Today's large civil Aircrafts use pneumatic power delivered from the engines as energy source to run the Environmental Control System (ECS). The three main tasks of the ECS are to pressurise and ventilate the cabin and to control its temperature. As the ECS is one of the largest power consumer among the non-propulsive systems, it appears clear that toward a More Electrical Aircraft, the electrification of this system will play a key role within the power generation and management and fuel saving, but will also have a big impact on other systems using pneumatic power, for example the Wing Ice Protection System. This paper describes the main changes, benefits and drawbacks linked to the electrification of the ECS: the deletion of engine bleed air system and the increased needs in electrical power, the positive fuel consumption impact on the engine and increased ECS weight.
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