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Groups > sci.electronics.design > #447609
| From | rickman <gnuarm@gmail.com> |
|---|---|
| Newsgroups | sci.electronics.design |
| Subject | Re: Window Heater |
| Date | 2017-02-13 20:36 -0500 |
| Organization | A noiseless patient Spider |
| Message-ID | <o7tms6$8nh$2@dont-email.me> (permalink) |
| References | <o7oj4r$9vu$1@dont-email.me> <6f9c7707-2170-48b9-9707-040a654ede2a@googlegroups.com> |
On 2/13/2017 4:49 PM, Lasse Langwadt Christensen wrote: > Den søndag den 12. februar 2017 kl. 04.02.37 UTC+1 skrev rickman: >> I sit directly under a window much of the time (don't suggest I move, >> there just isn't another practical option). When it is cold the window >> has a draft that is downright brutal. I plugged the window with a 3/4 >> inch piece of Styrofoam insulation and the draft persists (sealed with >> tape around the edges). Seems even a couple of degrees difference with >> the room air can create a draft that is cold enough to be a bother. The >> wall around the window reads 66 degrees while the Styrofoam reads about >> 64 degrees. >> >> I thought maybe the way to deal with the draft is to fight cold with >> fire. So I bought a few power resistors in the metal cases that can be >> mounted. I wired them in series and connected a variable supply as I >> didn't know how much power I would need. Turns out a fair amount. If I >> crank up the heat to around 30 to 40 watts with the resistors right >> behind me on the sill of the window, the draft is gone. Not bad. >> >> But I was wondering how best to mount them. At this wattage they get >> pretty warm, around 200 degrees! I was looking at sheet aluminum to >> mount them to thinking just a couple/three inches of height would do the >> job. But now I am wondering. I'm not sure a string of resistors along >> a three inch wide sheet of aluminum would reduce the temps that much and >> I'm not at all clear on how that might affect the airflow. >> >> I am thinking of a much wider sheet that would not get so hot. I am >> also thinking it would help better to cut the draft by being larger. >> I'm thinking it would give rise to a reverse draft and possibly require >> less heat. >> >> So which is better, a small hotter heat source or a spread out lower >> heat source. I suppose covering the entire windows with aluminum would >> be the best approach, but I'm not ready to do that. So maybe 12 inches >> of aluminum sheet? >> > > don't forget to look at the datasheet for those resistors, quite a few > of them will be derated to ~0W at ~100'C I think that would be 100°C ambient temperature, not the resistor. They don't want the resistor going above 100°C perhaps, but that doesn't mean you can't put power in to reach that temp. -- Rick C
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Window Heater rickman <gnuarm@gmail.com> - 2017-02-11 22:02 -0500
Re: Window Heater bill.sloman@ieee.org - 2017-02-11 20:57 -0800
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-12 01:02 -0500
Re: Window Heater whit3rd <whit3rd@gmail.com> - 2017-02-11 23:07 -0800
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-12 03:52 -0500
Re: Window Heater whit3rd <whit3rd@gmail.com> - 2017-02-12 18:32 -0800
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-12 21:42 -0500
Re: Window Heater "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-02-13 10:04 -0600
Re: Window Heater makolber@yahoo.com - 2017-02-13 10:17 -0800
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-13 15:30 -0500
Re: Window Heater "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-02-13 15:39 -0600
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-13 20:28 -0500
Re: Window Heater krw@notreal.com - 2017-02-13 20:48 -0500
Re: Window Heater Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-13 13:47 -0800
Re: Window Heater dagmargoodboat@yahoo.com - 2017-02-14 06:56 -0800
Re: Window Heater "dcaster@krl.org" <dcaster@krl.org> - 2017-02-14 07:17 -0800
Re: Window Heater dagmargoodboat@yahoo.com - 2017-02-14 13:20 -0800
Re: Window Heater George Herold <gherold@teachspin.com> - 2017-02-14 16:17 -0800
Re: Window Heater "dcaster@krl.org" <dcaster@krl.org> - 2017-02-14 16:28 -0800
Re: Window Heater George Herold <gherold@teachspin.com> - 2017-02-14 17:42 -0800
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-14 21:18 -0500
Re: Window Heater dagmargoodboat@yahoo.com - 2017-02-14 19:20 -0800
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-14 22:42 -0500
Re: Window Heater George Herold <gherold@teachspin.com> - 2017-02-15 06:51 -0800
Re: Window Heater "dcaster@krl.org" <dcaster@krl.org> - 2017-02-15 06:06 -0800
Re: Window Heater George Herold <gherold@teachspin.com> - 2017-02-15 06:54 -0800
Re: Window Heater "dcaster@krl.org" <dcaster@krl.org> - 2017-02-15 09:15 -0800
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-15 15:02 -0500
