PID regulation with FB41 for management of a compressor station

 Dear User,

hello,

I have to do  a management of a compressor station so the compressed air supply is provided by the air compressor station of the factory, composed of five compressors, At 8 bar pressure. i have one trasducteur for pressure 4-20, and i want  to do PID regulation with FB41 how can i do it .

thank u for helping me in advance

norimane

 pressure regulation should be done at the compressor level by using IGV(Inlet Guide Vane) and Blow off valve.For huge air compressors , normally an override control structure(FB41 as PID in this structure) ensures both safe distance from surge limit and the pressure regulation.

This is a decision by a process engineer to put a air storage after common header of compressors to provide  a reserve,damping transient demands from plant and a mechanical over pressure safety device (PSV) will provide the same concept. 

If you want to have a PID solution,ask your process designer for Piping and instrumentation diagram and brief control philosophy.

I hope it helps,

hdhosseini