Green semiconductor advice goes beyond the chip
ISSCC The semiconductor industry is poised to make major contributions to global energy efficiency, according to NXP Semiconductors chief technology officer René Penning de Vries speaking at the International Solid State Circuits Conference (ISSCC).
The need for energy efficiency is twofold, according to Penning de Vries speaking at the San Francisco, California, event. Namely, to reduce carbon dioxide emissions that contribute to global warming, and to reduce the overall need for the energy required to power electronic devices. This will, in turn, reduce the need for power generation and thus also reduce carbon emissions
"For every one per cent saved in the world's electricity consumption," said Penning de Vries, "roughly 40 fewer power stations are required."
Most energy efficiency efforts undertaken by the semiconductor industry up until now have focused on chips themselves. The next steps "require a new climate of innovation," which Penning de Vries defined as "cradle to cradle". That means design, though manufacturing, to use in carefully monitored operation with real-time, component-level, highly optimized power management.
Among the areas of improvements that Penning de Vries discussed were buildings, displays, lighting, and cars.
Buildings: approximately 2.5 billion electricity meters are currently in use worldwide. Unfortunately, most meters are primitive analog devices that must be read manually by a peripatetic meter-reader with a clipboard.
Networkable meters are only now beginning to appear, adding the advantage of centralized monitoring and immediate feedback to their users.
The next step will be smart metering using advanced metering infrastructure (AMI) - which Penning de Vries said in an aside to the assembled semiconductor designers will "require a lot of silicon."
AMI meters will be able to not only monitor and regulate electricity use, but also intelligently load-balance in real time, flattening out peak demand - which, according to Penning de Vries, is actually a rare occurance - only 55 hours per year, for example, in California.
Widespread adoption of AMI metering could result in a 10 per cent reduction in electricity use.
Displays: Penning de Vries referred to the current backlighting systems used in the majority of large-screen displays - think wide-screen LCD TVs - as "stupid." To illustrate the immediacy of the challenge, Penning de Vries claimed that: "As three million homes upgrade to home cinema, we need another - large - power station."
He outlined a number of proposed improvements that would reduce current power requirements by up to 85 per cent, yet still produce the same brightness as is achieved in today's systems.
All of his suggested improvements require monitoring the display's video signal to determine the color and brightness of each pixel, and then modify the power used for illumination on a pixel-by-pixel basis.
Merely using white LEDs as illumination, then dimming the illumination of white pixels could result in a 50 per cent power cut without changing perceived illumination, according to Penning de Vries. Adding RGB sensing and adjusting illumination to match pixel needs could drop that power by another 10 per cent.
Don't buy cheap CFLs
I have had one melt down (burning plastic time) and another go s/c taking out the main house breaker. This from a reputable housewares and furniture company (1). The older more expensive (Phillips again) are still working fine. I don't fancy risking a house fire with cheap ones, and they don't last as long either.
Buy cheap, get cheap.
PS: Why no standard fitting for the tube to the starter/main body of the device? Very green to throw it out if only one part is borked (bork, bork, bork #1).
Yeah got a few kicking about the house now, they do take a little while to warm up but are fine after that and are brighter than the bulbs they replaced, also do remember
60w for the old bulb, 11w for the new one.. Work it out
Cost of bulb + cost to power it over it's a timespan (approx what 3,000hrs)
say 60w bulb at say 50p ..
3,000 x 0.06 Kw = 180 Kwh of power required for this 1 bulb.. what's power these days 9p/Kwh something odd.. -> £16.20 + 0.50 for the bulb - £16.70
Now for the CFL - cost £1.80 say (it's a phillips one) so that's
3,000 x0.011 Kw => 33Kwh of power at 9p/Kwh = £2.97 + £1.80 => £4.77
So even if it only lasts 3,000 hrs dues to lots of spikes / blips / repeated on/off which kills many things quicker, your still saving..
So I'll stop there, yes it's a pain you can't use them in certain fittings but it doesn't say you can't, it just says that it will reduce it's lifespan.
Now if they could get them to work with a dimmer switch I'd be loving it as 5 x 9 w much better that 5 x 40w.
The Bulb Delusion
The first two comments are surprising to me. I have been using CFLs for too many years to remember. Nearly all the first generation (phillips globe) are still working perfectly. They were expensive (£6), slow to get to full power, but had a warm colour.
Which would suggest, your correspondents did not use these or had an electricity supply or use that destroyed them.
Subsequent CfL of the 'rod' variety were very much cheaper - 49p seems to be the norm nowadays. Some are good, some from cheap factories are blue and dodgy. Could this be what your correspondents are judging from? As for size, the normal inexpensive CfL is a little larger. But I have never had a problem getting a compact version of that would fit in the space of the old 60w. Yes, these are more expensive (~£2) but still are much cheaper than 60w when consumption is taken in.
Sorry, these people are either rather thick, or deciding (like that NI minister yesterday) that their agenda is more important than fact.
But then 19% of the UK population believe the earth goes round the sun once a month so I guess alllowances must be made ....
Could someone please explain
how digital meters will have any effect on power use?
I personally own 2 LED light bulbs. I use one as a desk lamp, and I can't think of a use for the other. They are exceedingly dim and annoyingly blue. I suppose I'll use the second to replace the first after its 50,000 hours are up (ten years from now or so)
CFL longlife is an industry myth
For a good long while I have flirted with using CFLs to replace my older style lamps and I have to say that I am pretty underwhelmed regarding the long life claims.
Most of the standard supermarket CFLs I have bought have a far shorter life than their tungsten counterparts.
Symptoms of failure are typically chosen from the following list:
- output "strange" spectrum blue light that makes you feel really ill after a while
- just refuses to come on
Oh, and the other thing is that they are typically slightly bigger than tungsten lamps and are therefore useless for close fitting enclosed bathroom enclosures.
Oh and another thing while I'm at it - they take so long to "warm-up" that they are useless for garages, cupboards and stairs.
Oh and they are more expensive.
Is there any reason why people are NOT flocking to buy them?