Heat Pump Drying Characteristics and Kinetic Modeling of Dendrocalamus hamiltonii Bamboo Shoots
In order to study the heat pump drying characteristics of Dendrocalamus hamiltonii bamboo shoots,improved the drying efficiency and shorten the drying time.The effects of different drying temperatures(50,60,70,80 ℃)and loading volumes(0.2,0.3,0.4,0.5 kg)on the moisture content and drying rate of Dendrocalamus hamiltonii bamboo shoots were explored.Eight drying kinetic models,including Page,Modified Page,Logarithmic,Midilli,Two-term,Two-term exponential,Duffusion,Wang and Singh,were selected to fit the drying process.Meanwhile,the drying dynamics models were established.The results showed that with the increase in temperature and the reduction of loading,the drying time of Dendrocalamus hamiltonii bamboo shoots was shortened,the moisture ratio was decreased,and the drying rate was accelerated during the heat pump drying.The effective water diffusion coefficient of Dendrocalamus hamiltonii bamboo shoots ranged from 1.56025×10-8 m2/s to 2.13774×10-8 m2/s,and the activation energy was 7.620 kJ/mol.Among the eight drying models,the Midilli model had the best fitting effect(The average value of R2 was 0.99887,and the average values of root mean square error(RMSE)and sum of squares for error(SSE)were 0.00919 and 0.003351 respectively),and can describe the trend of moisture content in the process of heat pump drying,to provide the theoretical basis for production.
Dendrocalamus hamiltonii bamboo shootsheat pump dryingdrying characteristicskinetic model
万方数据
维普
