黑胡椒颗粒的介电特性混合方程研究
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Mixing Equations for Dielectric Properties of Black Pepper Particles
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    摘要:

    通过介电混合方程对黑胡椒颗粒的介电特性进行推算,对比模拟值与实验值以验证介电特性混合方程的适用性。以黑胡椒颗粒为研究对象,测定压缩黑胡椒粉的介电特性,并运用介电特性混合方程-CRIME方程、LLLE方程、BE方程计算获得胡椒颗粒的介电特性,随后运用COMSOL Multiphysics软件建立静电场-热传导双向耦合模型对射频加热仿真,并通过27.12 MHz,12 kW的平行极板式射频系统进行加热实验验证。采用CRIME方程获得的胡椒颗粒介电特性运用在仿真中与试验结果温度分布为最接近。作者证明了通过压缩胡椒粉末介电特性代入CRIME方程能够有效获得黑胡椒颗粒的介电特性,这有助于工业生产中颗粒物料射频加热工艺的研发。

    Abstract:

    The aim of the research is to find the optimum mixing equation for dielectric properties and verify its prediction accuracy in a radio frequency heating process. By measuring the dielectric constant of ground black pepper powder, the corresponding dielectric properties of particles were calculated using CRIME, LLLE and BE equation, respectively. The obtained dielectric properties were applied in COMSOL Multiphysics simulation for a radio frequency heating process and then verified by a parallel-plate radio frequency system (27.12 MHz, 12 kW). Results showed that the dielectric properties obtained by the CRIME equation provided the most reasonable temperature distribution as compared to the experimental results. The research proves that CRIME equation is a suitable model for black pepper particle dielectric properties, which may have an industrial application for heating process prediction of other granular materials.

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王品正,李锋,张汝怡,朱亚莉,李双,焦阳.黑胡椒颗粒的介电特性混合方程研究[J].食品与生物技术学报,2020,39(7):36-43.

WANG Pinzheng, LI Feng, ZHANG Ruyi, ZHU Yali, LI Shuang, JIAO Yang. Mixing Equations for Dielectric Properties of Black Pepper Particles[J]. Journal of Food Science and Biotechnology,2020,39(7):36-43.

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  • 在线发布日期: 2020-10-21
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