Cold storage basically works on the ‘vapor compression refrigeration cycle’ to produce cooling.
The schematic of the working of a cold storage is shown in the figure below:
Fig: Cold Storage Plant
Working of cold storage plant
The compressor compresses vaporized refrigerant(Ammonia) to high pressure and high temperature to raise the boiling point of refrigerant.
The condenser then liquefies the vaporized refrigerant to high-pressure and high-temperature state. Thus, heat rejection takes place
The condensate from the condenser is collected in a reservoir and allow to pass through an expansion valve where its pressure and temperature decrease from earlier state.
The low-pressure liquid refrigerant then allows passing through refrigerated space whereby the heat of hot air of refrigerated space starts evaporating the liquid refrigerant hence, heat in the atmosphere decrease and cooling is produced.
Blowers circulates the chilled air to stored fruits and vegetables.
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