A power supply unit (14) provided with a transport refrigeration unit (12) includes an insulated battery box (60), a heat exchanger (64), and a battery (62). The heat exchanger (64) is disposed within the insulated battery box (60). The heat exchanger (64) has a heat exchanger inlet (80) that is fluidly connected to a compressor outlet (42) and a heat exchanger outlet (82) that is fluidly connected to a refrigeration unit heat exchanger inlet (50). The battery (62) is disposed within the insulated battery box (60).

Embodiments of systems and methods for starting an electronically controlled engine of a TRS by supplying power from a battery, are provided. The engine is electronically controlled by an engine control unit (ECU). The systems and methods can achieve a complete engine start even when the ECU experiences a reset during the startup of the engine.

A system includes a first heat exchanger, a flash tank, a first compressor, a condenser, a second heat exchanger, and a second compressor. The first heat exchanger removes heat from carbon dioxide refrigerant. The flash tank stores the carbon dioxide refrigerant from the first heat exchanger. The first compressor compresses the carbon dioxide refrigerant and sends the compressed carbon dioxide refrigerant to the first heat exchanger. The condenser removes heat from a second refrigerant. The second heat exchanger receives the second refrigerant from the condenser. The second heat exchanger further removes heat from the carbon dioxide refrigerant stored in the flash tank. The second compressor compresses the second refrigerant from the heat exchanger. The second compressor sends the second refrigerant to the condenser.

A mobile environment-controlled unit comprising a chassis, a compartment supported by the chassis, and an environmental-control system in environmental communication with the compartment. The environmental-control system is configured to control an environmental parameter of the compartment. The environmental-control system includes an AC Alternator and a controller. The AC alternator is powered by an internal combustion engine and supplies electrical power for the environmental-control system. The controller is configured to monitor the environmental parameter of the compartment, monitor one or more electrical parameters of the AC alternator, control the environmental-control system based on the monitored environmental parameter, and control the AC alternator based on the monitored parameters of the alternator.

A hybrid vehicle, an air conditioning system and a method for controlling the air conditioning system are provided. The air conditioning system includes: an electric compressor; a mechanical compressor, connected with the electric compressor in parallel; a power battery, connected with the electric compressor and configured to supply power to the electric compressor; an engine, connected with the mechanical compressor and configured to supply a power source to the mechanical compressor; an engine controller, connected with the engine and configured to start the engine when the mechanical compressor is to be started; a battery manager, connected with the power battery and configured to detect a state of charge of the power battery; and a controller, connected with the engine controller and the battery manager and configured to start the electric compressor and the mechanical compressor at different time according to the state of charge of the power battery.

A method of operating a transport refrigeration system is provided. The method includes electrically powering a first plurality of components of a first refrigeration unit and a second plurality of components of a second refrigeration unit, wherein electrically powering comprises operating a prime mover and an electric generation device. The method also includes monitoring a plurality of operating parameters of the first refrigeration unit. The method further includes monitoring a plurality of operating parameters of the second refrigeration unit. The method yet further includes calculating a combined power load of the first refrigeration unit and the second refrigeration unit. The method also includes comparing the combined power load to a maximum available power of the prime mover.