Photovoltaic Power for Walk-In Coolers
internal volumes ranging from 5 to 30 m3
temperature levels between 0° C and 7° C.
The alternative DC versus AC supply for the motor compressor has been analyzed with respect to specifications of the location site envisaged — very remote without technical staff available. To reduce routine maintenance a fully hermetic AC motor-compressor has been chosen in preference to a DC “open” compressor. Consequently a high efficiency (>90%) PWM 3 — phase 3 kVA inverter has been developed. A 10 m3 capacity prototype powered by a 2.2 kW peak photovoltaic panel has been designed and is now being tested at Séri Renault’s headquarters — Bois d’Arcy (France). By Fall’ 82, prototype will be sent to an agricultural centre in Ouagadougou (Upper Volta) for field testing.
KeywordsBattery Storage Routine Maintenance High Thermal Efficiency Variable Frequency Drive Photovoltaic Array
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