Solar ice makers   

A solar ice maker would be useful for disaster relief, refugee camps, and developing nations, as well as camping and simply reducing energy use.

Examples:

• Researchers at San Jose State University in California say they have created an ice making machine that uses the heat from sunlight to power a chemical reaction. Solar Ice Maker: No Moving Parts, No Electricity, greenUPGRADER, September 17, 2008.
• The Design and Development of a Solar Powered Refrigerator

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