From Eng-Leong_Foo_MIRCEN-KI@micforum.ki.se Fri May 6 22:52:34 1994 Date: Mon, 2 May 1994 16:29:00 -0100 From: Eng-Leong_Foo_MIRCEN-KI@micforum.ki.se Reply to: "Announcements: Ecotechnology conference 1994" To: Multiple recipients of list ET-ANN Subject: ET-012: The Solar Oven: A Tool of Sustenance ECOTECH'94 invites you to join the discussion of the paper entitled: "The Solar Oven: A Tool of Sustenance" by Mark Harrington (U.S.A.) To receive this paper (available on May 9th), please join the electronic mailing list "ET-LOKE". Address your e-mail to: listserv@searn.sunet.se with the following message: SUBSCRIBE ET-LOKE yourname Mark's vocation is as an Industrial Hygienist for the State of California. His avocation is the design and construction of solar ovens and other appropriate technology tools. He is currently writing a book exploring new paths toward global sustainability. His interests range from Anthropology, travel, mythology, microbiology, shamanism, farming, music, and beyond... =================================================================== From: Mr Eng-Leong Foo (ECOTECH'94 Network Manager) UNESCO Microbial Resources Center, Karolinska Inst. 17177 Stockholm, E-mail: eng-leong.foo@mtc.ki.se Fax: 46-8-331547 ************************************ To signoff from ET-ANN, email LISTSERV@SEARN.SUNET.SE with message: SIGNOFF ET-ANN From mikep@pegasus.unm.edu Sat Dec 31 20:03:30 EST 1994 Article: 3819 of alt.energy.renewable Path: bigblue.oit.unc.edu!concert!rutgers!dziuxsolim.rutgers.edu!uunet!pipex!swrinde!sdd.hp.com!news.cs.indiana.edu!lynx.unm.edu!pegasus!mikep From: mikep@pegasus.unm.edu (Mike Prine CIRT) Newsgroups: alt.energy.renewable Subject: Solar Oven tests Date: 31 Dec 1994 01:11:20 GMT Organization: University of New Mexico, Albuquerque Lines: 48 Message-ID: <3e2b3o$ngd@lynx.unm.edu> NNTP-Posting-Host: pegasus.unm.edu X-Newsreader: TIN [version 1.2 PL2] Well, while I had hoped for something grand to report like "We cooked our christmas dinner in our solar oven", due to weather that wasn't possible. I have to settle for reporting that we reheated leftovers and baked bread on the 29th. It took about 2 hours for the bread which even managed to get a little brown despite the relatively low temp of 275. On the 24th I conducted a water boiling test in which 1 quart of water was placed in a covered pyrex dish. The air temperature was in the mid to low 50s durring the test. Here are the air and water temps observed Time Air Water 12:00 ? 65 12:15 80 150 12:30 105 190 12:45 127 210 13:00 149 225 13:15 170 240 13:30 186 240 Steam observed on oven window 13:45 194 250 Let steam out and wiped glass 14:00 196 250 unsealed oven to let steam escape 14:20 194 240 At the end of the test bubble were observed in the water but definitly not what you would call a rolling boil. Still it was hot enough to sterilize stuff in. The parabolic collectors reach higher temperatures and are better if all you want to do is boil water but the box types are quite adequate for cooking in, even in winter if the sky is clear. Our oven is a "Sun Oven" manufactured by Burns-Milwaukee Inc. It has interior dimensions of 14"W 14"D 9"H but due to the pivoted cooking tray not all that volume is avaliable for food. The tray is removable for cleaning but except in high summer is needed to allow the oven to be tilted up to face the sun. Cost $150-$200. They are built to last so you might find a used one for sale at a lower price. They are sold thru Real Goods and most other places that deal in solar products. Since we just got it this summer I haven't had much time to experiment but plan on taking it to the park and on campouts next year to find out for ourselves how well it works. At first glance though I'm quite happy with it and expect to get a fair amount of educational milage from it by showing others the advantages of solar energy. -- I get most of my electricity, at home, from the sun. | Bitnet: mikep@unmb It's a hobby, who cares if it's cost effective! | Internet: mikep@unm.edu University of New Mexico in Albuquerque New Mexico, USA 2701 Campus Blvd NE 87131-6046 USA Phone: 505-277-8135