An apparatus for air-conditioning of watercraft and the like including: an electronically controlled variable-r.p.m. compressor, a main gas/water condenser (5), at least one environmental heat-exchanger (3) with an electronically controlled fan (14), at least one electronically controlled expansion valve (8), and at least one first electronic control unit (4) programmed for calculating continuously a temperature deviation detected (DeltaT=T_adT_a), and as a function of the temperature deviation regulating in combination, the r.p.m. of the compressor (1), opening of the flow valve (8), and the r.p.m. of the fan of the heat-exchanger (3).

A climate-control system may include a compressor, a thermal storage device, an outdoor heat exchanger, an indoor heat exchanger, a first expansion device, and a second expansion device. The compressor may include an intermediate-pressure inlet, an intermediate-pressure outlet, a discharge outlet, a suction-pressure pocket, and a plurality of compression pockets. The thermal storage device may include a conduit and a phase-change material surrounding the conduit. The first expansion valve, the second expansion valve, the outdoor heat exchanger, the indoor heat exchanger, and the thermal storage device may be in fluid communication with the compressor. The climate-control system is operable in a charging mode and a discharging mode, and is operable in a cooling mode and a heating mode. The thermal storage device may be configured to absorb heat from a working fluid or to transfer heat to the working fluid.

A heat exchange system for controlling heat within an indoor space is provided. The system includes a heat exchanger located within the indoor space and a dual flow heat exchanger that is located in a space that is not temperature regulated by the system. The outdoor dual flow heat exchanger has flow through two different pluralities of parallel tubes that are interspersed between each other. The system includes a first expansion valve located within the indoor space to receive flow from one of the two sets of parallel tubes and cause flow to the indoor heat exchanger. The system includes a second expansion valve located in the non-temperature regulated space, wherein the second expansion valve receives flow from the second set of tubes and returns expanded lower pressure flow to the first set of tubes.

There is disclosed a reversible heat pump system 100 and a method of operating a reversible heat pump system to control the temperature of a process fluid of a chiller system 500. In a cooling mode, a working fluid is circulated for co-current flow with a process fluid at a heat exchanger 104 functioning as an evaporator heat exchanger, whereas in a heating mode, the working fluid is circulated for counter-current flow with the process fluid at the same heat exchanger 104 functioning as a condenser heat exchanger.

Heat pump comprising a first and a second heating circuit, comprising: an evaporator; one or more than one expansion valve; a compressor; a first condenser arranged in the first heating circuit and a second condenser arranged in the second heating circuit, wherein the first and the second heating circuit share a common line; wherein, during normal operation, only one of the first heating circuit and the second heating circuit defines an active circuit, whereas the other one simultaneously defines an inactive circuit; and wherein the heat pump further comprises a distributor comprising at least two valves, and a controller that is configured to selectively redistribute a refrigerant charge from the first heating circuit to the second heating circuit or vice versa to thereby, for the active circuit, actively optimize the amount of refrigerant in the condenser and in the evaporator for the actual operating conditions.

A heat pump system includes a compressor, a first heat exchanger, a second heat exchanger, and a valve device. The valve device includes a first connecting port connected to an exhaust port of the compressor, a second connecting port connected to a first port of the second heat exchanger, a third connecting port connected to an air suction port of the compressor, a fourth connecting port connected to a first port of the first heat exchanger, and a fifth connecting port connected to a fourth port of the first heat exchanger. In a refrigeration mode, the valve device fluidly couples the third connecting port to the air suction port, and the first heat exchanger operates as a falling film evaporator. In a heating mode, the valve device fluidly couples the first connecting port to the exhaust port, and the first heat exchanger operates as a condenser.

A heat exchange system for controlling heat within an indoor space is provided. The system includes a heat exchanger located within the indoor space and a dual flow heat exchanger that is located in a space that is not temperature regulated by the system. The outdoor dual flow heat exchanger has flow through two different pluralities of parallel tubes that are interspersed between each other. The system includes a first expansion valve located within the indoor space to receive flow from one of the two sets of parallel tubes and cause flow to the indoor heat exchanger. The system includes a second expansion valve located in the non-temperature regulated space, wherein the second expansion valve receives flow from the second set of tubes and returns expanded lower pressure flow to the first set of tubes.