Tag Archives | ISA mentor program

Webinar-Recording-Model-Predictive-Controllers-for-Cost-Optimization

Webinar Recording: Model-Predictive Controllers for Cost Optimization

Having two small model-predictive controllers (MPCs) available as a standard option in a distributed control system (DCS) shows much better performance than the previous PID for product pH and assay control, reducing off-spec product and raw material use. The MPC effectively deals with a recycle stream and a level override scheme that can change production […]

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Webinar-Recording-Beginner's-Guide-to-Vacuum-Ramping

Webinar Recording: Beginner’s Guide to Vacuum Ramping

Understanding the fundamental principles and the limitations of process equipment and instrumentation is seen to be essential to developing the proper control system for separation of multiple batch components by vacuum stripping. Danaca Jordan, ISA Mentor Program protégée, presents the results of alternate strategies along with their limitations. A proposed solution is given at the […]

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industrial-applications-thermal-mass-flowmeters

The Good, Bad and Ugly of Thermal Mass Flowmeters

Thermal mass flowmeters can be a relatively inexpensive flowmeter that can handle extremely small flows (e.g., inline 1/16-inch meters) and large flows (e.g., multipoint insertion type in 60 inch ducts). Thermal flowmeters introduce heat into the flow stream and measure how much heat is absorbed using one or more temperature sensors. However, the meter requires […]

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near-integrating-process-response

PID Tuning for Near and True Integrating Processes

The most important loops on vessels and columns typically have a near or true integrating response. A self-regulating process is classified as near integrating if the process time constant is larger than four times the process dead time. The composition, pH, and temperature response of continuous columns tend to have a time constant to dead […]

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engineer-working-at-control-panel-with-pipes

How Do You Measure Control System Performance?

For the automation profession to gain the recognition it deserves, we need to show the impact of our achievements on improving plant performance. This question is from Sridhar Dasani, a recent addition to the ISA Mentor Program, with my answer and additional input from co-founder of the program Hunter Vegas (project engineering manager at Wunderlich-Malec) […]

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