A method for a refrigeration system includes applying, by a gas cooler of the refrigeration system, a first cooling stage to refrigerant circulating through the refrigeration system load. The method further comprises applying, by a heat exchanger located downstream from the gas cooler, a second cooling stage to the refrigerant, wherein the second cooling stage removes heat from the refrigerant, and applying, by the heat exchanger located downstream from the gas cooler, the heat removed during the second cooling stage to a water heating system operable to heat water.

Disclosed is a refrigeration unit having an accumulator, a refrigeration system and a method for controlling a refrigeration unit having an accumulator, wherein the refrigeration unit has a refrigeration chamber for receiving and storing goods to be refrigerated, an accumulator having an accumulator holder in which a storage medium is accommodated, a heat exchanger, a controller and a coolant line arrangement which can be connected to a coolant supply network via connections. The coolant line arrangement is guided through the accumulator holder, and the heat exchanger is thermally coupled to the storage medium accommodated in the accumulator holder. A coolant control device is arranged in the flow pipe of the coolant arrangement, wherein the storage medium accommodated in the accumulator holder is cooled via a coolant in the coolant line arrangement, and the heat exchanger is cooled via the storage medium.

A method includes receiving moisturized air from a refrigerated room and absorbing, in a portion of a desiccant wheel, moisture from the moisturized air, wherein absorbing moisture from the moisturized air produces dehumidified air. The method further includes discharging the dehumidified air to the refrigerated room.

A refrigeration system includes an evaporator within which a refrigerant absorbs heat, a gas cooler/condenser within which the refrigerant rejects heat, a compressor operable to circulate the refrigerant between the evaporator and the gas cooler/condenser, a high pressure valve operable to control a pressure of the refrigerant at an outlet of the gas cooler/condenser, and a controller. The controller is configured to automatically generate a setpoint for a measured or calculated variable of the refrigeration system based on a measured temperature of the refrigerant at the outlet of the gas cooler/condenser. The setpoint is generated using a stored relationship between the measured temperature and a maximum estimated coefficient of performance (COP) that can be achieved at the measured temperature. The controller is configured to operate the high pressure valve to drive the measured or calculated variable toward the setpoint.

A digital smart real showcase warning system (100) comprises a showcase (110), a freezing machine (20), a showcase control unit (18), and a portable device (70), wherein a control unit (81) of the showcase control unit (18) inputs a temperature of the showcase (110) over time, and determines that a freezing function for the showcase (110) is failing based on the inputted temperature, the control unit (81) calculates an expected date and time of an increase to a warning temperature (an increase in temperature of a product in the showcase (110) to a predetermined temperature so high as to be unsuitable for refrigerating and freezing), and the control unit (81) causes a notifying means (87) to warning-display the expected date and time and to transmit warning information to the portable device (70), whereby the occurrence of a product loss can be prevented.

A refrigeration system includes a refrigeration circuit and a coolant circuit separate from the refrigeration circuit. The refrigerant circuit includes a gas cooler/condenser, a receiver, and an evaporator. The coolant circuit includes a heat exchanger configured to transfer heat from a refrigerant circulating within the refrigeration circuit into a coolant circulating within the coolant circuit, a heat sink configured to remove heat from the coolant circulating within the coolant circuit, and a magnetocaloric conditioning unit configured to transfer heat from the coolant within a first fluid conduit of the coolant circuit into the coolant within a second fluid conduit of the coolant circuit. The first fluid conduit connects an outlet of the heat exchanger to an inlet of the heat sink, whereas the second fluid conduit connects an outlet of the heat sink to an inlet of the heat exchanger.

A dual reclaim coil with a smart control application is provided that allows the refrigerant inlet to the HVAC unit switch between the two sides of the condenser is aimed to use the high temperature and pressure of the condenser/gas cooler outlet while a CO.sub.2 refrigerant system is operating above critical point. This occurs in hot ambient conditions, when the need for heating in the space is not as great as in the wintertime and the available heat at the condenser/gas cooler's outlet is sufficient to satisfy the heating load. This also mitigates space overcooling, while increasing the CO.sub.2 transcritical system's efficiency by subcooling the refrigerant for applications involving dehumidification HVAC systems which often results in a phenomenon called overcooling during the dehumidification season.

A heat exchanger for a temperature controlled case is disclosed herein. A temperature controlled case includes a housing that defines a temperature controlled space. The housing includes a duct that receives circulated air. A heat exchanger is coupled to the housing and disposed within the duct. The heat exchanger includes an intake face at a non-perpendicular angle relative to an air flow direction in the duct immediately upstream of the heat exchanger.

A refrigeration system for a temperature-controlled storage device includes a refrigeration circuit that circulates a refrigerant, a separate cooling circuit that circulates a coolant, and a controller. The refrigeration circuit includes a compressor, a condenser, an expansion device, and an evaporator. The cooling circuit includes a pump, a control valve, and a heat removing device in fluid communication with the condenser via the coolant. The controller is operatively coupled to the control valve and configured to identify a coolant temperature differential setpoint, monitor a temperature of the coolant provided to the condenser by the cooling circuit, calculate a coolant temperature differential based on the temperature of the coolant provided to the condenser, and operate the control valve to modulate a flow of the coolant through the condenser to drive the coolant temperature differential to the coolant temperature differential setpoint.

A CO.sub.2 refrigeration system includes a CO.sub.2 refrigeration subsystem that provides cooling for a refrigeration load using carbon dioxide (CO.sub.2) as a refrigerant. The CO.sub.2 refrigeration system further includes a direct CO.sub.2 heat exchange subsystem that uses the CO.sub.2 refrigerant from the CO.sub.2 refrigeration subsystem to provide heating or cooling for a building zone. The direct CO.sub.2 heat exchange subsystem includes a heat exchanger that exchanges heat directly between the CO.sub.2 refrigerant and an airflow provided to the building zone.