A transport refrigeration unit (TRU) system is provided for use with a refrigerated cargo system. The TRU system includes a fuel cell configured to generate power for the TRU so that the TRU can refrigerate an interior compartment of the refrigerated cargo system, a cryo-compressed fuel tank to store a supply of cryo-compressed hydrogen, a heat exchanger and a conduit system configured to transport the cryo-compressed hydrogen from the cryo-compressed fuel tank, through the heat exchanger for promoting refrigeration of the interior compartment, and to the fuel cell.

A climate control circuit for a transport climate control system is provided. The circuit includes a compressor, a plurality of evaporators, a suction flow control device, and a controller. The suction flow control device is downstream of the plurality of evaporators and directs the working fluid from each of the evaporators to one of a main suction port and an auxiliary port of the compressor. The controller determines whether each of the evaporators is operating in a fresh temperature range or in a frozen temperature range. For each of the evaporators operating in the fresh temperature range, the controller instructs the suction flow control device to direct the working fluid from the corresponding evaporator to the auxiliary suction port. For each of the plurality of evaporators operating in the frozen temperature range, the controller instructs the suction flow control device to direct the working fluid to the main suction port.

A parking cooler which is capable of battery powered operation during engine off operation. The parking cooler or air conditioning system may vary in cooling capacities to maximize cooling or maximize battery life. The parking cooler includes one or more condensers and a housing to accommodate such variation of cooling capacity.

A power distribution unit (PDU) for use with an electrically powered accessory is disclosed. The PDU includes at least one power input configured to receive electrical power from an electrical supply equipment and/or a second power source. The PDU also includes an accessory power interface configured to provide power to the electrically powered accessory. The PDU further includes a vehicle power interface configured to provide power to a vehicle electrical system of the vehicle. Also the PDU includes at least one switch configured to selectively connect the at least one power input to a power bus, and selectively connect the power bus to at least one of the accessory power interface and the vehicle power interface. The PDU also includes a controller configured to control the at least one switch to provide power to the electrically powered accessory and/or the vehicle electrical storage device of the vehicle electrical system.

An air conditioning system and method for operation at a recreation vehicle is provided. The air conditioning system includes an inverter operably coupled to a motor. The inverter is configured to provide power to the motor in a first operating mode or a second operating mode. The motor is operably coupled to a compressor. A controller is in operable communication with the air conditioning system. The controller is configured to obtain a power limit signal; receive a control command corresponding to providing power to the air conditioning device; and determine, based on a power limit, whether to receive power at the air conditioning device in the first operating mode or the second operating mode.

Methods and systems for controlling a multipurpose power converter for converting power for a transport climate control system are provided. The multipurpose power converter includes a rectifier having a first leg, a second leg, and a third leg. The multipurpose power converter also includes a first switch, a second switch, and an inductor-capacitor network. The first switch and the second switch are connected to the third leg. The inductor-capacitor network is connected to the first switch. When the first switch is on and the second switch is off, the multipurpose power converter is configured as a single-phase AC power converter. When the first switch is off and the second switch is on, the multipurpose power converter is configured as a three-phase AC power converter.

A heat pump system for a vehicle may include a cooling apparatus including a radiator, a first water pump, a first valve, and a reservoir tank which are connected through a coolant line, and configured to circulate a coolant in the coolant line to cool at least one electrical component provided in the coolant line; a battery cooling apparatus configured to include a battery coolant line connected to the reservoir tank through a second valve, and a second water pump and a battery module which are connected through the battery coolant line to circulate the coolant in the battery module; and a heating apparatus including a heating line connected to the coolant line through a third valve to heat a vehicle interior by use of a coolant and a third water pump provided on the heating line, and a heater.

A stator contains a stator assembly having a number of stator teeth, which are provided with coils of a multi-phase stator winding, and a contact device for interconnecting axially orientated coil ends of the coils with a number of phase connections. The contact device has an interconnection ring fitted on the stator assembly on the end side and has integrated bus bars for interconnecting the coils with the phase connections. The contact device has a ring cover fitted on the interconnection ring. The interconnection ring has a number of axial through-openings corresponding to the number of coils ends, through which the coils ends are guided. The bus bars have contact tabs at the ends of the bar, which are arranged in a region of the through-openings, and on which a respective coil end is contacted. The ring cover covers the coil ends and contact tabs.

A cooling system using carbon dioxide as a coolant comprises a cooling chamber for storing products to be cooled during transport and a cooling unit for cooling the atmosphere in the cooling chamber. The cooling chamber and the cooling unit are mounted on or integrated in a cooling vehicle like a truck, a railway wagon or a ship. The cooling unit comprises a carbon dioxide storage compartment and at least one cooling channel through which air is led from and to the cooling chamber. The carbon dioxide storage compartment and the cooling channel are separated from each other by a thermal well-conducting but gas-tight plate serving as a heat exchanger between the carbon dioxide in the carbon dioxide storage compartment and the air in the cooling channel.

Methods and systems for power management are provided. Aspects include receiving, by a controller, load data associated with two or more refrigeration systems, wherein the two or more refrigeration systems comprise at least a first refrigeration system and a second refrigeration system, determining, by the controller, an available power capacity for the first refrigeration system and the second refrigeration system, operating, by the controller, the first refrigeration system and the second refrigeration system in a plurality of modes based at least in part on the load data and the available power capacity, wherein the plurality of modes comprise an unloaded mode and a plurality of loaded modes.