2007
DOI: 10.1080/07373930601161120
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Study of Residence Time Distribution in a Pilot-Scale Screw Conveyor Dryer

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Cited by 42 publications
(36 citation statements)
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“…Waje et al [4,5] have provided a logical stepwise procedure for screw conveyor dryer design based on the heat and mass transfer calculations. Recently, Waje et al [6] have studied the residence time distribution and the flow patterns in SCD using a pulse tracer technique and found that the flow predominantly lies between the ideal plug flow and the mixed flow regime.…”
Section: Introductionmentioning
confidence: 99%
“…Waje et al [4,5] have provided a logical stepwise procedure for screw conveyor dryer design based on the heat and mass transfer calculations. Recently, Waje et al [6] have studied the residence time distribution and the flow patterns in SCD using a pulse tracer technique and found that the flow predominantly lies between the ideal plug flow and the mixed flow regime.…”
Section: Introductionmentioning
confidence: 99%
“…9 Waje et al conducted a series of experiments and published several papers about screw conveyor dryer. [10][11][12][13] They investigated residence time distribution (RTD) and mean residence time (MRT) in screw dryer conveyor and found out that with the increasing screw speed, degree of mixing is increased but MRT is decreased. The flow in a screw conveyor dryer approaches plug flow as the feed rate is increased, whereas an increase in the screw speed results in a mixed flow.…”
Section: Introductionmentioning
confidence: 99%
“…The flow in a screw conveyor dryer approaches plug flow as the feed rate is increased, whereas an increase in the screw speed results in a mixed flow. 10 The MRT can be better controlled with screw speed rather than the solids flow rate. The discharge uniformity was found to be a strong function of the solids flow rate and the screw speed.…”
Section: Introductionmentioning
confidence: 99%
“…A flow of gas inside the drier, with the sole purpose of transporting the evaporated moisture away from the material, is an important factor. The flow of gas can enter and exit from the drier extremes and be cocurrent or countercurrent with the motion of the material to be dried [5], [6].…”
Section: S429mentioning
confidence: 99%
“…The thermal power absorbed by the material is divided into sensible power, which is necessary to increase the temperature of the material, and in latent power for the vaporization of the moisture content in the material: In steady state conditions, the thermal power absorbed by the material is equal to the actual thermal power transferred from the heat transfer fluid, equal to: (5) where U t [W/(m 2 K)] is the global coefficient of heat exchange of the drier, A eff [m 2 ] is the effective area of heat exchange, ΔT lm [°C] is the logarithmic temperature difference between incoming and outgoing heat transfer and fluid material. These three parameters determine the drier ability to transfer heat to the material to be dried.…”
Section: Thermodynamic Properties Of Indirect Scdmentioning
confidence: 99%