Control and Optimize Nonlinear Systems
Andrew C. Burden, Pradeep B. Deshpande, Roberto Z. Tantalean
Turbocharging a contrained model predictive controller (CMPC) with fuzzy logic allows CMPCs to be applied over nonlinear systems
Chemical Engineering Practice
Simulating Aqueous Processes
Joel B. Christian
Simulation that includes aqueous modeling can also account for full vapor/liquid/solid equilibria modeling, including redox chemistry.
Exposing Coriolis Mass Flowmeters' Dirty Little Secrets
James R. Reizner
Coriolis technology appears to be the perfect technology. But, upon closer inspection, a key flaw is revealed - the inability to accurately and consistently measure two-phase flow and aerated liquids.
Audit Your New EHS Software System
Jill Barson Gilbert
A post-implementation audit of the environmental, health and safety management information system evaluates how well the software meets user needs and its value to the organization.
Alarm Management for Regulated Industries
Joseph S. Alford
This article focuses on the regulatory drivers for alarm management, summarizes key practices, and challenges automation vendors to devise new ways to help customers implement more-effective alarm systems.
Improved Heat Transfer Prediction for Air-Cooled Heat Exchangers
Christopher Chu
Using this technique to determine the effective plume-chimney height for an exchanger operating in natural circulation mode.
Cost Management in Heat-Transfer-Fluid Systems
Conrad E. Gamble, P.E.
By taking ownership of fluid-related decisions for the entire life of the project, from design through dismantling, users can secure the best and lowest-cost approach in process heating and cooling.
Computational Fluid Dynamics - Power to the People
Suzanne Shelley
Today's CFD Programs are more powerful and easier to use than ever, thanks to improved mesh-generation strategies, computational methodologies, user interfaces and enhanced graphics capabilities. Cover photo courtesy of Acusim and Intelligent Light.
Is Your Cold Lime Softener Effective?
Loraine Huchler
If your plant's utility system is experiencing problems, the culprit may be the clarifier. Understanding how to diagnose and correct off-spec clarifier operation will allow downstream units to function more efficiently and reliably.
Exploring Instrumentation Alternatives
Robert Baker
Salvaged, remanufactured, refurbished or new-surplus equipment may be a cost-effective option. Here's how to recognize when such devices may no longer meet safety or regulatory requirements.
Process Simulation from the Ground Up
David Hill
Today's process simulators produce graphical, data-filled and detailed results that can improve the effectiveness of the engineers who use them.
Cooling Towers, Part 2: Operating, Monitoring and Maintaining
Loraine Huchler
Process plants often use evaporative cooling towers to reject heat to the atmosphere.This article explains the basics of cooling tower operation.
Use Oxygen to Improve Combustion and Oxidation
Nancy C. Easterbrook, Reed J. Hendershot, Timothy D. Lebrecht
Substituting oxygen for air is often a low-cost, easy-to-implement option that can reduce capital costs, lower emissions, and improve process flexibility and reliability.
Developing Crystallization Processes
Christianto Wibowo
With solid-liquid equilibrium as its foundation, this systematic approach makes it easy to identify operating regions and theoretical yield to maximize the desired product.
Reduce Your Compressed Air Costs
Bill Scales, Ron Marshall
Annual operating expenses for compressed air systems can exceed the equipment’s purchase price. Follow these seven steps to implement efficiency measures that yield cost reductions.
Co-Inventors: Who Owns the Patent Rights?
M. Henry Heines
A joint invention arises from the combined efforts of two or more inventors. Once a patent is granted, however, the inventors do not necessarily share in the rewards.
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