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Posts Tagged ‘variability management’

For These Economic Times, Squeeze More Out Of Your Process

Posted in Control Strategies, Process Optimization on Tuesday, January 20th, 2009. No comments yet
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One only has to come across reports like the Institute for Supply Management‘s Manufacturing ISM Report On Business to see the slowing global economic conditions. The report notes: Manufacturing activity continued to decline at a rapid rate during the month of December. The decline covers the full breadth of manufacturing industries, as none of the […]

Reducing Drum Level Variability at Different Loads

Posted in Control Strategies, Energy, Variability Management on Monday, January 14th, 2008. One comment so far
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The Automation.com list server has an interesting thread, Three Element Drum Level Control Problem. The question asked was: We have a waste heat recovery boiler that is supplied by exhaust of a 20MW Gas Turbine. We’ve seen that at lower turbine loads (75% and below) the three element drum level controller cannot maintain the drum […]

Emergency Tuning Services Eliminate Boiler Trip Conditions

Posted in Process Optimization, Variability Management on Thursday, June 21st, 2007. No comments yet
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Recently, a North American chemical manufacturer was having problems with their boilers tripping during startup and shutdown sequences. This problem was caused by a wide variation in the process’ demand for steam. This situation caused lost production, which affected the overall plant efficiency. Jim Dunbar, an Emerson variability management consultant was called in to provide […]