Category: Batch Capacity Batch Control Batch Cycle Time Batch Endpoint Batch Yield Integrating Process PID Tuning Tips
Submitted by Greg McMillan on Wed, 07/22/2015 - 18:02
Batch process control can seem like another world compared to continuous process control. In batch operations, process conditions are constantly changing and control loops are going in and out of service. PID control may take a back seat to sequential scheduling of manipulated flows.
Submitted by Greg McMillan on Thu, 08/28/2014 - 19:26
Batch processes pose particular challenges for closed-loop control and optimization due to inherent process nonlinearity and non-self-regulation. At the same time there is a greater potential for increasing capacity in batch than in continuous processes. Solutions need to address the interrelationship between yield, capacity, quality, and repeatability.
Submitted by Greg McMillan on Fri, 08/15/2014 - 16:07
The highest value added products use batch operations. Batches can take days to complete and be worth millions of dollars. In many cases bad batches cannot be fixed downstream. Bad batches must be avoided. There are many techniques for making batches more repeatable and faster by better monitoring and control.
Category: Batch Cycle Time Integrated Absolute Error Overshoot Peak Error Rise Time Startup Tips Undershoot
Submitted by Greg McMillan on Fri, 04/19/2013 - 16:16
A PID tuned for maximum disturbance rejection in a composition, temperature, and gas pressure loop will exhibit excessive overshoot in the setpoint response unless one of several PID features is used. The options are relatively easy to configure. Here we discuss performance metrics and test results.
Submitted by Greg McMillan on Sat, 09/15/2012 - 13:47
Batch processing is a critical part of many high value added biological and chemical processes. Batch processes are capable of higher conversions than continuous processes because there is no discharge flow until the batch is deemed complete.