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Tag: hot air
Brexit hot air causes climate problems
2016-06-29 11:45:00| Climate Ark Climate Change & Global Warming Newsfeed
Climate News Network: The shock waves felt round the world at the UKs decision in a referendum to leave the European Union will have unexpected consequences for some major projects linked to climate change. Plans for four giant nuclear reactors to be built in England by the French are almost certain to be scrapped because opposition among trade unions in France has hardened since last weeks vote. A second major project - a third runway at Heathrow, Londons busiest airport - was due to be given the go-ahead on...
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A view of Paris from a hot air balloon: putting pollution on the climate agenda
2015-12-10 12:57:00| Climate Ark Climate Change & Global Warming Newsfeed
Guardian: The air quality is officially good, 400ft above Paris in a balloon at rush hour. From that height you can see the ring road and many of the citys 37 bridges blocked with traffic, the commuting trains coming in, and on the first cold day of winter water vapour rising from several power stations as thousands of central heating systems fire up . A yellowish haze has formed on the horizon as air pressure builds, but the pollution from Pariss transport, construction sites and power stations is...
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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hot
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Video: Output Tracking for the Hot Air Temperature Controller
2015-09-18 19:34:00| Chemical Processing
This video examines output tracking for the hot air temperature controller. The hot air temperature controller outputs to a summer whose output is the fresh air damper opening. 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: Controls for Hot Air Dampers in Alternate Control Configuration
2015-09-17 20:57:00| Chemical Processing
This video proposes controls for the hot air pressure and the bag house inlet temperature. Interaction is a major concern. Opening either hot air damper decreases the hot air pressure. Opening the hot air damper to bag house inlet increases the bag house inlet temperature. Opening the hot air damper to scrubber duct inlet alters the distribution of hot air so as to decrease the bag house inlet temperature. 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/