Phase change thermal management system for electronic racks

A data center, comprising:

• an electronic rack, including:
• a rack manifold having a rack liquid supply to receive first cooling liquid from a cooling source and a rack vapor return to return vapor to the cooling source, and
• a plurality of server chassis arranged in a stack, each server chassis including one or more cold plates associated with one or more information technology (IT) components;
• and
• a thermal management system coupled to the electronic rack, the thermal management system having an auxiliary thermal management unit, wherein the auxiliary thermal management unit comprises:
• a vapor inlet line,
• a liquid outlet line,
• a phase change unit, comprising a condenser and a compressor,
• a vapor buffer unit coupled between the vapor inlet line and the phase change unit, and
• a liquid buffer unit coupled between the liquid outlet line and the phase change unit, wherein the auxiliary thermal management unit is to form a double-buffered vapor-liquid loop between the vapor inlet line and the liquid outlet line, wherein the vapor inlet line is coupled to the rack vapor return of the electronic rack to receive vapor, wherein the liquid outlet line is coupled to the rack liquid supply of the electronic rack to supply cooling liquid.

A data center, comprising:

• a plurality of electronic racks, each of the plurality of electronic racks comprising:
• a rack manifold having a rack liquid supply to receive first cooling liquid from a cooling source and a rack vapor return to return vapor to the cooling source, and
• a plurality of server chassis arranged in a stack, each server chassis including one or more cold plates associated with one or more information technology (IT) components;
• a plurality of main thermal management units, wherein each of the plurality of main thermal management units is coupled to one of the plurality of electronic racks;
• and
• an auxiliary thermal management unit coupled to at least one of the electronic racks, wherein the auxiliary thermal management unit comprises:
• a vapor inlet line,
• a liquid outlet line,
• a phase change unit, comprising a condenser and a compressor,
• a vapor buffer unit coupled between the vapor inlet line and the phase change unit, and
• a liquid buffer unit coupled between the liquid outlet line and the phase change unit, wherein the auxiliary thermal management unit is to form a double-buffered vapor-liquid loop between the vapor inlet line and the liquid outlet line, wherein the vapor inlet line is coupled to a vapor line of a main thermal management unit and the rack vapor return of the at least one electronic rack, wherein the liquid outlet line is coupled to a liquid line of the main thermal management unit and the rack liquid supply of the at least one electronic rack.