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  • Succeed at Simulation

    The “Seven rules for successful simulation” need to be revisited and revised because of advancements in computers. Simulations that once took weeks to compute an answer now take mere hours.

    Cliff Knight, KnightHawk Engineering
  • What is taking so long?

    Despite its 30-plus-year history, advanced process control (APC) applications remain few and far between, but it doesn’t need to be that way. Dave Harrold, cofounder of the AFAB Group, reports.

  • Control valves for slurry service

    In this installment of Ask The Experts, noted process control authority and CONTROL Columnist Béla Lipták and his cadre of automation experts answer a reader’s question regarding control valves for slurry services.

  • Flame Modeling Provides Matchless Results

    A computer simulation helps solve a refinery combustion problem. Finding ways to limit NOx from fired heaters, especially under stringent environmental regulations, has become a major concern for the petroleum refining industry. Complying with new stricter regulations, a Texas refinery upgraded the burners in one of its large cylindrical furnaces.

    Roberto Ruiz, Ph.D., John Zink Co.
  • 10 tips for diagnosing control valve problems

    To make the most of diagnostic equipment used in chemical processing, technicians must stretch their knowledge of control valves and related diagnostic equipment that keeps tabs on valve health and safety.

    David W. Douglas
  • Understand and Control Hot Vapor Bypass

    Contributing Editor Andrew Sloley says pressure control technique works well if implemented properly, in this month's Plant InSites column.

    Andrew Sloley, contributing editor
  • Distillation control and optimization, Part 3

    Control's Béla Lipták continues his series on control of distillation processes, this time focusing on managing reboiler flow, temperature, feed rate, loading and reflux for economy, stability and safety.

    Béla Lipták, PE, CONTROL Columnist
  • Rethink experiment design

    The traditional approach to experimentation, often referred to as the “scientific method,” requires changing only one factor at a time (OFAT), but this method only allows one to see things one dimension at a time. By varying factors only at two levels each, but simultaneously rather than one at a time, experimenters can uncover important interactions.

    Mark J. Anderson and Patrick J. Whitcomb, Stat-Ease
  • Ensure proper silo design

    Designing equipment for solids is not an exact science. The flows of gases and liquids are generally better understood than those of solids. Most production problems arise from flaws in the design. This article presents questions you can ask yourself to ensure reliable flow in your silo.

    Joseph Marinelli, Solids Handling Technologies, Inc.
  • Process analysis gains greater online role

    Faster. Smaller. Smarter. Modular. All express the future of process analytics. And un-stoppable describes the ongoing migration of process analytical instruments to continuous, online, field-mounted use at chemical plants.

    C. Kenna Amos, contributing editor
  • HMIs evolve in process control

    New HMI technology is putting a whole new (inter)face on how operators view control systems information, while at the same time driving human error out of systems and improving safe work practices.

    Ian Nimmo, president, User Centered Design Services LLC
  • Better Design Is No Pipe Dream

    The benefits of using pipeline simulation tools at the piping and instrumentation diagram (P&ID) level, rather than running simulations just on the process flow diagram, can often be overlooked.

    Mike Spear, editor at large
  • Wireless wins wider role

    Wireless is poised for a big breakthrough in plant operations because of its ease of use, safety and potential for energy savings.

    C. Kenna Amos, contributing editor
  • Distillation control and optimization, Part 1

    Control columnist Bela Liptak describes the distillation process and PID-based controls, reviews optimization strategies, and shows how advanced controls can cut operating costs of distillation.

    Béla Lipták, PE, Control Columnist
  • Evaluate reactivity with limited resources

    The initial critical steps of reactivity risk reduction need not be expensive, time consuming and require extensive expertise.

    W. J. Rogers, C. Wei and M. S. Mannan, Mary Kay O’Connor Process Safety Center
  • Dig Deeper to Find More Capacity

    Pipeline simulation software can uncover hidden causes of capacity bottlenecks.

    Todd J. Willman, EPCON International, Reuben Gates, Shell Chemical LP, and Mark Haboian, Eastman Kodak Co.
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