...
Section | ||||||||
---|---|---|---|---|---|---|---|---|
|
...
- The zeer pot (pictured) makes use of evaporative cooling. It's difficult to find a figure for the the extent of cooling possible; it likely varies with pot and filler types.
- another zeer pot link: http://solarcooking.wikia.com/wiki/Pot-in-pot_cooler with experimentation results
- Cold Packs consist of ammonium nitrate (fertilizer) mixed with water. They can allegedly drop to 35F for 10-15 minutes. Combining the packs with a thermos or some type of insulator could allow us to maintain the required low temperature. Consuming a lot of the cold packs would be an immediate problem; ammonium nitrate would need to be produced on site.
- Traditional small-scale refrigerators could be modified to run on solar. A Duke design team has worked on this concept in the past.
- Thermoacoustic refrigeration would provide for some interesting experiments but would probably be less effective than a traditional design. Thermoacoustic and traditional methods both require electricity and the latter approach has higher efficiencies.
- Another possible design would be using a readymade portable USB mini fridge and powering it with AA batteries . The device costs about $35 and the AA battery power source can be built ourselves. The thing that we need to figure out is how much total power (C) the USB fridge needs, and how much the AA could provide. We could modify the design to incorporate larger C batteries or even 9V batteries.
Contact
if interested, contact Matt Ball (matt.ball.2 at gmail)
...