Message-ID: <199612141221.IAA22713@bud.peinet.pe.ca> Date: Sat, 14 Dec 1996 08:21:43 -0400 From: Stan Sandler <mailto:sandler@CYCOR.CA> Subject: Re: Street Foods To: Multiple recipients of list DEVEL-L <mailto:DEVEL-L@AMERICAN.EDU>
>Please, send us a draw of it. We work with street-children here and there
>are some years we are planning to sell healthy food on the streets. This
>solar heater would safe money in energy to keep the food hot and would be
>an important tool to promote our marketing and bring the media's attention.
>Thanks, Joaquim
Hi Joaquim:
This type of solar cooker would be a dismal failure for the type of use you have mentioned, that is, it will not keep food hot. But for that you could build either a solar box cooker (which can be just a cardboard box with newspaper for insulation, aluminum foil for the lining, a sheet of glass for the top, and a black pot to put the food in; if the side of the box cut for the glass is folded back and foil covered it will reflect extra sunlight in). Or you could keep food hot with a panel cooker which is just some shaped cardboard that is covered with foil and the food is placed in a plastic bag (but the food colour has to be dark or it must be in a dark pot or crock). Very nice plans for these can be seen at the Solar Cooking Archives (use a search engine).
The parabolic trough type cooker is very nice, cheap and light and easy to make but it can only cook hot dogs, small kebabs, or thin sausages. It only heats up along a thin line down the focus. If the sausages are very light in colour that can also be a problem. If you are still interested in plans you must give me a mailing address (snail) because it is far to difficult to draw in ASCII email :)
If you contacted your local newspaper and asked for the size (length and width) of the used aluminium type-transfer sheets I could cut out cardboard templates for parabolic ends that would fit. Then I could mail them to you and you could put them on the wood to mark it out. Ask them what the sheets cost, as I would like to have a file on their cost in various countries since I am designing a very large parabolic trough solar cooker that would heat oil to power an indoor cooker/oven. Anyone else reading this that knows what the sheets cost in their country/locality please email me at my private address. It will be appreciated.
Regards, Stan