Tank system for cooling a liquid using thermal stratification

A tank system for the cooling, storage and withdrawal of a liquid, comprising a tank for the cooling of the liquid and storage of the liquid in a volume along a stratification axis of the volume, such that a thermal stratification of the liquid in the tank can be established at least partially along the stratification axis, wherein the tank can be filled along the stratification axis through a filling device having a filling inlet in an inlet region and can be emptied via an outlet in an outlet region that is situated opposite the inlet region along the stratification axis, wherein, in the tank, to prevent mixing of the liquid in the volume along the stratification axis, the filling device is configured to direct the liquid into at least one flow that runs entirely or partially in a plane perpendicular to the stratification axis and to feed said liquid to the liquid stored in the tank such that the flow flows tangentially with respect to a circular arc that runs in a plane perpendicular to the stratification axis, wherein:

• the filling device, below the filling inlet, comprises a diverting device for diverting the liquid that emerges from the filling inlet into a flow that runs at least partially perpendicular to the stratification axis with a horizontal component, and/or an entirely horizontal flow, wherein the tank can be filled via the filling inlet from above with a component parallel, or entirely parallel, to the orientation of the stratification axis, where, to establish a flow that runs entirely or substantially in a plane perpendicular to the stratification axis, the diverting device has at least one lateral inlet, from which the liquid flows out of the diverting device, whereby the diverting device has one tangential inlet or two tangential inlets.