What is the purpose of air compressors in power plants?

Air compressors play a crucial role in power plants primarily by supplying compressed air for instrumentation and control devices. These devices often require a reliable source of compressed air to function properly. For example, pneumatic controllers, actuators, and various measurement instruments depend on this compressed air to operate accurately and efficiently. The air can also be used for cleaning purposes in sensitive areas of the plant and for providing a source of power for some mechanical devices.

Having a dedicated air supply ensures that the power plant's operational reliability is maintained, as many control systems rely on pneumatic signals to monitor and adjust processes. The reliability of these systems is vital to maintaining efficiency and safety within the power generation process.

While there are other systems in the power plant, such as those for cooling engine components, circulating fuel for combustion, or reducing exhaust emissions, these do not primarily rely on air compressors to fulfill their functions. Therefore, the role of the compressor in supplying compressed air for control and instrumentation highlights its essential function in ensuring the plant operates smoothly and safely.