MATHEMATICAL MODELING OF ROUGH RICE DRYING IN A FLUIDIZED BED DRYER
Fluidized bed drying experiments were conducted for rough rice at drying air temperatures of 50, 60 and 70℃, superficial fluidization velocities of 2.3, 2.5 and 2.8 m/s and solids holdups of 0.66 and 1.32 kg.Various popular empirical and semi empirical drying models were used to fit the drying data.Comparison of the coefficient of determination, reduced chi-square, root mean square error and plot of residual showed that the Midilli et al.model was the best model in describing fluidized bed drying characteristics of rough rice.Drying parameters of the Midilli et al.model were correlated with drying air temperature, superficial fluidization velocity and initial stagnant bed height.Also the effect of various operating variables on the fluidized bed drying characteristics of rough rice was studied.It was found that the drying air temperature has a dominant effect on drying kinetics.Increasing the air temperature increases the drying rate.The drying rate increased marginally with increase in the superficial fluidization velocities, while decreased marginally with increase in the solids holdup.
fluidized bed drying modelling rough rice
M Khanali Sh Rafiee A Jafari B Noudoust SH Hashemabadi A Banisharif
Department of Agricultural Machinery Engineering,Faculty of Agricultural Engineering and Technology, Computer Aided Process Engineering Lab.,Department of Chemical Engineering,Iran University of Scienc College of engineering,school of Chemical Engineering,University of Tehran,Tehran,Iran
国际会议
The 7th Asia-Pacific Drying Conference(第七届亚太地区干燥会议 ADC2011)
天津
英文
1-8
2011-09-18（万方平台首次上网日期，不代表论文的发表时间）