Patent ID: 8568111

Claim:
A system comprising: a fuel cell having a cathode; a fluid flow machine comprising: a housing with a compression chamber inside of the housing; a connecting piece for receiving a working fluid on an intake side of the compression chamber; a shaft that is held in the housing by radial and axial bearings; at least one impeller mounted on said shaft and configured in the compression chamber inside of the housing; and a cooling arrangement for at least one of the radial and axial bearings, comprising: a cooling fluid transport device that comprises a revolving part of the axial bearing; cooling channels arranged in the housing; and a suction connection of said revolving part leads to the intake side of the impeller; wherein the radial and axial bearings are located outside of the compression chamber, wherein the revolving part comprises a disk that is arranged on the shaft in a torque-proof manner, wherein the disk comprises radial bores and axial bores connected to the radial bores for transporting the cooling fluid, and wherein the cooling channels receive the cooling fluid from the disk of the axial bearing and provide the cooling fluid as an oxidant to the cathode of the fuel cell.