A fluid handling system includes a pressure exchanger (PX) configured to receive a first fluid at a first pressure and a second fluid at a second pressure and exchange pressure between the first fluid and the second fluid. The system further includes a condenser configured to provide corresponding thermal energy from the first fluid to a corresponding environment. The system further includes a receiver to receive the first fluid output by the PX. The receiver forms a chamber to separate the first fluid into a first gas and a first liquid. The system further includes a first booster to increase pressure of a portion of the first gas to form the second fluid at the second pressure and provide the second fluid at the second pressure to the PX.

A method for estimating refrigerant charge for an HVACR system is provided. The method includes obtaining one or more system parameters during operation. The one or more system parameters include at least one of compressor suction superheat, system mass flow, expansion device mass flow or opening degree, compressor suction saturated temperature, and compressor discharge saturated temperature. The method also includes conducting a regression analysis on the one or more system parameters to determine one or more predictive parameters for estimating the refrigerant charge. The method further includes determining a predictive model based on regression analysis. The predictive model establishes a relationship between the refrigerant charge and the one or more predictive parameters. Also the method includes estimating the refrigerant charge based on the predictive model.

An automatic and dynamic filter window for the air inlet to a chiller or cooler is disclosed, including a controller and a scrolling filter for replacing filters prior to clogging or contamination that may compromise the operation of the chiller.

A transport climate control system for a climate controlled transport unit includes a main heat transfer circuit and a chiller heat transfer circuit. The main heat transfer circuit includes a compressor, a condenser, a main expansion valve, a main evaporator, a chiller expansion valve, and a chiller evaporator. The main evaporator and a chiller evaporator positioned are in parallel to each other downstream of the condenser. Working fluid and a second process fluid flowing through the main evaporator. Working fluid and a third process fluid flowing through the chiller evaporator. The chiller heat transfer circuit includes the chiller evaporator and the third process fluid is configured to provide auxiliary cooling. A method of operating a transport climate control system for a climate controlled transport unit includes operating in a HVACR and chiller mode, operating in a HVACR mode, and operating a chiller mode.

A centrifugal compressor for a chiller includes an impeller, a motor, a diffuser, and at least one injection port. The impeller is attached to a shaft rotatable about a rotation axis. The motor is arranged and configured to rotate the shaft in order to rotate the impeller. The diffuser is disposed downstream from the impeller. The at least one injection port is located within the diffuser. The at least one injection port is configured and arranged to supply liquid refrigerant into the diffuser from a condenser or an economizer of the chiller.

An air-conditioning system includes a heat source unit, an air conditioner connected via piping to the heat source unit and configured to perform heat exchange between water supplied by the heat source unit and indoor air, a water circulation device for circulating the water between the heat source unit and the air conditioner, and an air-conditioning control device. The air-conditioning control device controls the heat source unit to lower temperature of the water flowing into the air conditioner, in accordance with an increase in an indoor humidity, and controls the water circulation device to lower temperature of the water flowing from the air conditioner back to the heat source unit, in accordance with an increase in an indoor temperature.

A method of operating a refrigeration system includes initiating a compressor shutdown operation, determining a difference in a saturation temperature at a port of a compressor of the refrigeration system and an ambient temperature and comparing the difference in the saturation temperature and ambient temperature with a threshold. If the difference in the saturation temperature and ambient temperature is less than or equal to the threshold, a pump down operation is performed and if the difference in the saturation temperature and ambient temperature exceeds the threshold, a compressor shutdown operation is completed.

In a method for operating a compressor (22) having an inlet (26) and an outlet (28), the method includes: running the compressor to compress a fluid; shutting down (422) the compressor; determining (420) a condition-dependent threshold restart pressure difference (threshold) across the compressor; relieving the pressure difference to reach the threshold; and, after the threshold is reached, restarting (434) the compressor.

Certain example embodiments provide a vapor compression refrigeration system, comprising: a compressor configured to suction refrigerant at a low pressure and temperature from a suction return, compress the refrigerant, and output refrigerant at a higher pressure and temperature; a condenser configured to cool refrigerant received from the compressor as the refrigerant passes though coils in the condenser; an expansion device configured to reduce the pressure of the refrigerant received from the condenser; and an evaporator configured to allow the refrigerant received from the expansion device to absorb heat surrounding the evaporator. The system may include a plurality of sensors configured to measure temperature of the system and a controller configured to control, based on the signals from one or more sensors, operation of the compressor and/or an evaporator fan motor configured to allow the refrigerant received from the expansion device to absorb heat surrounding the evaporator.

A refrigerated storage container is provided and includes a container housing defining an interior, an air conditioner operable to maintain control of temperatures within the interior and a local controller configured to cycle the air conditioner on and off within a time window based on waste heat ingestion from neighboring refrigerated storage containers.