Patent ID: 8171860

Claim:
A cooling system for a hydrogen hybrid locomotive including a set of electric traction motors and a hydrogen fuel cell system for providing electric power for driving the traction motors, comprising: a radiator for extracting heat from cooling fluid circulated through the hydrogen fuel cell system; a circulation system comprising: a pump for moving the cooling fluid through the circulation system; a first circulation path including a radiator output valve for controlling a selected amount of the cooling fluid provided by the pump to a cooling fluid inlet of the hydrogen fuel cell system through the radiator; and a second circulation path including a bypass valve for bypassing a selected amount of the cooling fluid provided by the pump around the radiator to the cooling fluid inlet of hydrogen fuel cell system; a fan system for providing air flow across the radiator; and a control system operable to: selectively set a position of the radiator output valve and a position of the bypass valve such that the cooling fluid provided by the first and second circulation paths maintains a selected approximate temperature at the cooling inlet of the hydrogen fuel cell system; and selectively control a speed of the fan to control cooling of the hydrogen fuel cell system.