DOC AIRBUS | AMM A320FECU COOLING SYSTEM - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
The Electronic Control Unit (ECU) is air cooled. This airflow maintains ECU internal temperatures within maximum limits. A flushed air scoop located on the inlet outer barrel supplies air through a duct to the ECU. The cooling air is exhausted from the ECU into the fan compartment.
** ON A/C NOT FOR ALL The Electronic Control Unit (ECU) is air cooled. This airflow maintains ECU internal temperatures within maximum limits. A flushed air scoop located on the inlet outer barrel supplies air through a duct to the ECU. The cooling air is exhausted from the ECU into the fan compartment.
2. Description
The air entering the ECU flows across the cooling fins of the heat sink.
For normal operation, ambient temperature less than 100 deg.F (38 deg.C) or mach number greater than 0.4, this cooling system is adequate. Then the cooling requirement is 50 g/s (1.765 oz/s), which is taken by a scoop on the outside surface of the air intake cowl.
The air entering the ECU flows across the cooling fins of the heat sink.
For normal operation, ambient temperature less than 100 deg.F (38 deg.C) or mach number greater than 0.4, this cooling system is adequate. Then the cooling requirement is 50 g/s (1.765 oz/s), which is taken by a scoop on the outside surface of the air intake cowl.