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   Effect of Process Parameters on Quality Properties and Drying Time of Hawthorn in A Vibro-Fluidized Bed Dryer  
   
نویسنده Farzan Elham ,Rahimi Mahmood Reza ,Madadi Vahid
منبع Journal Of Particle Science And Technology - 2017 - دوره : 3 - شماره : 1 - صفحه:51 -62
چکیده    The drying kinetics of hawthorn in a pilotscale experimental fluidized bed dryer with and without vibration was investigated. the effect of operating parameters, such as vibration intensity, drying air flow rate, and temperature, on the drying rate and shrinkage of hawthorn was studied. the hawthorn fruit was dried at various drying air temperatures ranging from 4070°c and drying air volume flow rates ranging from 2230 m³/h with the vibration intensity ranging from 6.8 to 8.2 hz. the entire drying process occurred in the falling rate period and no constant rate period was observed in the drying of hawthorn. four mathematical drying models investigating the drying behavior of hawthorn were evaluated and then the experimental moisture data were fitted in these models. the quality of the models fitting was assessed using the coefficient of determination, chisquare and root mean square error. the logarithmic and page models for drying rate and the ratti and vazquez models for shrinkage were found to be the most suitable for describing the drying and shrinkage curves of hawthorn. the results showed that the vibration intensity, drying air temperature and flow rate has no significant effect on the shrinkage of hawthorn. all mentioned parameters had a significant effect on the drying rate of hawthorn, but the effect of drying air temperature was considerably more compared to the other parameters. it was observed that shrinkage varies linearly with respect to moisture content, and the reduction in radial dimension of hawthorn samples was around 40% at the end of the drying process.
کلیدواژه Vibro-Fluidized Bed Dryer ,Hawthorn Drying ,Shrinkage ,Drying Rate ,Mathematical Modelling
آدرس Yasouj University, Department Of Chemical Engineering, ایران, Yasouj University, Department Of Chemical Engineering, ایران, Yasouj University, Department Of Chemical Engineering, ایران
پست الکترونیکی v.madadi@yu.ac.ir
 
     
   
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