Circulating Concurrent-flow Drying Simulation of Rapeseed
2010
Han, J.W., Kongju National University, Yesan, Republic of Korea | Keum, D.H., Sungkyunkwan University, Suwon, Republic of Korea | Kim, W., Kongju National University, Yesan, Republic of Korea | Duc, Le Anh, NongLam University, Vietnam | Cho, S.H., Sungkyunkwan University, Suwon, Republic of Korea | Kim, H., Korea Food Research Institute, Sungnam, Republic of Korea
In this study, computer simulations were conducted to assess the use of a circulating concurrent-flow dryer for rapeseed drying and to determined the effect of this drying method on the germination ratio of rapeseed after the drying process was complete. The simultaneous heat and mass transfer between air and rapeseed in a concurrent-flow dryer was examined by simulation. The drying simulation was based on several parameters with sequent time series. Equations concerning air psychrometrics, physical properties, thermal properties, equilibrium moisture content, thin layer drying of rapeseed, etc. were all combined to solve the simulation models. Based on energy and mass transfer in the concurrent-flow drying model, a simulation program for the circulating concurrent-flow rapeseed dryer was built along with a detailed description of the mathematical solution to the model. A pilot scale circulating concurrent-flow dryer(200 kg/batch) was used to verify the fitness of the simulation program. A comparison between the experimental data and the model predicted results was presented and discussed. The drying parameters and germination ratio were analyzed and the accuracy of the simulation program was evaluated. The simulation program proved to be reliable and was shown to be a convenient tool for predicting rapeseed drying and germination ratio of rapeseed in a concurrent-flow dryer.
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