CCC and DCS

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Thread Starter

bourchak

What advantage is there to use CCC (separately) to control anti-surge (data while be transferred to DCS) or to implement algorithm directly in the DCS (scan time is 250 ms)?
 
J
CCC as well as Triconix and others have algorithms to anticipate surge, thereby starting the control response in the least amount of time. If you have a lower power compressor that is fairly forgiving with respect to surge, you might be able to get by with less control sophistication and speed of response.

John Catch
http://www.inflowinc.com
 
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Radhakrishnan

Distributed Control Systems can be configured for compressor control. However, there are several problems associated with such an implementation:

* Owing to the inherent slow response, the margin of safety has to be increased. This will lead to the recycle/blow down valve opening much earlier than required. The result is wastage of valuable energy.

* For a simple stand-alone compressor, DCS might be okay, though it will be sluggish. However, for a series/parallel network of compressors, a dedicated control system will save millions of dollars, depending on the throughput and the gas compressed.
 
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