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Video: Integral Tracking for the Hot Air Dampers
2015-09-21 22:09:00| Chemical Processing
Should a hot air damper be driven either fully open or fully closed, integral tracking must be activated in either the hot air pressure controller or the bag house inlet temperature controller. The issues are similar to those for output tracking presented in a previous video. To access the entire video series from Cecil Smith, visit our video page. Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/
Video: Integral Tracking for the Hot Air Temperature Controller
2015-09-21 22:05:00| Chemical Processing
For a PID controller to perform as expected, changes in the controller output must lead to changes in the opening of one or more final control elements, which must affect the measured variable for the PID controller. Driving a final control element to either limit disrupts this sequence. This requires integral tracking, not output tracking. If the final control element has been driven fully open, control actions to increase the opening cannot be implemented, but control actions to decrease the opening can be. The opposite is true if the final control element is driven fully closed. To access the entire video series from Cecil Smith, visit our video page. Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/
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Video: Output Tracking for the Hot Air Dampers
2015-09-21 22:02:00| Chemical Processing
Previous videos examined output tracking for the scrubber duct inlet temperature controller and the hot air temperature controller. This video examines output tracking for the hot air pressure controller and the bag house inlet temperature controller. To access the entire video series from Cecil Smith, visit our video page. Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/
Partnership Guides Trash Win-Win for Air Force Base and Maryland County
2015-09-21 20:04:47| Waste Age
The Air Force Community Partnership Program is designed to help bases and their neighbors share services and save money. read more
Recirculated Air Compliance Path posed for ASHRAE IAQ standard.
2015-09-21 14:31:14| Industrial Newsroom - All News for Today
Optional credit for improving filtration combined with ensuring sufficient air flow through filters is being proposed for ANSI/ASHRAE Standard 62.22013, Ventilation and Acceptable Indoor Air Quality in Residential Buildings. This standard defines roles of and minimum requirements for mechanical and natural ventilation systems and building envelope to provide acceptable IAQ quality in residential buildings. Currently, there are 8 proposed addenda to Standard 62.22013 open for public comment.
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