Multi-stage radial compressor unit comprising gas removal during a compressor stage

A radial compressor unit for the compression of gas, comprising:

• a plurality of compressor stages (11, 12, 13), each compressor stage (11, 12, 13) having:
• an internal wall (32),
• an impeller (18) with rotor blades (23), and
• a flow channel (24) arranged, with respect to the flow direction of the gas to be compressed, downstream of the impeller (18), the flow channel (24) having a diffuser section (25), a deflection section (26) and a recirculation section (27) with multiple guide blades (28),
• wherein compressed gas, as cooling gas, is removed from at least one of the plurality of compressor stages (11) and conveyed for the cooling of a component to be cooled in the direction of the component to be cooled, wherein the cooling gas is removed adjacent to an intermediate wall (32) of the at least one of the plurality of compressor stages (11) and is removable from the deflection section (26) and/or the recirculation section (27) of the flow channel (24).