Baseboard heaters, toasters, electric oven elements and stove-top heating elements. Any time heat is generated by passing electricity through a wire or other conductor that offers enough resistance to heat up.
Although, as Max said, this is efficient conversion of electricity to energy it is not necessarily heat efficient. A light bulb generates a lot of resistive heat but a lot of that is in the light spectrum which is not heat that is so easily absorbed. There are other examples, anyone who has heard the element clicking as it expands or contracts with changing temperature will recognize that some of the energy is dissipated as sound or mechanical alteration. Electric heat can be generated using radio frequency such as shortwave or microwave energy or maybe by friction, turning a wheel against something to make heat.Of course there is the electric arc as used in a welder for example which also generates heat. In the context of heat pumps though there is often an electric heating element to boost the temperature of the air when the compressor and heat exchanger cannot satisfy the demand as for example when it is too cold outside to extract enough heat with the gasses used to satisfy the demand. It should be remembered that the limitation are the result of the gasses used. I don't know but I would guess that compressing something like nitrogen would extract plenty of heat from even Antarctic climate conditions but not without significant other challenges.. Dale Leavens, Cochrane Ontario Canada [EMAIL PROTECTED] Skype DaleLeavens Come and meet Aurora, Nakita and Nanook at our polar bear habitat. ----- Original Message ----- From: [EMAIL PROTECTED] To: [email protected] Sent: Tuesday, August 28, 2007 5:18 PM Subject: Re: [BlindHandyMan] What Do You Want Information ON? what are some forms of electric resistance heating? On Mon, 27 Aug 2007, Max Robinson wrote: > Electric resistance heating is 100 percent efficient. All of the electric > energy is converted into heat. It's the only 100 percent efficient thing we > have. > > Regards. > > Max. K 4 O D S. > > Email: [EMAIL PROTECTED] > > Transistor site http://www.funwithtransistors.net > Vacuum tube site: http://www.funwithtubes.net > Music site: http://www.maxsmusicplace.com > > To subscribe to the fun with tubes group send an email to, > [EMAIL PROTECTED] > > ----- Original Message ----- > From: "Geoff Eden" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Monday, August 27, 2007 9:29 PM > Subject: Re: [BlindHandyMan] What Do You Want Information ON? > > >> It's probably useful to take a broad look at the efficiency of electric >> heat. Considering that running a coal generator is only slightly above >> 30% >> efficiency, hence throwing away 70%. Then considering the line loss >> between >> the generator plant and your home, which is often discussed as around 10%. >> Then to further discuss the inefficiency of electrical resistance heating, >> which, I understand is only about 35%, then the whole picture of >> electrical >> heating fuel waste comes into perspective. >> >> Geoff >> ----- Original Message ----- >> From: "Scott Howell" <[EMAIL PROTECTED]> >> To: <[email protected]> >> Sent: Monday, August 27, 2007 6:16 PM >> Subject: Re: [BlindHandyMan] What Do You Want Information ON? >> >> >> So, lets add anothr question to this. Does it make sense to lower the >> temp at night in the home or leave it set at the same temp day and >> night? The thought is by lowering it 3 to 4 degrees at night while >> your asleep, it would run less, but then if the heatpump has to fire >> up the backup heat source which is likely electric itself and run at >> the same time to raise the temp up the 3 to 4 degrees, have you really >> saved anything. >> >> Scott >> [EMAIL PROTECTED] >> >> >> >> On Aug 27, 2007, at 11:21 AM, Dan Rossi wrote: >> >>> Actually, I think that a heat pump is supposed to be more efficient >>> than >>> just straight electric heat, but not exactly sure how it works out >>> that >>> way. >>> >>> -- >>> Blue skies. >>> Dan Rossi >>> Carnegie Mellon University. >>> E-Mail: [EMAIL PROTECTED] >>> Tel: (412) 268-9081 >>> >>> >> >> >> >> To listen to the show archives go to link >> http://acbradio.org/handyman.html >> or >> ftp://ftp.acbradio.org/acbradio-archives/handyman/ >> >> The Pod Cast address for the Blind Handy Man Show is. >> http://www.acbradio.org/news/xml/podcast.php?pgm=saturday >> >> Visit The Blind Handy Man Files Page To Review Contributions From Various >> List Members At The Following address: >> http://www.jaws-users.com/handyman/ >> >> Visit the archives page at the following address >> http://www.mail-archive.com/[email protected]/ >> >> If you would like to join the Blind Computing list, then visit the >> following >> address for more information: >> http://jaws-users.com/mailman/listinfo/blind-computing_jaws-users.com >> >> For a complete list of email commands pertaining to the Blind Handy Man >> list >> just send a blank message to: >> [EMAIL PROTECTED] >> Yahoo! Groups Links >> >> >> >> >> >> To listen to the show archives go to link >> http://acbradio.org/handyman.html >> or >> ftp://ftp.acbradio.org/acbradio-archives/handyman/ >> >> The Pod Cast address for the Blind Handy Man Show is. >> http://www.acbradio.org/news/xml/podcast.php?pgm=saturday >> >> Visit The Blind Handy Man Files Page To Review Contributions From Various >> List Members At The Following address: >> http://www.jaws-users.com/handyman/ >> >> Visit the archives page at the following address >> http://www.mail-archive.com/[email protected]/ >> >> If you would like to join the Blind Computing list, then visit the >> following address for more information: >> http://jaws-users.com/mailman/listinfo/blind-computing_jaws-users.com >> >> For a complete list of email commands pertaining to the Blind Handy Man >> list just send a blank message to: >> [EMAIL PROTECTED] >> Yahoo! Groups Links >> >> >> >> >> >> >> -- >> No virus found in this incoming message. >> Checked by AVG Free Edition. >> Version: 7.5.484 / Virus Database: 269.12.9/975 - Release Date: 8/26/2007 >> 9:34 PM >> >> > > > > To listen to the show archives go to link > http://acbradio.org/handyman.html > or > ftp://ftp.acbradio.org/acbradio-archives/handyman/ > > The Pod Cast address for the Blind Handy Man Show is. > http://www.acbradio.org/news/xml/podcast.php?pgm=saturday > > Visit The Blind Handy Man Files Page To Review Contributions From Various List Members At The Following address: > http://www.jaws-users.com/handyman/ > > Visit the archives page at the following address > http://www.mail-archive.com/[email protected]/ > > If you would like to join the Blind Computing list, then visit the following address for more information: > http://jaws-users.com/mailman/listinfo/blind-computing_jaws-users.com > > For a complete list of email commands pertaining to the Blind Handy Man list just send a blank message to: > [EMAIL PROTECTED] > Yahoo! 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