Systems and methods for immersion-cooled datacenters

A liquid-submersible thermal management system comprising:

• an outer shell having a longitudinal axis and an opening at a first end of the longitudinal axis;
• an inner shell positioned in the interior volume of the outer shell, the inner shell defining a cooling chamber;
• a heat-generating component located in the cooling chamber;
• a working fluid positioned in the cooling chamber and at least partially surrounding the heat-generating component, the working fluid configured to receive heat from the heat-generating component;
• a spine oriented in a direction of the longitudinal axis, the spine including a working fluid conduit configured to flow a liquid phase of the working fluid upward in the cooling chamber;
• and
• a nozzle positioned on the working fluid conduit to spray droplets of the liquid phase of the working fluid toward the heat-generating components.

A liquid-submersible thermal management system comprising:

• an outer shell having a longitudinal axis and an opening at a first end of the longitudinal axis;
• an inner shell positioned in an interior volume of the outer shell, the inner shell defining an immersion chamber;
• a heat-generating component located in the immersion chamber;
• and
• a liquid working fluid positioned in the immersion chamber and completely filling the immersion chamber to surround the heat-generating component, the working fluid configured to receive heat from the heat-generating component.