Optimizing the drying parameters of a fixed bed with reversing ventilation for peanut using computer simulation  

作　　者：Jianchun Yan Huanxiong Xie Hai Wei Huichang Wu Zhaoyan You 

机构地区：[1]Nanjing Institute of Agricultural Mechanization,Ministry of Agriculture and Rural Affairs,Nanjing 210014,China

出　　处：《International Journal of Agricultural and Biological Engineering》2021年第5期255-266,共12页国际农业与生物工程学报（英文）

基　　金：supported by the Special Expenses for Basic Scientific Research of the Chinese Academy of Agricultural Sciences(Grant No.S201937);New Equipment and New Technology Research,Development and Promotion Project of Jiangsu Province Agricultural Machinery(Grant No.SZ120180032).

摘　　要：To obtain the optimal operation parameters of fixed-bed reversing ventilation drying of peanuts,a set of partial differential equations indicating the heat and mass transfer relationships between the peanut pods and air during drying was proposed.Then,a series of discretized models were established for simulation,and the time consumed,unevenness,and energy consumption for batch drying were calculated.The results showed that reversing ventilation and segmented drying was helpful to these issues for high drying ability.The optimal operation parameters were determined by uniform design experimentation of mathematical simulation.The result showed that when the moisture content(wet basis)was above 22%,a ventilation velocity of 0.46 m/s was optimal;when the moisture content was between 8%and 22%,a ventilation velocity of 0.20 m/s was optimal.Using the optimal parameters,the computer simulating result was compared with the experimental results.The correlation coefficients between the simulating and the experimental values for the temperature and moisture content were all above 0.98 and the quality of dried peanuts was close to that of natural sun-dried ones,which indicates that the optimization results of the drying parameters are highly reliable.

关 键 词：PEANUT fix bed drying reversing ventilation SIMULATION OPTIMIZATION 

分 类 号：O17[理学—数学]