• Sardar Patel Renewable Energy Research Institute

Solar refrigerator

The Spreritech solar refrigerator is a high efficiency refrigerator that operates on 12 or 24 V DC supply from solar photovoltaic modules or storage battery. The model named TD 80 provides 80 litres storage capacity in two compartments to store a variety of essential items that require refrigeration. The strategically placed evaporator coils ensure uniform temperature throughout the refrigerator, thereby making it highly suitable for bulk storage. The design, features state-of-the-art skin condenser and highly energy efficient Danfoss BD35F DC compressor. Thermostat with 7 settings enables the user to obtain a wide range of temperature varying between -3 and 6 ?C. Mode of operation: The TD 80 refrigerator can be operated on two different modes depending on the grid power availability. The grid power in many locations in India is highly erratic making use of conventional AC refrigerators impractical. It offers an excellent option for such places. The battery bank can be charged in as little as five hours from the mains with the help of a charger. This makes the refrigerator highly dependable and economical for places with erratic grid power supply. In the vast number villages without grid power, the TD 80 can be operated with the help of solar photovoltaic modules. Depending on the application, solar photovoltaic modules of 100 to 200 W can provide satisfactory performance. The SPV modules charge the battery bank, which in turn operates the refrigerator. With a battery of 24V, 130 AH, "no sun autonomy" of up to 4 days can be obtained, making the refrigerator suitable for most of the critical applications.