1. A device comprising heat producing components, said device comprising:a container;
a liquid in said container in which said heat producing components are submerged for extracting heat from said heat producing components;
at least one heat exchanger disposed in the container and having a surface which is in contact with said liquid and which is arranged to extract the heat from the liquid and remove the heat from the device;
a plurality of plate shaped boards disposed in the container in a parallel orientation relative to each other, wherein a surface of each of the plurality of plate shaped boards comprise at least one of the heat producing components disposed thereon; and
a plurality of vertical walls, wherein at least one of the plurality of vertical walls is disposed between the at least one heat exchanger and the plurality of plate shaped boards, wherein said at least one of the plurality of vertical walls is configured to guide and separate an upward circulation from a downward circulation of the liquid within the container, said upward circulation and said downward circulation is caused by convection due to a temperature difference in the liquid, whereby the liquid rises between the heat producing components and descends along the surface of the at least one heat exchanger,
wherein the plurality of plate shaped boards define a first plane and wherein the plurality of vertical walls define a second plane, the first plane being perpendicularly orientated relative to the second plane, and
wherein each of the plurality of plate shaped boards extend from said at least one of the plurality of vertical walls.