Abstract: A computer data center having multiple open computer hardware storage racks. Each rack includes multiple computer hardware components horizontally rack-mounted in a front side of the rack, and a heat exchanging unit vertically mounted to a back side of the rack. A first cooling circuit interconnects the heat exchanging units of at least some of the computer hardware storage racks. At least a first rack and a second rack are arranged back to back in the computer data center, with a first heat exchanger unit of the first rack facing a second heat exchanger unit of the second rack.

Abstract: The invention relates to a structure of a multi-storey computer center building, which is suitable for accommodating a multiplicity of racks, each of which has storage space for computer hardware. The building has a first cooling circuit in order to dissipate heat generated by the computer hardware and the first cooling circuit is designed to supply at least some of the racks with a coolant. The first cooling circuit is also designed to remove the heated coolant from at least some of the racks. And, the racks have heat exchanger devices, which are suitable for transferring the generated heat to the coolant.