Design and optimization of heat pump with infrared drying for Glycyrrhiza uralensis (Licorice) processing

文献类型： 外文期刊

第一作者： Zhu, Lichun

作者： Zhu, Lichun;Li, Mengqing;Zhang, Xuetao;Ji, Xinyu;Zhang, Xiaoqiang;Zhu, Hongbo;Gu, Junzhe;Zhang, Qian;Yang, Xuhai;Xie, Yongkang;Zhang, Qian;Yang, Xuhai;Zhang, Qian

作者机构：

关键词： heat pump with infrared dryer; numerical simulation; structure optimization; drying quality; licorice

期刊名称：FRONTIERS IN NUTRITION （ 影响因子：5.0； 五年影响因子：5.7 ）

ISSN： 2296-861X

年卷期： 2024 年 11 卷

页码：

收录情况： SCI

摘要： A new dryer, integrating infrared and heat pump drying technologies, was designed to enhance licorice processing standardization, aiming at improved drying efficiency and product quality. Numerical simulation using COMSOL software validated the air distribution model through prototype data comparison. To address uneven air distribution, a spoiler was strategically placed based on CFD simulation to optimize its size and position using the velocity deviation ratio and non-uniformity coefficient as indices. Post-optimization, the average velocity deviation ratio decreased from 0.5124 to 0.2565%, and the non-uniformity coefficient dropped from 0.5913 to 0.3152, achieving a more uniform flow field in the drying chamber. Testing the optimized dryer on licorice demonstrated significant improvements in flow field uniformity, reducing licorice drying time by 23.8%. Additionally, optimized drying enhanced licorice color (higher L* value) and increased retention rates of total phenol, total flavone, and vitamin C. This research holds substantial importance for advancing licorice primary processing, fostering efficiency, and improving product quality.

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