Patent ID: 8839641

Claim:
An environmental control system for an aircraft, comprising: a bleed air source; at least a first air cycle machine that has an air cycle inlet connected to the bleed air source and is operable to provide conditioned air to an air cycle outlet; at least a first flow control system that has a flow control inlet connected to the bleed air source and is operable to provide cooled air to a flow control outlet, wherein the first flow control system includes a heat exchanger that includes a primary stage and a secondary stage; a first connector duct that connects a primary stage outlet of the primary stage of the heat exchanger of the first flow control system to a secondary stage inlet of the secondary stage of the heat exchanger of the first flow control system without junctions or valves; and a mixing manifold that receives conditioned air from the air cycle machine and cooled air from the flow control system and is operable to selectively provide the cooled air, the conditioned air, or mixed air to the aircraft, wherein the mixing manifold produces the mixed air by mixing the cooled air and the conditioned air.