HARRISBURG, Pa.— Refrigeration manufacturer Hill Phoenix, Conyers, Ga., announced this week that a Giant Food Stores outlet here is using a Second Nature secondary loop refrigeration system for its medium-temperature display cases and walk-in coolers. The system uses a propylene glycol fluid as a cooling medium instead of R404A refrigerant, eliminating the circulation of high-pressure refrigerant throughout the store floor and achieving a 50% reduction in refrigerant charge. The system uses ...

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