This thesis work was carried out in collaboration with Politecnico di Torino at the Collins Aerospace plant in Luserna San Giovanni which is specialized in Actuation and Environmental Control Systems. Environmental Control System (ECS) or Air management system plays a key role in aircraft performance. It provides air supply, pressurization, thermal control, and cabin dehumidifying for the crew and passengers. The system must always ensure the best performance, with a very high standard of reliability. To guarantee these demands, replacement or design modification of sub-components is sometimes necessary. For this purpose experiments are carried out for performance prediction/assessment, which is costly and time-consuming.