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 air flow maintains ECU internal temperatures within max limits. An air scoop is located on the inlet outer barrel. It is flush with the barrel and 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 air flow maintains ECU internal temperatures within max limits. An air scoop is located on the inlet outer barrel. It is flush with the barrel and supplies air through a duct to the ECU. The cooling air is exhausted from the ECU into the fan compartment.
ECU Cooling System2. 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.