What is the function of heat exchangers in an air-cycle cooling system?

The function of heat exchangers in an air-cycle cooling system is to transfer heat away from the air. In such systems, heat exchangers play a crucial role in maintaining a comfortable cabin environment by effectively managing the temperature of the air being circulated.

When air enters the system and is compressed, it becomes hot due to the increase in pressure. The heat exchanger is then responsible for removing this excess heat from the compressed air before it enters the cabin. This cooling is essential for providing a pleasant atmosphere for passengers and crew, ensuring that the air circulating within the cabin is at a suitable temperature.

In an air-cycle cooling system, the efficiency of the heat exchange process directly influences the system's overall performance. By transferring heat away from the air, the heat exchangers help to lower the temperature of the circulated air, thereby enhancing passenger comfort during the flight.

Other functions mentioned in the choices, such as compressing air for pressurization or regulating airflow in the cabin, do not align with the specific role of heat exchangers. Similarly, enhancing combustion processes does not pertain to the operation of heat exchangers, which are focused solely on thermal management rather than combustion-related functions.