Oil-free phase separating compressor

A heating, ventilation, air conditioning, and refrigeration (HVACR) system comprising:

• a refrigerant circuit including:
• an oil-free compressor configured to compress a working fluid, the oil-free compressor including:
• a compressor housing including a suction inlet and a discharge outlet,
• a compression mechanism disposed within the compressor housing, the compression mechanism having an inlet fluidly connected to the suction inlet and a discharge volume fluidly connected to the discharge outlet,
• a crankshaft engaged with the compression mechanism, rotation of the crankshaft configured to drive the compression mechanism to compress the working fluid,
• a bearing for supporting the crankshaft, and
• a liquid-vapor separation volume disposed within the compressor housing, the liquid-vapor separation volume configured to separate a mixed phase of the working fluid into liquid working fluid and a gaseous working fluid, wherein the liquid working fluid is supplied to the bearing;
• a condenser configured to cool the working fluid compressed by the oil-free compressor;
• one or more expanders configured to expand the working fluid cooled by the condenser;
• and
• an evaporator configured to cool a second process fluid using the working fluid expanded by the one or more expanders.