Rack mounted liquid submersion cooled electronic system

A system, comprising:

• a rack configured for receiving a plurality of electronic systems thereon, the rack having an inlet manifold and an outlet manifold;
• a plurality of electronic systems mounted on the rack in a horizontal array, each electronic system comprising:
• a sealed case defining a liquid tight interior space, a fluid inlet in fluid communication with the interior space and fluidly connected to the inlet manifold, a fluid outlet in fluid communication with the interior space and fluidly connected to the outlet manifold, and a plurality of heat generating electronic devices disposed within the interior space;
• a single-phase, dielectric cooling liquid disposed within the interior space and submerging the heat generating electronic devices;
• a heat exchanger mounted on the rack, the heat exchanger including an inlet in fluid communication with the outlet manifold and an outlet in fluid communication with the inlet manifold;
• a pump fluidly connected to the heat exchanger for pumping the single-phase, dielectric cooling liquid through the heat exchanger;
• and
• a liquid cooling system in heat exchange relationship with the heat exchanger.