In the DeltaV discussion forum in the Emerson Exchange 365 community, there is a post, Question about Dynamic reset limit and “Use PV for bkcal” options. What caught my eye was a response by Emerson’s James Beall describing dynamic reset limiting and specifically how it is performed in the DeltaV distributed control system controller.
In manufacturing processes with flowing fluids, control valves are among the most important equipment to keep the process operating smoothly and reliably. For those not experienced in their design and operation, AIChE's CEP magazine has a great article, Evaluate...
The cold section of an ethylene plant is responsible for cooling and purifying the product-grade ethylene, propylene and other bi-products from the cracking furnaces. Cracked gas is cooled in transfer-line exchangers which produce steam from the effluent gas energy. Gas is further cooled with water in the quench column, scrubbed and dried before being compressed in the cracked gas compressor and fed to the cold box.
One of the longstanding events for knowledge exchange among instrumentation and automation professionals and students is the Instrumentation and Automation Symposium for the Process Industries held annually at Texas A&M University. The next one, its 75th...
The history of model predictive control (MPC) dates back to the early 1970s invented at Shell Oil and was known as Dynamic Matrix Control. MPC was designed at that time to solve largescale control challenges. As technology advanced, this technology could be more...
Because they directly touch the process flow, control valves play a significant role in the stability, robustness and variability in the process. One bad-acting control valve can create large problems for safe and reliable operations. At last week's AIChE Spring...
Emerson's James Beall joins our continuing podcast series on 5 Questions for an Emerson Expert. The goal of these podcasts is to share some tidbits on how they got their start in a science, technology, engineering & math (STEM)-based career and more about their...
Moving from the theoretical world of proportional-integral-derivative control to applying it successfully is a hurdle new process control engineers face. Once mastered, the next step might be in applying advanced process controls. Model predictive control, neural...
Having trouble with an oscillating integrating process? Have too much variability in a self-regulated process? Need a refresher about the essentials of Lambda (λ) tuning? Then check out James Beall's workshop at the Jan. 21–23 Texas A&M University 2014...
Last week, Emerson Consultant James Beall was working with a major U.S. plastics facility on the Texas Gulf Coast, helping the firm figure out how it might save some of the money it spends on distillation energy by using Emerson's Smart Process Distillation Column...
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