Emerson's Rosemount 3051S Series Transmitters Chosen for Innogy CHP Plant | Automation.com

Emerson's Rosemount 3051S Series Transmitters Chosen for Innogy CHP Plant

July 242003
Emerson's Rosemount 3051S Series Transmitters Chosen for Innogy CHP Plant
CHANHASSEN, MINN. (July 23, 2003) -- Innogy Cogen operates a gas turbine CHP plant at Huntsman Tioxide in Grimsby, United Kingdom, providing power and steam used in the manufacturing process. Monitoring and control of the blowers used on the intake air flows to the boilers depends on low range DP cells measuring the very small pressure drop across a flow venturi. With
wide temperature fluctuations, particularly between day and night conditions, the zero drift on the DP transmitters installed on the new plant represented a considerable flow - particularly when the intake was not in use.

Innogy consulted Emerson Process Management, and was recommended the new Rosemount 3051S "Ultra" differential pressure transmitter; using the all welded, hermetically sealed SuperModule(TM) provides the ultimate in sensor performance and electronics stability with reliability. The Rosemount specification claim of +/-0.125% of span stability and accuracy, after taking account of all site temperature, humidity and ambient pressure effects, even on spans of only a few millibars, was more than adequate.

Having seen the results of the site ambient conditions on the installed DP cell, Innogy wanted to see the Rosemount units perform in their situation. Two Rosemount 3051S Ultra transmitters were installed on trial, in parallel with the existing units. The results justified the Rosemount specification
claims,and provided stable measurements based on a few millibars of differential pressure, in varied environmental conditions.

Mr Abbott, Project Manager for Innogy on the Grimsby project, commented, "We were experiencing boiler start reliability problems which we had traced to drift in the readings from the boiler air flow transmitters. At low flow the readings from the transmitters were not repeatable and this was preventing the boiler start sequences from completing successfully. Since fitting the Rosemount 3051S DP transmitters (low range) there are no longer false starts due to air-flow reading errors. The boiler plant is now capable of satisfying the design requirements for emergency starting."

Emerson has now supplied further Rosemount 3051S Ultra DP transmitters to replace all the air flow measurement systems on the CHP plant air intakes. Other differential pressure measurement applications in the plant are being reviewed by Innogy, to ensure that the proven stability and accuracy of the Rosemount 3051S is applied to critical applications.

The Rosemount 3051S is supplied also with a 10-year long-term stability guarantee, of better than +/-0.2% of range under as-installed on-plant conditions, plus a 12 year product warranty, giving added confidence that long-term performance will follow the example set by initial evaluation.

About Emerson Process Management

Emerson Process Management(www.emersonprocess.com), an Emerson business, is a leader in helping businesses automate their production, processing and distribution in the chemical, oil and gas, refining, pulp and paper, power,food and beverage, pharmaceutical and other industries. A division of Emerson, Rosemount Inc. (www.emersonprocess.com/rosemount) is a global leader in high-precision pressure, temperature, level, and flow instrumentation. Rosemount's best-in-class technology and expertise play a key role in Emerson's combining of superior products and technology with industry-specific engineering, consulting, project management and maintenance services. Emerson brands include PlantWeb(R), Fisher(R), Micro
Motion(R), Rosemount(R), DeltaV(TM), Ovation(R), and AMS.

About Emerson

St. Louis-based Emerson (www.gotoemerson.com) is a global leader in bringing technology and engineering together to provide innovative solutions to customers in process control; electronics and telecommunications; industrial automation; heating, ventilating and air conditioning; and appliance and tools. Sales in fiscal 2002 were $13.8 billion.
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