Estimation of condensate inside dryer cylinders during section shutdown

The presence of condensate inside the dryer cylinders produce a significant increase in the power requirements during starting putting at risk the capacity of the drive to complete a successful start. In past papers authors developed estimation algorithms for the detection of condensate during section starting. This paper proposes and evaluates a new strategy that will complement the previous algorithms. This strategy will detect the presence of condensate from the condensate collapsing during the section shutdown. Proposed correlations are derived through a complete experimental evaluation in two experimental cylinders covering rim thicknesses up to 55 mm. The estimation algorithms are split in a low/moderate condensate load zone, and in a high condensate load zone. Results confirm the robustness and accuracy of the proposed algorithms.