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Dynamic simulation and control of conveyor-belt dryers

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dc.contributor.author Kiranoudis, CT en
dc.contributor.author Maroulis, ZB en
dc.contributor.author Marinos-Kouris, D en
dc.date.accessioned 2014-03-01T01:09:51Z
dc.date.available 2014-03-01T01:09:51Z
dc.date.issued 1994 en
dc.identifier.issn 0737-3937 en
dc.identifier.uri http://hdl.handle.net/123456789/11214
dc.subject Dynamic Simulation en
dc.subject.classification Engineering, Chemical en
dc.subject.classification Engineering, Mechanical en
dc.subject.other Atmospheric humidity en
dc.subject.other Belt conveyors en
dc.subject.other Control en
dc.subject.other Cooling en
dc.subject.other Drying en
dc.subject.other Dynamics en
dc.subject.other Heat transfer en
dc.subject.other Mass transfer en
dc.subject.other Mathematical models en
dc.subject.other Simulators en
dc.subject.other Temperature control en
dc.subject.other Thermal effects en
dc.subject.other Conveyor belt dryer en
dc.subject.other Digital simulation en
dc.subject.other Drying air humidity en
dc.subject.other Drying air temperature en
dc.subject.other Drying chamber en
dc.subject.other Dynamic simulation en
dc.subject.other Moisture content en
dc.subject.other Dryers (equipment) en
dc.title Dynamic simulation and control of conveyor-belt dryers en
heal.type journalArticle en
heal.identifier.primary 10.1080/07373939408962188 en
heal.identifier.secondary http://dx.doi.org/10.1080/07373939408962188 en
heal.language English en
heal.publicationDate 1994 en
heal.abstract The dynamic behavior of conveyor-belt dryers involving externally controlled heat and mass transfer phenomena has been studied via digital simulation. The investigation concerned an industrial dryer used for the moisture removal from wet raisins. The dryer consisted of three drying chambers and a cooling section, all involving the same conveyor belt. For each chamber, perfect temperature control was assumed for the drying air temperature, while its humidity was left uncontrolled. The effect of material temperature and moisture content at the entrance of the dryer and the drying air temperature on material temperature and moisture content at the exit of the dryer and the corresponding drying air humidity, have been explored by step forcing the disturbance and manipulated variables in the non-linear dryer model simulator. Results showed that material moisture content at the exit of the dryer is greatly affected by material moisture content at the entrance as well as by the drying air temperature. Reliable transfer functions for each process module were obtained by fitting several transfer function models on the simulated data using a least-squares approach. It was found that when input material moisture content could be instantly measured, the system responded slowly enough so that excellent control could be achieved for material moisture content at the exit of each chamber. In this case a PI-feedback cascade temperature controller was used. When a 15 sec delay measuring sensor was introduced, poor performance was observed. A simplified lead-lag feedforward controller, added to the system, in conjunction with the primary PI-feedback cascade controller, resulted in good control performance of the delay sensor system. en
heal.publisher Marcel Dekker Inc, New York, NY, United States en
heal.journalName Drying Technology en
dc.identifier.doi 10.1080/07373939408962188 en
dc.identifier.isi ISI:A1994PG40000004 en
dc.identifier.volume 12 en
dc.identifier.issue 7 en
dc.identifier.spage 1575 en
dc.identifier.epage 1603 en


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