June 2007

Special Report: Process/Plant Optimization

Implementing coker advanced process control

This project resulted in about a half-year payout

Friedman, Y. Z., Petrocontrol; Goodhart, S. G., AMT; Haseloff, V., Ruhr Oel

How would you convince someone to install advanced process control (APC) on a coker unit? Such discussions involve not only dollar figures but also one's own conviction. The arguments in favor of APC are known: Use of a complex relationship between controlled variables (CVs) and manipulated variables (MVs) in qualitative and quantitative ways Prediction capability of two to three hours Optimization potential Reduced standard deviation permits operating closer to the limits. To go beyond the numbers we asked one of the coker operators to come up with reasons for installing APC: "APC maximizes throughput in compliance with all given product qualities an

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