HYDROGEN-COOLED ENVIRONMENTAL CONTROL SYSTEM

A hydrogen-cooled environmental control system, ECS, is provided and includes a pressurizing system (210) including an electric compressor (211) that compresses RAM air into pressurized warm RAM air for a cabin (111) and a heat exchanger (220) in which the pressurized warm RAM air is selectively cooled by hydrogen flown from a hydrogen fuel tank (230) toward a combustor (240) in accordance with conditions of the pressurized warm RAM air prior to the pressurized warm RAM air reaching the cabin (111).