Aircraft bleed system

An article of manufacture including a non-transitory, tangible computer readable storage medium having instructions stored thereon that, in response to execution by a controller, cause the controller to perform operations comprising:

• determining a status of a wing anti-ice system;
• measuring a temperature of a core compartment via a temperature sensor;
• determining whether an engine operating condition is within an icing envelope;
• selecting a temperature set point for a precooled airflow from a precooler based on the status of the wing anti-ice system and whether the engine operating condition is within the icing envelope;
• and
• modulating a fan airflow from a fan to the precooler to adjust a temperature of the precooled airflow to the temperature set point and to maintain a temperature of an exhaust airflow from the precooler to the core compartment below a threshold temperature.

A method of controlling an aircraft bleed system, comprising:

• monitoring, by a controller, a temperature of a precooled airflow exiting a precooler;
• measuring, by a temperature sensor, a temperature of a core compartment;
• determining, by the controller, a status of a wing anti-ice system of an aircraft, the wing anti-ice system configured to receive the precooled airflow from the precooler;
• determining, by the controller, whether an engine operating condition of the aircraft is within an icing envelope;
• selecting, by the controller, a temperature set point for the precooled airflow based on the status of the wing anti-ice system and whether the aircraft is within the icing envelope;
• and
• modulating, by the controller, a fan airflow from a fan to the precooler to adjust the temperature of the precooled airflow to the temperature set point and to maintain a temperature of an exhaust airflow from the precooler to the core compartment below a threshold temperature.