What are single shafts primarily used for in gas turbine systems?

Single shafts in gas turbine systems are primarily used for driving the ship's generator because they provide a direct and efficient means of converting the mechanical energy generated by the turbine into electrical energy. This configuration allows for a simpler design, which is particularly advantageous in marine applications where space and weight considerations are critical.

In this setup, a single shaft connects the gas turbine directly to the generator, enabling the system to produce a reliable power output without the complexities that can arise from multiple shafts. This arrangement also supports smoother operation and easier maintenance since there are fewer moving parts and less potential for misalignment or failure.

While other functions such as driving the main propulsion system or supporting auxiliary systems may utilize single-shaft designs in specific contexts, the primary focus in many gas turbine installations, especially in marine environments, leans toward their role in generating electricity efficiently. This makes the connection between the turbine and the generator the central function of single shafts in these systems.