Triangular cycling occurs in a pressure loop
Install a flow meter in the recycle, cascade the flow set point with a pressure control loop. With proper tuning, the valve characteristics are lost in the flow control loop, which should be tuned fast with PI.
Who's working at your plant?
The backgrounds of intruders may be a mystery, but the backgrounds of people regularly on your site shouldn't be. How carefully does your company check the references of people at your plant?
The Bioproducts Crescendo Builds
Market forecasts for bioproducts are upbeat. One even predicts that industrial biotechnology will be a $160 billion global business by 2010. Industrial biotechnology first took off in the early 1980s; what gives today's activity a buzz of excitement is the repeat of something else from that era: high energy prices.
Hazmat Oversight Demands Attention
For the most part, industry and government have worked well together to develop and implement assessments and tightened security measures. Late last year, however, a pair of situations arose that underscore some procedural differences between the two