Re: Window Heater "dcaster@krl.org" <dcaster@krl.org> - 2017-02-15 16:38 -0800
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-15 19:50 -0500
Re: Window Heater Martin Brown <|||newspam|||@nezumi.demon.co.uk> - 2017-02-17 11:18 +0000
Re: Window Heater Martin Brown <|||newspam|||@nezumi.demon.co.uk> - 2017-02-16 08:28 +0000
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-14 14:07 -0500
Re: Window Heater dagmargoodboat@yahoo.com - 2017-02-14 12:57 -0800
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-14 17:32 -0500
Re: Window Heater dagmargoodboat@yahoo.com - 2017-02-14 19:12 -0800
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-14 14:16 -0500
Re: Window Heater dagmargoodboat@yahoo.com - 2017-02-14 12:53 -0800
Re: Window Heater John S <Sophi.2@invalid.org> - 2017-02-14 16:14 -0600
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-14 17:35 -0500
Re: Window Heater John S <Sophi.2@invalid.org> - 2017-02-15 10:45 -0600
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-15 15:06 -0500
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-15 16:46 -0500
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-14 17:34 -0500
Re: Window Heater bill.sloman@ieee.org - 2017-02-12 04:57 -0800
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-12 18:19 -0500
Re: Window Heater Winfield Hill <hill@rowland.harvard.edu> - 2017-02-12 10:42 -0800
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-12 18:30 -0500
Re: Window Heater Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-02-12 08:45 +0000
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-12 03:57 -0500
Re: Window Heater Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-02-12 09:34 +0000
Re: Window Heater Jon Elson <elson@pico-systems.com> - 2017-02-11 23:52 -0600
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-12 01:07 -0500
Re: Window Heater Martin Brown <|||newspam|||@nezumi.demon.co.uk> - 2017-02-14 10:40 +0000
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-14 06:00 -0500
Re: Window Heater John S <Sophi.2@invalid.org> - 2017-02-14 16:17 -0600
Re: Window Heater Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-14 14:28 -0800
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-14 17:36 -0500
Re: Window Heater Mikko OH2HVJ <mikko.syrjalahti@nospam.fi> - 2017-02-12 14:54 +0200
Re: Window Heater Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-02-12 08:56 -0700
Re: Window Heater Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2017-02-12 20:14 +0200
Re: Window Heater Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-02-11 00:30 -0500
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-12 18:56 -0500
Re: Window Heater "dcaster@krl.org" <dcaster@krl.org> - 2017-02-12 06:35 -0800
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-12 19:01 -0500
Re: Window Heater "dcaster@krl.org" <dcaster@krl.org> - 2017-02-12 17:29 -0800
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-12 21:37 -0500
Re: Window Heater Jon Elson <jmelson@wustl.edu> - 2017-02-13 15:08 -0600
Re: Window Heater Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-13 13:32 -0800
Re: Window Heater Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-12 08:20 -0800
Re: Window Heater "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-02-12 11:48 -0600
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-12 19:03 -0500
Re: Window Heater "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-02-13 09:58 -0600
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-13 15:33 -0500
Re: Window Heater Jon Elson <jmelson@wustl.edu> - 2017-02-13 15:10 -0600
Re: Window Heater Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-13 13:36 -0800
Re: Window Heater "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-02-13 15:40 -0600
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-13 20:34 -0500
Re: Window Heater krw@notreal.com - 2017-02-13 20:52 -0500
Re: Window Heater Tim Wescott <seemywebsite@myfooter.really> - 2017-02-12 12:02 -0600
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-12 19:05 -0500
Re: Window Heater Tim Wescott <seemywebsite@myfooter.really> - 2017-02-14 17:49 -0600
Re: Window Heater bitrex <bitrex@de.lete.earthlink.net> - 2017-02-12 13:06 -0500
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-12 19:05 -0500
Re: Window Heater Clifford Heath <no.spam@please.net> - 2017-02-13 11:21 +1100
Re: Window Heater krw@notreal.com - 2017-02-12 19:28 -0500
Re: Window Heater Martin Riddle <martin_ridd@verizon.net> - 2017-02-12 21:57 -0500
Re: Window Heater "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-02-13 10:01 -0600
Re: Window Heater Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-13 13:49 -0800
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-02-13 20:36 -0500
Re: Window Heater rickman <gnuarm@gmail.com> - 2017-03-01 19:44 -0500
Re: Window Heater George Herold <gherold@teachspin.com> - 2017-03-01 17:33 -0800
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