Most aero derivative turbines lube oil systems require?

Aero-derivative turbines are designed for high-performance applications and often utilize separate lube oil systems to ensure optimal operation and reliability. The reason for employing separate lube oil systems in these turbines is primarily based on the need for efficient lubrication under various operational conditions. This approach allows for better control over the oil temperature, pressure, and cleanliness, which are critical for maintaining performance and reducing wear on turbine components.

By using a dedicated lube oil system, the turbine can maintain the right oil properties specific to the demands of the system, ensuring that the lube oil can effectively lubricate bearings and other moving parts even under high loads and speeds. It also facilitates easier maintenance and monitoring, as potential issues can be isolated from other systems.

The other options, while related to lube oil management, do not capture the comprehensive approach that a separate lube oil system entails. Separate inlet and outlet filter systems, for example, could be part of a lube oil system but do not emphasize the need for that system to be completely independent of others for optimal functionality. Similarly, multiple pumps and separate tanks/coolers may be specific features within a lube oil system, but they do not reflect the overarching requirement for complete separation that distinct systems provide.