Liquid Distribution Unit Design for Liquid Cooling of Electronic Racks of a Data Center

A data center system, comprising:

• an array of electronic racks, each electronic racks containing a plurality of server blades and each server blade corresponding to one or more servers, wherein each electronic rack comprises:
• a rack manifold having a rack liquid supply line to receive first cooling liquid from a cooling liquid source and a rack liquid return line to return first warmer liquid back to the cooling liquid source;
• a plurality of server blades arranged in a stack, each server blades including one or more cold plates associated with one or more information technology (IT) components;
• and
• a set of one or more liquid distribution units (LDUs) coupled between the rack manifold and the server blades, wherein each LDU includes a LDU container,
• a liquid supply port to receive the first cooling liquid from the rack supply line to be contained within the LDU container,
• a liquid return port to return the first warmer liquid from the LDU container to the rack liquid return line to form a primary liquid distribution loop,
• one or more pairs of supply sub-ports and return sub-ports, each pair supplying and returning second cooling liquid to and from at least one of the cold plates of the server blades, and
• a heat exchange channel coupled to the pairs of supply sub-ports and return sub-ports to form a secondary liquid distribution loop, wherein the heat exchange channel traverses through the first cooling liquid contained in the LDU container for heat exchange, without direct contact between the first cooling liquid and the second cooling liquid.

An electronic rack of a data center, comprising:

• a rack manifold having a rack liquid supply line to receive first cooling liquid from a cooling liquid source and a rack liquid return line to return first warmer liquid back to the cooling liquid source;
• a plurality of server blades arranged in a stack, each server blades including one or more cold plates associated with one or more information technology (IT) components;
• and
• a set of one or more liquid distribution units (LDUs) coupled between the rack manifold and the server blades, wherein each LDU includes
• a plate heat exchanger having a primary loop and a secondary loop,
• a liquid supply port coupled to the primary loop of the plate heat exchanger to receive the first cooling liquid from the rack supply line,
• a liquid return port coupled to the primary loop of the plate heat exchanger to return the first warmer liquid to the rack liquid return line, and
• one or more pairs of supply sub-ports and return sub-ports coupled to the secondary loop of the plate heat exchanger, wherein each pair of supply sub-port and return sub-port is configured to supply and return second cooling liquid to and from at least one of the cold plates of the server blades via a respective liquid distribution tube coupled to the at least one cold plate.