How are lubrication problems reduced in microturbines?

The correct answer highlights the significance of foil bearings in addressing lubrication issues within microturbines. Foil bearings are constructed from flexible materials that provide a hydrodynamic lubrication film between moving surfaces. This form of bearing works effectively under conditions typical of microturbine operation, allowing the rotation of components without the need for traditional liquid lubricants.

Using foil bearings largely reduces the dependency on liquid lubricants, which can lead to potential leakage, lubrication failures, and increased maintenance needs. This technology also allows for lower friction and wear, resulting in enhanced efficiency and reliability of the microturbine, especially at high speeds or in low-lubrication environments.

Other methods to mitigate lubrication issues, such as using liquid lubricants, may not offer the same level of reliability and efficiency as foil bearings in the context of microturbines. Additionally, minimizing moving parts and improving air cooling systems can assist in the overall performance but do not specifically target lubrication problems in the same direct manner as foil bearings.