Process Control
HP Control: Total- or partial-draw configuration
Ever wonder why some main fractionators are designed with partial-draw trays, whereas others are total draws? A typical partial-draw with pumparound configuration is shown in Fig. 1. Liquid is taken f..
Implementing a suitable safety instrumented system—Part 1
The "analysis phase" is the most important step for engineering and designing a suitable system
HP Control: Process control practice renewal 2010
Allan Kern, Zak Friedman and I have offered numerous ideas to strengthen the practice of process control.1-4 Allan Kern inaugurated a fundamental assessment of process control engineering practice in ..
Looking for improved diesel yields?
Consider using spectro-molecular control to maximize profits
HP Control: Distillation column dual-temperature control—Part 2
Part 1 of this editorial1 has considered a distillation dual temperature control structure and concluded that such strategy is problematic and not likely to work. If you accept that dual-temperature c..
Improving data reconciliation and yield accounting
Here's how the Mathura Refinery's data reconciliation and yield accounting project was implemented
Fieldbus diagnostics: latest advancements optimize plant asset management
New field diagnostic profiles will benefit a wide range of automation stakeholders
HP Control: Distillation column dual-temperature control-Part 1
This editorial takes issue with a claim by Mr. Greg Shinskey that distillation dual-composition control cannot be done effectively by a multivariable predictive controller (MPC), but can be done effec..
Delayed coker heater analysis using an artificial neural network
The model was used to study the effects of the many variables that affect coke formation
Implement a constrained optimal control in a conventional level controller - Part 2
Novel tuning method enables a conventional PI controller to explicitly handle the three important operational constraints of a liquid level loop in an optimal manner as well as copes with a broad range of level control from tight to averaging control
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