Fuel cell power system for a vehicle

A vehicle comprising

• a propulsor operable to provide thrust for the vehicle and to generate a flow of compressed air;
• and
• a fuel cell power system comprising:
• a fuel delivery system comprising a fuel tank for storing hydrogen fuel;
• and
• a fuel cell stack located remotely from the propulsor and in airflow communication with the propulsor to receive the flow of compressed air from the propulsor, the fuel cell stack further in fluid communication with the fuel tank of the fuel delivery system to receive a flow of hydrogen fuel.

A method of powering an aircraft, the aircraft comprising a propulsor having an engine of the aircraft and a fuel cell power system comprising a fuel cell stack, the method comprising:

• operating the propulsor to create a flow of compressed air;
• providing the flow of compressed air to the fuel cell power system;
• providing a flow of hydrogen fuel from a fuel delivery system to one or more engine heat exchangers positioned within the engine;
• providing the flow of hydrogen fuel from the one or more engine heat exchangers to a heat exchanger located upstream of the fuel cell stack;
• and
• exchanging heat between the flow of compressed air and the flow of hydrogen fuel with the heat exchanger.