Trane International

A compressor includes a housing, an impeller, and inlet vanes disposed between a suction inlet of the housing and the impeller. The impeller rotates relative to the housing to compress suction working fluid from the suction inlet and intermediate working fluid from the intermediate inlet. The inlet vanes guide the suction working fluid flowing from the suction inlet to the impeller. One or more of the inlet vanes are configured to discharge the intermediate working fluid into the suction working fluid flowing across the inlet vanes. A heating, ventilation, air conditioning, and refrigeration (HVACR) system includes a refrigerant circuit with a compressor, a condenser, an expander, and an evaporator fluidly connected. A method of operating a compressor includes discharging intermediate working fluid from one or more inlet vanes into a flow of suction working fluid flowing across the inlet guide vanes.

A heating, ventilation, air conditioning, and refrigeration (HVACR) system includes a compressor, a first heat exchanger, a second heat exchanger, a first expander, and a flash tank fluidly connected. The system also includes a controller. The flash tank includes an inlet, a vapor outlet positioned at a top of the flash tank, and a liquid outlet positioned at a bottom of the flash tank. The flash tank is positioned downstream of the first expander. The first expander is positioned downstream of the first heat exchanger and the second heat exchanger. The controller is configured to control the first expander based on a degree of sub-cooling upstream of the first expander.

A climate control system for conditioning an interior space is described. The climate control system includes a chiller, an air handler and ducting. The climate control system additionally includes one or more controllers that are configured to set a first target for a performance metric for the airflow based on a desired climate parameter for the interior space. The one or more controllers of the climate control system further to set a second target for a heat transfer rate for the coil of the air handler based on the first target. In addition, the one or more controllers of the climate control system to adjust a flow rate of heat transfer fluid through the coil to reduce an error associated with the second target.

A method is described for operating a refrigerant circuit that includes a compressor with a driveshaft and one or more gas bearings for supporting the driveshaft. The method includes operating the refrigerant circuit in a first mode which includes supplying gaseous working fluid compressed by the compressor to the one or more gas bearings of the compressor, and the one or more gas bearings using the compressed gaseous working fluid to support the driveshaft. The method includes operating the refrigerant circuit in a second mode which includes supplying liquid working fluid to the one or more gas bearings of the compressor, and the one or more gas bearings using the liquid working fluid to support the driveshaft. A refrigerant circuit includes a compressor, a condenser, an expander, an evaporator, and a controller configured to selectively operate the refrigerant circuit in at least a first mode and a second mode.

A climate control system that includes a refrigerant compressor and a discharge line coupled to the refrigerant compressor is described. The climate control system further includes a muffler assembly in fluid communication with the discharge line. The muffler assembly can include an adjustable resonator that is in fluid communication with the discharge line, where the adjustable resonator has an adjustable internal volume. In addition, the climate control system includes a controller communicatively coupled to the adjustable resonator, wherein the controller is configured to adjust the adjustable internal volume of the adjustable resonator based at least in part on an operating speed of the refrigerant compressor to thereby attenuate a pressure pulsation in a flow of refrigerant emitted from the refrigerant compressor.

A climate control system that includes a refrigerant compressor (26) and a muffler assembly (100) in fluid communication with a discharge flow path coupled to the refrigerant compressor is described. The climate control system further includes that the muffler assembly is configured to attenuate pressure pulsations in a flow of refrigerant emitted from the refrigerant compressor. The muffler assembly includes a plurality of radial resonators (120,121,122), where each of the plurality of radial resonators defining a volume in fluid communication with the discharge flow path that extends radially outward from an inner diameter of the discharge flow path and circumferentially about a central axis of the discharge flow path.

An evaporator (100) is for a heating, ventilation, air conditioning, and refrigeration (HVACR) system and includes a shell (110) with an internal space (112), tubes (122) for a process fluid extending through the internal space, and a displacement array (130) disposed in the internal space. The displacement array includes baffles (140), demisters (160), and channels that extend through the displacement array. Each channel includes a demister portion and a baffle portion configured to discharge gaseous working fluid into the demister portion shaped to remove entrained liquid working fluid. A method for operating an evaporator includes directing working fluid into an internal space of a shell, and heating, with working fluid flowing though tubes, the working fluid within channels of a displacement array to generate gaseous working fluid. The method further includes directing gaseous working fluid from a baffle portion through a demister portion in each channel to remove entrained liquid working fluid.

A heating, ventilation, air conditioning, and refrigeration (HVACR) system includes a plurality of devices, and a controller. The controller is configured to generate an operation parameter based on an input, control the plurality of devices to operate based on the operation parameter when the operation parameter is outside of a predetermined operation region, and control the plurality of devices to operate based on a plurality of parameters differing from the operation parameter when the operation parameter is within the predetermined operation region.

The ordering or staging of packaged units corresponding to an array thereof includes detecting environmental conditions proximate to the array, selecting a calculation for ordering the packaged units based on at least one of the detected environmental conditions, executing the selected calculation for each of the packaged units included in the array, and ranking the respective packaged units based on respective results of the executed calculation. The selected calculation for each of the respective packaged units factors an operational coefficient, a weighted value of a detected runtime, and at least one of a detected intake air temperature or a detected wind speed

A heating, ventilation, air conditioning, and refrigeration (HVACR) system includes a compressor, a condenser, a liquid-vapor separator having a vapor outlet and a liquid outlet, a cascade heat exchanger, an expander, and an evaporator fluidly connected. The system also includes a modulator disposed downstream of the liquid outlet, and a controller. The controller is configured to determine an operation parameter of the system, and to control the modulator to modulate a liquid flow from the liquid outlet based on the determined operation parameter. The expander is disposed downstream of the liquid outlet. The cascade heat exchanger is disposed downstream of the vapor outlet. The modulator is disposed between the liquid outlet and the vapor outlet and upstream of the cascade heat exchanger.