October 2007

Special Report: Process Control and Information Systems

Probabilistic alarm management

A procedure using Markov chains provides insights based on HAZOP report information

Larraz, R., University of La Laguna

Given the impact of alarm management in process units, alarm system design has a paramount role and deserves major effort from the plant staff and process licensors. An alarm system should direct the operator's attention toward plant conditions requiring timely assessment or action to help the operator to: Prevent plant trips and, hence, improve availability Provide more economical production by avoiding off-spec conditions Prevent environmental or safety incidents. There is not too much room for a plant operator to manage the plant during an upset; during normal operation all variables are managed by the control system close to the desired process values defined

Log in to view this article.

Not Yet A Subscriber? Here are Your Options.

1) Start a FREE TRIAL SUBSCRIPTION and gain access to all articles in the current issue of Hydrocarbon Processing magazine.

2) SUBSCRIBE to Hydrocarbon Processing magazine in print or digital format and gain ACCESS to the current issue as well as to 3 articles from the HP archives per month. $409 for an annual subscription*.

3) Start a FULL ACCESS PLAN SUBSCRIPTION and regain ACCESS to this article, the current issue, all past issues in the HP Archive, the HP Process Handbooks, HP Market Data, and more. $1,995 for an annual subscription.  For information about group rates or multi-year terms, contact email Peter Ramsay or call +44 20 3409 2240*.

*Access will be granted the next business day.

Related Articles

From the Archive



{{ error }}
{{ comment.comment.Name }} • {{ comment.timeAgo }}
{{ comment.comment.Text }}