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Online Estimation of the Condensate Load in Dryer Cylinders During Section Starting

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2 Author(s)
Ramirez, G. ; Dept. of Electr. Eng., Univ. of Concepcion, Concepcion, Chile ; Valenzuela, M.A.

A “condensate load” (condensate in % of a totally full cylinder) over 1% accumulated inside the dryer cylinders of a paper machine is likely to produce a drive overload, eventually increasing the acceleration time or even producing an overload trip. This paper proposes and evaluates a confident online condensate estimation algorithm that gives updated information at preset speeds and when the transition to the rimming stage is detected. The experimental evaluation performed on a 500-mm-diameter cylinder, with condensate load between 0.5% and 25%, confirmed the ability of the algorithm to give accurate estimations within 0.5% intervals of condensate loads. The developed algorithm is a useful tool for the operators, allowing them to take the appropriate decisions according to the severity of the condensate accumulation detected.

Published in:

Industry Applications, IEEE Transactions on  (Volume:48 ,  Issue: 5 )

Date of Publication:

Sept.-Oct. 2012

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