The frozen food processing industry is striving to minimize or eliminate HCFC and HFC refrigerants, reduce ammonia refrigerant charge and look for alternative natural refrigerant options with similar or better energy efficiency. One attractive option is an ammonia/carbon dioxide cascade refrigeration system.
Visit the link below for comparisons of two traditional ammonia systems—single-stage economized and two-stage ammonia and an ammonia/carbon dioxide cascade system. For purposes of comparison, a spiral/tunnel/blast freezing application will be compared at a -58°F coil temperature.