What does the secondary exchanger portion of the dual heat exchanger supply air to?

The secondary exchanger segment of the dual heat exchanger system is designed to supply air specifically to the turbine of the turbo cooler. This component plays a crucial role in managing the aircraft's cooling system by ensuring that air is effectively cooled for various systems within the aircraft.

Essentially, the turbo cooler operates by harnessing the cooler air supplied by the secondary exchanger, which helps maintain optimal temperatures for engine and system performance. This is an integral part of the heat management strategy in the Falcon 2000LXS, ensuring that engine components do not overheat under high-performance conditions.

The other options, such as the cabin air distribution system and the backup cabin heater, are managed by different systems within the aircraft. The cabin air distribution system typically relies on primary heat exchangers and cabin pressurization methods, while backup heating systems would engage with dedicated heating elements rather than the secondary exchanger designed for the turbo cooler. Thus, the role of the secondary exchanger is specific and critical in directing airflow to the turbo cooler's turbine for effective temperature regulation.