Effects of compression ratio on variation of stresses and residual oil ofcake in pressing process of castor beans and its curve fitting
来源期刊：中南大学学报(英文版)2015年第11期
论文作者：LIU Ru-kuan XU Fang-lei XIAO Zhi-hong LI Chang-zhu LI Hui ZENG Fan-tao YE Hong-qi
文章页码：4476 - 4482
Key words：castor bean; residual oil; critical compression ratio; oil production value; energy consumption value
Abstract: the relationships among compression ratio and stress, compression ratio and residual oil of cake in pressing process of castor beans were studied using the test equipment under different states of oilseeds and ways of pressing manners. The results show that variation of stress increases nonlinearly and residual oil rate decreases with the increase of compression ratio. Lower residual oil of cake was obtained by pressing gently and frequently. Curve fitting on both relationships had been built and parameters for the model were obtained by least square procedure and deepening research on pressing process of the castor beans for castor oil. By assuming that the value of oil production is equivalent to the value of energy consumption, the critical compression ratio of intact seeds is 6.2 while that of crushed seeds is 3.6.
LIU Ru-kuan(刘汝宽)1, 2, XU Fang-lei(许方雷)3, XIAO Zhi-hong(肖志红)2, LI Chang-zhu(李昌珠)2, LI Hui(李辉)2, ZENG Fan-tao(曾凡涛)1,2, YE Hong-qi(叶红齐)1
(1. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
2. Hunan Academy of Forestry, Changsha 410004, China;
3. School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China)
Abstract:the relationships among compression ratio and stress, compression ratio and residual oil of cake in pressing process of castor beans were studied using the test equipment under different states of oilseeds and ways of pressing manners. The results show that variation of stress increases nonlinearly and residual oil rate decreases with the increase of compression ratio. Lower residual oil of cake was obtained by pressing gently and frequently. Curve fitting on both relationships had been built and parameters for the model were obtained by least square procedure and deepening research on pressing process of the castor beans for castor oil. By assuming that the value of oil production is equivalent to the value of energy consumption, the critical compression ratio of intact seeds is 6.2 while that of crushed seeds is 3.6.
Key words:castor bean; residual oil; critical compression ratio; oil production value; energy consumption value
