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Article #129Re: Computers use 7W when SWITCHED OFF!
From: Tony Houghton
Date: Wed, 18 Mar 2009 17:55
Date: Wed, 18 Mar 2009 17:55
23 lines
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2684 bytes
On Wed, 18 Mar 2009 16:40:52 -0000 Conor <conor_turton@hotmail.com> wrote: > In article <20090318133610.034c43f4@realh.co.uk>, Tony Houghton says... > > > But more of the heat energy from the lightbulb will be wasted heating > > the wrong place. > > Why? As heat rises, the top part of the room above human being level > has to be heated up first and then the temperature gradually warms up > lower down. But you tend to get a temperature gradient, so the air around the lightbulb, which is already hot enough, gets a little bit hotter without having much effect on the cooler air lower down that you really want to heat. We don't live in hermetically sealed rooms with perfect insulation, so heat is always escaping. Putting heat sources on the ceiling or high up on a wall are the best places if you want the heat to escape from the room before it gets a chance to dissipate evenly around it. -- 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!g2news2.google.com!news4.google.com!feeder1-2.proxad.net!proxad.net!feeder1-1.proxad.net!ecngs!feeder2.ecngs.de!87.106.137.111.MISMATCH!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 17:55:48 +0000 Organization: A well-installed InterNetNews site Lines: 24 Message-ID: <20090318175548.66ab588f@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> <20090318133610.034c43f4@realh.co.uk> <72cmgoFp6283U1@mid.individual.net> 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 1237398968 29459 84.45.223.215 (18 Mar 2009 17:56:08 GMT) X-Complaints-To: usenet@localhost.localdomain NNTP-Posting-Date: Wed, 18 Mar 2009 17:56:08 +0000 (UTC) X-Newsreader: Claws Mail 3.7.1 (GTK+ 2.14.7; x86_64-pc-linux-gnu)