Solar-powered refrigerator using a mixture of glycerin,...

Details Solar-powered refrigerator using a mixture of glycerin,... Solar-powered refrigerator using a mixture of glycerin,...

2008-06-06

2009-06-09

Tapolcai, William E (Department: 3744)

Refrigeration

Utilizing solar energy

C062S059000, C062S434000

Reexamination Certificate

active

07543455

ABSTRACT:
A solar-powered refrigerator is disclosed. It uses a solar photovoltaic panel to convert solar energy to electricity to power a DC motor. The DC motor drives the compressor of a vapor-compression refrigeration system to freeze an energy-storage vessel, located in the freezer. The energy-storage vessel is filled with a mixture of glycerin, alcohol and water, with a freezing point of 10° F. to −10° F. In the absence of sunlight, the temperature of the frozen mixture can maintain near its freezing point for more than one day. The temperature of the refrigerator is maintained to a desirable value, for example 37° F., by a pair of heat-exchange coils and a thermostat, with or without sunlight.

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patent: 2001/0041210 (2001-11-01), Kauffeld et al.

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