Abstract: A method of controlling an outlet temperature of a heat exchanger of an aircraft includes operating an air cycle machine at a first operating speed. The air cycle machine is operatively coupled to an air cycle machine bypass valve at a first position. The air cycle machine is fluidly connected to a first heat exchanger disposed adjacent to a second heat exchanger. In response to a second heat exchanger outlet temperature less than a second heat exchanger outlet temperature threshold while the aircraft is operating at an altitude less than an altitude threshold, the method moves the air cycle bypass valve from the first position toward a second position.

Abstract: A method of controlling an outlet temperature of a heat exchanger of an aircraft includes operating an air cycle machine at a first operating speed. The air cycle machine is operatively coupled to an air cycle machine bypass valve at a first position. The air cycle machine is fluidly connected to a first heat exchanger disposed adjacent to a second heat exchanger. In response to a second heat exchanger outlet temperature less than a second heat exchanger outlet temperature threshold while the aircraft is operating at an altitude less than an altitude threshold, the method moves the air cycle bypass valve from the first position toward a second position.

Abstract: A thermal pneumatic deicing system for deicing a RAM air heat exchanger includes an environmental control system (ECS) including a RAM air heat exchanger and an outlet, an electronics housing including a plurality of electronic components, and a duct fluidically connecting the RAM air heat exchanger and the electronics housing. The duct includes a valve. A controller is operatively connected to the valve. The controller is configured and disposed to selectively fluidically connect the RAM air heat exchanger and the electronics housing to facilitate deicing of the heat exchanger.

Abstract: A thermal pneumatic deicing system for deicing a RAM air heat exchanger includes an environmental control system (ECS) including a RAM air heat exchanger and an outlet, an electronics housing including a plurality of electronic components, and a duct fluidically connecting the RAM air heat exchanger and the electronics housing. The duct includes a valve. A controller is operatively connected to the valve. The controller is configured and disposed to selectively fluidically connect the RAM air heat exchanger and the electronics housing to facilitate deicing of the heat exchanger.