The Principle of Centrifugal Compression: Aero-Dynamics
1. The air reaches the center of the impeller.
2. Air is forced outward by centrifugal force.
3. Diffuser gradually reduces the air velocity.
4. Velocity energy is converted to higher pressure.
One of the most important factor to consider for compressor is the efficiency of the compressor at full load. Air consumption in the plant is however always fluctuating, which is why capacity control system is needed to ensure stable operation of the compressor. This is achieved through the Inlet Guide Vane (IGV) that is installed before the air passage of first compression stage to supply air with constant discharge pressure in accordance with plant air consumption requirements.