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Article #125Re: Computers use 7W when SWITCHED OFF!
From: Tony Houghton
Date: Wed, 18 Mar 2009 13:36
Date: Wed, 18 Mar 2009 13:36
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2988 bytes
On Wed, 18 Mar 2009 08:40:22 GMT Stephen Worthington <stephen@jsw12.gen34.nz56.remove_numbers> wrote: > On Tue, 17 Mar 2009 23:43:46 -0000, Conor <conor_turton@hotmail.com> > wrote: > > >Heat rises. The bulb merely heats up the area above it which means > >that doesn't need to be heated by the radiators, thus reducing the > >amount they need to give out. > > > >And a 60W bulb gives out a fair bit of heat. > > It gives out 60 W of heat, less the bit that gets radiated out any > windows. The light output is converted to heat too eventually. So a > 60 W light is generally going to replace 60 W of heater. But more of the heat energy from the lightbulb will be wasted heating the wrong place. Rather than saving the heating from heating up a little bit of air, it will take a bit of air that's already at a comfortable temperature and heat it more. Some of that extra heat will dissipate into the room, true, but because it's at a higher temperature it will also dissipate outside quicker too, especially by conduction through the ceiling if we're talking about a ceiling light. Even if people upstairs are able to benefit from that, they're likely to want a light on too.. Similarly, the warm air from PCs usually gets blown towards a wall. Laptops aren't so bad, mine somehow helps keep my legs warm in Winter even though I've got a "Cushtop" ;). -- TH * http://www.realh.co.uk
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X-Google-Thread: 1063f0,458311f9b43cefc2 X-Google-Thread: 108c83,458311f9b43cefc2 X-Google-Thread: 106e5e,458311f9b43cefc2 X-Google-Attributes: gid1063f0,gid108c83,gid106e5e,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news1.google.com!news4.google.com!news.germany.com!weretis.net!feeder1.news.weretis.net!usenet.ukfsn.org!realh.co.uk!not-for-mail From: Tony Houghton <h@realh.co.uk> Newsgroups: uk.comp.homebuilt,aus.computers,nz.comp Subject: Re: Computers use 7W when SWITCHED OFF! Date: Wed, 18 Mar 2009 13:36:10 +0000 Organization: A well-installed InterNetNews site Lines: 32 Message-ID: <20090318133610.034c43f4@realh.co.uk> References: <c5dbc39e-e6ae-44e2-b87b-9063af737bab@x29g2000prf.googlegroups.com> <49bdec79$1$2602$afc38c87@news.optusnet.com.au> <gpkqgn$k2g$1@lust.ihug.co.nz> <gpl4ab$tmu$3@news.albasani.net> <49be195a$0$16175$db0fefd9@news.zen.co.uk> <726r49Fmvj23U1@mid.individual.net> <01cea21f$0$20670$c3e8da3@news.astraweb.com> <729mngFouc3lU1@mid.individual.net> <01d0156f$0$20621$c3e8da3@news.astraweb.com> <72aqtlFohaaqU4@mid.individual.net> <hlc1s49qeohuqtkarmao3qhp5h8jb77nir@4ax.com> NNTP-Posting-Host: 84.45.223.215 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Trace: localhost.localdomain 1237383855 24796 84.45.223.215 (18 Mar 2009 13:44:15 GMT) X-Complaints-To: usenet@localhost.localdomain NNTP-Posting-Date: Wed, 18 Mar 2009 13:44:15 +0000 (UTC) X-Newsreader: Claws Mail 3.7.1 (GTK+ 2.14.7; x86_64-pc-linux-gnu)