During ground operation, how does the heat exchanger pack function?

The heat exchanger pack functions primarily by using a fan assembly to force ambient air through it. This process involves drawing in outside air and pushing it over the heat exchanger elements, allowing the heat from the fluid inside the pack to be dissipated into the surrounding environment. Consequently, the fluids used in the system, which may be either cooling or heating, can effectively exchange their heat, maintaining optimal operational temperatures.

This method is crucial during ground operations, as it ensures the heat exchanger can function efficiently even when the aircraft might not be moving at high speeds, which would naturally provide additional airflow. Proper heat management is vital for the performance and safety of the aircraft, particularly in ground conditions where other cooling methods may not be as effective.