Heat exchange system in a turbomachine

摘要

The system has two distinct oil circuits (2, 3) for cooling and lubricating an electric starter-generator. The system is configured to set the oil circuits in an oil contact between each other, and set the oil circuits with a fluid e.g. external air, acting a cold source role. A sandwich type air-oil heat exchanger i.e. surface air cooled oil cooler (ACOC) (4), is arranged to cool the oil circuits. The element has a plate (5) integrating each of the oil circuits. The plate has external sides utilized for exchanging the heat between the oil circuits, and equipped with fins. An independent claim is also included for a system for cooling and lubricating a turbomachine.