MINNEAPOLIS — Stop & Shop, Quincy, Mass., is the latest chain to test a subcritical cascade refrigeration system using carbon dioxide as the refrigerant for low-temperature cases. The chain plans to open a store in West Hartford, Conn., in November with that system, Kenneth Welter, manager, refrigeration engineering for Stop & Shop, told SN at the Food Marketing Institute's Energy & Store Maintenance Conference here. The store will also have a secondary-loop refrigeration system ...

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