Patent ID: 11949132
Assignee: ROBERT BOSCH GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A fuel cell system (1) comprising:
a turbomachine (15),
a turbine (11),
an air compressor (5) which is used to compress an air mass flow (4) that is fed to at least one fuel cell (3),
a cooling air path (19), via which a cooling air mass flow (7) is branched off from a compressed air mass flow (6), and
a demand-dependent controller (20) for the cooling air mass flow (7), wherein a temperature of cooling air at a cooling air outlet (24) of the turbomachine (15) is a controlled variable of the controller (20), wherein a fluidic resistor (22) in the cooling air path (19) is a manipulated variable of the controller (20), wherein a flow resistance of the fluidic resistor (22) changes as a function of the temperature of the cooling air at the cooling air outlet (24) of the turbomachine (15) to meter the cooling air mass flow (7) in a demand-dependent manner, wherein the cooling air path (19) has arranged in it a bimetallic matrix (25), which is used to form the manipulated variable of the controller (20) and the bimetallic matrix (25) comprises bimetals which are arranged adjacent to one another and have different coefficients of thermal expansion, and wherein the bimetallic matrix (25) is supplied the cooling air at the cooling air outlet (24) of the turbomachine (15).