How can we save energy while glued to the goggle-box?
As of 2011/09 my partner's 13" Sony Trinitron CRT TV must be about 20 years old; still working but she'd like a new one and I'd like the opportunity to trim some of its power consumption, about 0.5kWh a day typically, or about 70W including the small separate SCART/UHF converter for the DVD player. A good low-power TV would be a greener choice than just going for the first TV with a pretty bezel that we see!
We don't have a huge living room, so 22" or 24" should be plenty large enough, and with an LED-backlit LCD model then power consumption ~50% lower than the CRT seems to be possible, and a well-integrated DVD would reduce clutter and could remove another small parasitic standby draw.
We wouldn't chuck the working TV, just maybe wheel it into the kitchen with the existing DVD player, so we'd have to avoid the Jevons/rebound effect, ie the temptation to watch TV more often negating potential energy savings.
As of 2011/09/15 I had the following list of possibles plucked mainly
from the Argos catalogue (* for integrated DVD player):
|Size||Price £||Argos Cat#||Brand||Model / EAN||Consumption In Use / Standby||Comment|
|22"*||199.99||529/6101||Hitachi||L22DG07 / 4902530910032||40W/1W||EST recommended|
|22"*||159.99||529/6149||Bush||SuperSlim 22 Inch / 5060234040871||???/1W|
|22"||149.99||529/8518||Sharp||LC22LE22E / 4974019664149||20.3W/0.43W||Argos lists power consumption as 24.6W/0.21W|
|22"*||184||-||Sanyo||LCE22FD40DV-B / 4994334288172||45W/0.5W||From Sust-it.net and manufacturer's site, though note that PDF on manufacturer's site says 45W in use and was confirmed by customer service 2011/09/19:
We referred your enquiry to the Product Manager for televisions and he has advised that the power consumption is 45 Watts when the power is on. Our website will be corrected and meanwhile we thank you for drawing the matter to our attention.And in a follow-up 2011/09/23 Sanyo confirmed that it has no 22"--26" LED-backlit LCD TVs available in the UK with or without built-in DVDs with in-use consumption well below 45W.
Note that a new separate DVD such as the Sony DVPSR750 (Argos 936/8530) should cost ~£40--£50 and consume 6W in use, 0.5W standby.
The Sanyo LCE22FD40DV-B, available via Amazon / Southern Electric for £184.37 as of 2011/09/16 looks very tempting.
Still not bought.
A visit to Sony today and Argos a little while ago suggests to me that our 'on' consumption budget should be about 40W max for a TV, which I think is roughly 'B' rated or better, or 50W (ie an extra 10W) for an integrated DVD as 10W is what their simplest stand-alone DVD consumes and a bit more than ours. That should get up to about the 24" or 26" size that my partner would like.
~40W for the TV would save us ~0.1kWh/d or about the energy used by our ADSL modem. We might be able to get to under 30W for an A-rated device.
The chap in the Sony shop says that Sony has stopped doing integrated DVDs because they break before the rest of the TV, so possibly wide words there suggesting to keep them separate.
Our old TV is failing today (contrast is going), so we are ordering from Amazon a LG 26LS3500 26"/66cm LED-backlit 1280x720 LCD TV for £214.49 plus a modest delivery charge. It has a claimed 29W in-use consumption (about half that of the old CRT) which may save ~0.25kWh/day. The 15W taken by the PACE cable box is even more glaring, especially given that the standby on the TV is ~0.3W whereas the cable box only reduces by about 1W!
Note that the size (26") is more than I had thought useful, but Jean had seen a couple this size in other houses, and bigger ones had seemed just too much, and this one is as good as I could hope for on the power front (and I suspect that controls can be tweaked to do better than default).
I remain slightly wary given LG past form on energy ratings but I shall measure rather than just take on trust.
2012/11/13: TV arrived and after an abortive attempt to set up was fine. Comes with an Eco 'Auto' mode by default, and against which I took the following approximate energy consumption values (measured with Maplin N67HH plug) for our new combination of Lime plug to power everything off, TV, PACE cable TV box, and DVD player:
All these readings seem to fluctuate a bit, and the PACE box seems to need to be turned and and explicitly put back into standby after power up to achieve its 1W 'standby' saving.
These measurements were taken before enabling the "Intelligent Sensor" which adjusts the TV brightness depending on room brightness.
Note that the measured ~0.9W TV standby is noticeably higher than the specified "<0.3W" value.
The machine that serves this site is powered by local off-grid solar; draw is ~1W.
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