OPT FOR SECURITY AND PERFORMANCE
Improve the security and performance of your plant with alarm management, performance supervision, asset supervision, web-based data visualisation, optimisation, advanced control, and tuning with the new TaiJi tool.
Rethink your working methods and obtain immediate results thanks to our services, trainings, and consulting expertise. Manage changes intelligently with our proven solutions.
certified service providerJanuary 2009
In this issue
Trick
When Do We Need Cascade Control?
A cascade scheme is needed when a loop can replace a valve so that local and fast disturbances are rejected by an inner loop. For example, if the temperature in a heat exchanger is controlled by a valve changing the coolant flow, the use of a flow control loop instead of a valve will increase performance when a disturbance (e.g. pressure change) occurs in the coolant system. Without cascade control, the temperature of the product in the heat exchanger will change when the coolant system's pressure changes, and the controller will manipulate the valve to compensate… With cascade control, the flow control loop will quickly compensate to maintain the flow, and the temperature will not change.
If a flowmeter is already in place, the cost of adding cascade control consists of the time needed to program the cascade scheme in the DCS, plus the time needed to tune both loops.
Another benefit of cascade control is that all non-linearities related to the coolant flow are embedded in the fast loop and thus have very limited impact on performance.
Do not hesitate to contact us; we can help you do this or train your personnel to do it.
Contact us!
Courses
See our calendar: we offer workshops on control strategies, performance supervision, advanced process control, alarm management, etc.
Articles and Conferences
New articles have been added to our web site:
We are presenting many papers at the annual EXFOR & Annual Meeting in Montreal February 3-4 2009 :
"An Economic Model of a Steam Plant for Decision Making",
Michel Ruel, Tuesday February 3 2009 13:00 h
"Managing Assets Using Modern Tools at White Birch Paper",
Eric Tremblay Papiers White Birch and Michel Ruel Top Control Inc., Tuesday February 3 2009 15:00 h
"Managing Combustibles and Operations using Real Time Data, Economic Values and Contract Clauses using your DCS",
Jean-François Dubé and Michel Ruel, Wednesday February 4 2009, 10:00h
"Best Pratices for Monitoring Your PID Loops-The Key to Optimizing Your Control Assets",
Chris McNabb Matrikon and Michel Ruel Top Control Inc., Wednesday February 4 2009, 13:30h
"What is the Best Way to Control Today's Processes- Why, How and Where Using Advanced Forms of Control Rather than Conventional Control" ,
Panel with many participants, Wednesday February 4 2009, 9:00h
TOP Control Is Certified To Go Offshore
Basic Survival Training (Including HUET)
40-hour course
The Marine Institute
School of Maritime Studies - a full member of the International Association for Sea Survival Training (IASST)
Fisheries and Marine Institute of Memorial University
St. John's, Newfoundland, Canada
To Contact Us
| Lévis Office | +1 (418)834-4321 |
| Green Bay Office | +1 (877)867-6473 |
| Toll free (Canada, USA) | +1 (877)867-6473 |
| info@topcontrol.com |
