Innogy CHP plant chooses 3051S Series transmitters

After on-site comparative trials, the Innogy CHP plant at Grimsby chose the Rosemount 3051S differential pressure transmitters for performance, demonstrating low drift in all environmental conditions

Innogy Cogen operate a gas turbine CHP plant at Huntsman Tioxide in Grimsby, 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 were recommended the new Rosemount 3051S "Ultra" differential pressure transmitter; using the all welded, hermetically sealed SuperModule 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 previously installed transmitter units.

The results justified the Rosemount specification claims, and provided stable measurements based on a few millibars of differential pressure, in varied environmental conditions.

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