Compressor system for heating, ventilation, air conditioning & refrigeration system

A vapor compression system for a heating, ventilation, air conditioning, and/or refrigeration (HVAC&R) system, wherein the vapor compression system is configured to circulate a working fluid therethrough, and the vapor compression system comprises:

• a first economizer configured to reduce a first pressure of the working fluid in the first economizer to provide a first vapor working fluid flow;
• a second economizer configured to reduce a second pressure of the working fluid in the second economizer to provide a second vapor working fluid flow;
• an evaporator configured to place the working fluid in the evaporator in a heat exchange relationship with a cooling fluid to provide a third vapor working fluid flow;
• and
• a compressor system, comprising:
• a first compressor stage comprising a first inlet and a second inlet, wherein the first inlet is configured to receive a first working fluid flow, and the second inlet is configured to receive a second working fluid flow, separate from the first working fluid flow;
• and
• a second compressor stage comprising a third inlet configured to receive a third working fluid flow, wherein each of the first working fluid flow, the second working fluid flow, and the third working fluid flow comprises a different one of the first vapor working fluid flow, the second vapor working fluid flow, and the third vapor working fluid flow.

A heating, ventilation, air conditioning, and/or refrigeration (HVAC&R) system configured to circulate a working fluid therethrough, wherein the HVAC&R system comprises:

• an economizer system comprising one or more economizers configured to reduce a pressure of the working fluid in the one or more economizers to provide one or more vapor working fluid flows;
• and
• a compressor system comprising:
• a first compressor stage comprising a first inlet and a second inlet, wherein the first compressor stage is configured to receive a first vapor working fluid flow of the one or more vapor working fluid flows via the second inlet, and the first compressor stage is configured to receive an additional working fluid flow, separate from the first vapor working fluid flow, via the first inlet;
• and
• a second compressor stage comprising a third inlet, wherein the second compressor stage is configured to receive a second vapor working fluid flow of the one or more vapor working fluid flows via the third inlet.