeBSD6 that will resume successfully from S3, I'd put together a couple systems with just those componets. Electricity in CA isn't cheap, and I'd be saving lots with instant-on from S3. No more boot-up waits, no more opening-up the same apps every time, etc. Just hit a button, and start working (as soon as the monitor can warm up).
S5 (aka. hibernate) writes out RAM to disk, and reads from disk upon restart. I'm not a particular fan of this method, as it would take quite a while to resume on a system with a large ammount of RAM. Still, it has the potential to be even lower power provided you're going to be away long enough.
So, in my experience, you're still screwed... Just shut-off the machine when you're done.
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