REFRIGERATION SYSTEM WITH ABSORPTION COOLING

摘要

A refrigeration system for use with refrigerated LT and MT display cases in facilities such as supermarkets, has an absorption chiller that uses waste heat from a nearby source to provide cooling to the refrigeration system to take advantage of the synergy and improve overall efficiency of the refrigeration system. The cooling provided by the absorption chiller may be in the form of a coolant (e.g. water, glycol, water-glycol mixture, etc.) that circulates between the chiller and one or more of a pre-cooler, sub-cooler or condenser in the refrigeration system in a manner that uses waste heat from a nearby source to reduce the need for installed condensing capacity in the refrigeration system and improve thermal efficiency and obtain cost savings.

主权项

1. A refrigeration system having absorption chilling, comprising:
a low temperature portion and a medium temperature portion for circulating a CO2 refrigerant; the low temperature portion comprising at least one low temperature compressor and at least one low temperature load; the medium temperature portion comprising at least one medium temperature compressor and at least one medium temperature load; a heat exchanger configured to cool or condense CO2 refrigerant in a hot gas state from the medium temperature compressor; a sub-cooler configured to receive and cool the CO2 refrigerant from the heat exchanger; an absorption chiller configured to receive waste heat from a source and provides cooling to the CO2 refrigerant in the sub-cooler; a flash tank configured to receive the cooled CO2 refrigerant from the sub-cooler; a CO2 refrigerant vapor line communicating between a vapor portion of the flash tank and a suction side of the medium temperature compressor; and a CO2 refrigerant liquid line communicating between the flash tank and at least one of the medium temperature load and the low temperature load.