Article 1048457 of alt.home.repair: Path: news.misty.com!not-for-mail From: nicksanspam@ece.villanova.edu Newsgroups: alt.home.repair Subject: Re: Garage heater kit for fridge? Date: 27 Sep 2008 16:32:03 -0400 Organization: Villanova University Lines: 29 Message-ID: References: <5XoDk.1619$ZP4.1162@nlpi067.nbdc.sbc.com> NNTP-Posting-Host: acadia.ece.villanova.edu X-Trace: max.inside.misty.com 1222547526 17211 153.104.44.130 (27 Sep 2008 20:32:06 GMT) X-Complaints-To: abuse@misty.com NNTP-Posting-Date: Sat, 27 Sep 2008 20:32:06 +0000 (UTC) Xref: news.misty.com alt.home.repair:1048457 Edwin Pawlowski wrote: > > wrote in message >> >> If the light uses 15 watts and the fridge uses 5, on average, that's >> 20x24h = 480 Wh/day, ie 175 kWh/year if the room were always 40 F or >> 26x24h = 624 Wh/day if the room were always 70 F. It would be nice >> to get this down to 100 Wh, like the Mt. Best chest freezer fridge >> modification. >> >> With better controls, it might only need 5x23h = 120 Wh/day. Or 24h(40F-10F)1Btu/h-F/3.41Btu/h/W/3COP = 70 Wh/day, ie 26 kWh/year worth $2.60 per year at 10 cents/kWh, with a 10 F freezer compartment and a 40 F fridge compartment in a 40 F room. >The thermostat unit heats just that tiny portion of the unit to make the >freezer be colder. But the thermostat's in the fridge compartment, no? The fridge wants to be about 34 F... >To warm the entire refrigerator box with a 40W bulb is wasteful and will >warm the contents a bit. Who mentioned 40 watts? A bulb in the box would not change the box temp. Nick