Refrigeration system with heat pump compression

Abstract

A refrigeration system may have a main refrigeration circuit including at least a first compression stage, a first refrigerant cooling stage, and an evaporation stage, a refrigerant circulating between the first compression stage, the first refrigerant cooling stage and the evaporation stage in a refrigeration cycle. A heat pump compression system may be in fluid communication with the main refrigeration circuit, the heat pump compression system including a second compression stage and a second refrigerant cooling stage in which said refrigerant circulates. A controller unit may be configured for operating the refrigeration system such that the heat pump compression system has a reclaim mode in which heat is reclaimed in the second cooling stage at a higher temperature than in the first cooling stage, and a cooling mode in which the first compression stage and the second compression stage operate concurrently to meet a cooling load of the evaporation stage.

Dependencies are inferred from the claim text.