Half a croissant, on a plate, with a sign in front of it saying '50c'
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Solar Refrigerator

Keeps the water bottle in the car cool.
  [vote for,

A small refridgerating device powered by a photovoltaic cell. It wouldn't have to be a great refridgerator that would keep a drink icy-cold or keep perishables safe to eat, but just enough of a fridge to keep a bottle of water not so hot that it's unpleasant to drink. Won't work when it's not sunny outside, but then it wouldn't need to work.
cranford, May 26 2004

Solar refrigerator for car http://www.polarpow...arge_solar_ref.htm#
[kbecker, Oct 04 2004]

Solar-Powered Refrigeration http://www.coolectrica.com/
off the grid in third-world countries. [jutta, Sep 27 2008]

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       sp: Refrigerator   

       A refrigerator is a heat pump. You need to move the heat from one place to another. Where would the heat go? Would you really want to pump it into your car on a hot day?
Worldgineer, May 26 2004

       Solar powered peltier device attached to side of beverage holder. Been done, but I can't find the link at the moment.
Freefall, May 26 2004

       The amount of heat pumped out of a small 'fridge (maybe 2,000 cm^3) is going to be insignificant when pumped into the interior of a car that would be at least 1,000,000,000 cm^3.   

       It would be like the amount of heat your home 'fridge pumps into your home.
GenYus, May 26 2004

       That's baked (link).
kbecker, May 27 2004

       //...a car that would be at least 1,000,000,000 cm^3.//   

       That's an awfully big car--about 500 times the size of mine.
ldischler, Sep 27 2008

       Converting solar energy into electrical energy to power a phase change device, is the long way around. You need a phase change that can be powered by a thermal process, solar concentrator (or in the absence of sunlight, yes it does occur) another thermal process. The "icy-ball" of yore achieves these objectives.
4whom, Sep 29 2008


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