Succeed at Dynamic Modeling of Batch Reactors and Batch Distillation
This paper reviews the basic techniques for dynamic modeling of these two key operations. It covers considerations related to heat transfer, reaction chemistry, mass balances and the control system. It also discusses equipment configurations, performance characteristics and operational constraints.
Tracing the accuracy of calibration gases
Calibrating your instruments using specialty gas will only yield results as accurate as your gas mixture. This three-page white paper discusses analytic traceability and how it relates to gas mixture accuracy.
Understand Heat-Transfer-Fluid Maximum Temperature Rating
Manufacturers of heat transfer fluids assign a maximum temperature rating to each fluid. This rating must be considered to ensure the safe and efficient operation of the fluid. This paper explains the basis of the rating, how fluids degrade, and how the temperature profile in a heat transfer system affects fluid performance and life.
Understand Pump Lifecycle Costs
This 22-page paper from the Dept. of Energy, Hydraulic Institute and Europump explains the importance of understanding the total costs of ownership to achieve savings in energy, and operational and maintenance costs. It discusses what lifecycle cost is, what should be considered in a lifecycle cost analysis, and the role of proper pump system design.
Understanding Regulated Health and Safety Standards--Part 1
This paper provides the viewpoint of the American Conference of Governmental Industrial Hygienists (ACGIH), a private not-for-profit, non-governmental corporation open to all industrial hygienists or other occupational health and safety professionals. The authors have the opinion that there are misunderstandings about the use of regulated health and safety standards.
In part one of this article, they provide some information on how regulations are formed and advice on using these values to conduct business. Employers and employees need this fundamental understanding to make informed health and safety decisions. This information is also useful for guiding public decisions about everyday toxic exposures.
What is a Bearing Isolator?
A bearing isolator is a non-contact, non-wearing, permenant bearing protection device. Read about they can be effectively used in your plant.
Why Process Safety Management Audits Fail
Most companies have completed at least three process safety management(PSM) compliance audits of their covered facilities since the promulgation of the OSHA PSM standard. These companies, however, are not seeing noticeable improvements in their PSM programs. In fact, many companies feel that their PSM programs have become less effective. What has happened and why? Are there any lessons learned from the Enron collapse and its auditing program? What needs to be done?
Ziegler-Nichols Tuning Rules And Limitations
The standard reference for PID tuning seems to be the Ziegler-Nichols tuning rules developed in 1942 on a pneumatic controller. Here is how to tune a controller using these rules.