Zeroavia, Inc.

Stephen Lawes

Bob Lee Mackey

Ritish Tejpal

Gareth Coates

A cooling system for a fuel-cell system onboard a vehicle such as an aircraft in one embodiment employs the latent heat of evaporation of a two-phase coolant to reduce mass and parasitic power requirements of the cooling system. In another embodiment the cooling system has a primary ambient air heat exchanger coolant loop for cooling the fuel-cell system, and a secondary coolant loop comprising a fluid circuit configured to circulate a coolant in thermal contact with a phase-change material (PCM) in thermal contact with the fuel-cell to absorb heat from the fuel-cell. The secondary coolant loop includes a heat pump for cooling the PCM.

Fuel cell thermal energy storage in phase-change material

An integrated hydrogen-electric engine includes a hydrogen fuel-cell; a hydrogen fuel source; an electric motor assembly disposed in electrical communication with the fuel-cell; an air compressor system configured to be driven by the motor assembly, and a cooling system having a heat exchanger radiator in a duct of the cooling system, and configured to direct an air stream including an air stream from the air compressor through the radiator, wherein an exhaust stream from a cathode side of the fuel-cell is fed via a flow control nozzle into the air stream in the cooling duct downstream of the radiator.

Hydrogen recirculation venturi array for optimized H2 utilization

A method for jump-starting a hydrogen fuel cell-powered aircraft is disclosed. The method accesses a fuel cell stack containing latent oxygen therein. Accesses a hydrogen fuel source and provides hydrogen from the hydrogen fuel source into the fuel cell stack causing the hydrogen to mix with the latent oxygen in the fuel cell stack and generate a voltage. The voltage is then provided to a component of the hydrogen fuel cell-powered aircraft such that additional oxygen is introduced to the fuel stack.

Growing community of inventors

Cirencester, United Kingdom

Stephen Lawes