Cheap, Off-Grid Cooling - A hybrid refrigerator will bring efficient, cheap cooling to India. "...A startup based in Cambridge, MA, has developed a new solar-powered refrigeration system for food storage in Indian villages that are off the grid.
Promethean Power Systems' design is a hybrid of conventional compressor-based refrigeration and thermoelectric materials--semiconductors that convert electricity into cooling and vice versa..."
Reference:
www.technologyreview.com
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