http://www.physics.byu.edu/research/energy/
Solar Funnel Cooker invented by Dr. Jones (1990's), including plans to build your own, discussed here: http://solarcooking.org/plans/funnel.htm . This paper explains how the same funnel can be used to make ice at night (with air temp about 50 F or less). Start with cardboard and foil cut to about 2 X 4 (0.6m X 1.2 m) OR start with Aluminized windshield reflector and cut so length is just twice the width (photo below, putting oven-safe plastic bag over painted-black canning jar on circular rack).
Dr. Jones has given several hundreds of the aluminized-mylar Solar Funnel Cookers to families in developing countries in Haiti, Bolivia, Kenya, Turkey and Ecuador, with the most recent solar-cookers given to folks in Mali (2006, see photo below) and Mozambique (2007). More will go to help refugees who have fled from Iraq and/or Kenya. Updates: http://solarcooking.org/saveheat.htm and especially http://solarcooking.org/research/McGuire-Jones.mht .
The latter paper compares the solar cooker made with windshield-reflector (OK) with the cardboard-and-aluminum-foil cooker (better), and it discusses a simple box cooker for low-sun days using just FOUR charcoal briquettes (see photos and data-graph below)...
- funnel1.jpg (5.12 KiB) Viewed 397 times
- funnel2.jpg (7.87 KiB) Viewed 397 times
- funnel3.jpg (6.6 KiB) Viewed 397 times
