Abstract
［Objective］ To understand the microwave heating characteristics and moisture content changes of fresh Camellia oleifera seeds.［Methods］ Numerical simulations coupling electromagnetic loss with solid/fluid heat transfer are conducted to analyze the temperature rise characteristics of a single C.oleifera seed,thereby determining the appropriate sample placement and microwave power ranges.Microwave drying experiments of individual and small batches of C.oleifera seeds are performed to validate the numerical results against the actual internal and surface temperatures.Two -term,Henderson and Pabis,and Midilli and Kucuk models are employed to fit the dry basis moisture content changes to analyze the microwave drying kinetics of C.oleifera seeds.［Results］ The actual temperatures of C.oleifera seeds are in general consistence with the simulated results,which validates the reliability of the numerical simulations.The microwave drying process of C.oleifera seeds can be divided into three stages:acceleration,stabilization,and deceleration,and the Midilli and Kucuk model can accurately describe this drying kinetics behavior.Under the preferred drying conditions (microwave power of 200~350 W,single heating duration of 5 min,and interval duration of 2 min ),a single batch of C.oleifera seeds (200 g) can achieve the desired dry basis moisture content (9%) in 42~126 min.This drying method has a 70%~90% higher efficiency than conventional hot -air drying or infrared drying and avoids carbonization and cracking due to overheating.［Conclusion］ Microwave heating technology can realize efficient and controllable drying of fresh C.oleifera seeds.
Publication Date
4-3-2025
First Page
97
Last Page
106
DOI
10.13652/j.spjx.1003.5788.2024.80632
Recommended Citation
Li, XIAO; lijun, LI; Hong, LUO; and Dan, HUANG
(2025)
"Numerical simulation and experimental study of microwave drying of Camellia oleifera seeds,"
Food and Machinery: Vol. 41:
Iss.
1, Article 12.
DOI: 10.13652/j.spjx.1003.5788.2024.80632
Available at:
https://www.ifoodmm.cn/journal/vol41/iss1/12
References
[1] 樊梦珂,陈鹏枭,刘烨,等.高水分小麦热风干燥后品质的变化[J].食品与机械,2024,40(2):139-145, 191.FAN M K,CHEN P X,LIU Y,et al.Study of quality changes in high moisture wheat after hot air drying [J].Food & Machinery,2024,40(2):139-145,191.
[2] 李义璨,郑霞,姚雪东,等.超声预处理哈密瓜片红外干燥工艺优化 [J].食品与机械,2023,39(3):201-206,240.LI Y C,ZHENG X,YAO X D,et al.Optimization of the infrared drying process for ultrasonic pretreatment of Hami-melon slices [J].Food & Machinery,2023,39(3):201-206,240.
[3] 吕为乔,宿佃斌,王天行,等.热烫藕条微波滚动干燥热场分布及脱水品质 [J].食品与生物技术学报,2020,39(7):105-111.LYU W Q,SU D B,WANG T X,et al.Temperature-field distribution and dehydrated quality of lotus-root sticks during microwave rolling-bed drying [J].Journal of Food Science and Biotechnology,2020,39(7):105-111.
[4] 张瑞,李国伟,刘扬,等.坚果干燥技术研究现状分析及展望[J].新疆农机化,2023 (2):34-38,48.ZHANG R,LI G W,LIU Y,et al.Analysis and prospect of nut drying technology [J].Xinjiang Agricultural Mechanization,2023 (2):34-38,48.
[5] 赵红霞,王应强,马玉荷,等.微波干燥条件对杏脯干燥特性与品质的影响 [J].食品与机械,2023,39(4):123-129.ZHAO H X,WANG Y Q,MA Y H,et al.Effects of different microwave drying conditions on drying characteristics and quality of preserved apricots [J].Food & Machinery,2023,39(4):123-129.
[6] 王乐意,李长河,刘明政,等.中药材干燥技术与装备研究现状[J].农业工程学报,2024,40(2):1-28.WANG L Y,LI C H,LIU M Z,et al.Research status of drying technology and equipment for Chinese medicinal materials [J].Transactions of the Chinese Society of Agricultural Engineering,2024,40(2):1-28.
[7] 唐小闲,陈海荣,任爱清,等.不同干燥方法对三华李片干燥特 性 及 营 养 成 分 的 影 响 [J].食 品 研 究 与 开 发,2022,43(24):42-50.TANG X X,CHEN H R,REN A Q,et al.Effects of different drying methods on the drying characteristics and nutrient quality of Sanhua plum slices [J].Food Research and Development,2022,43(24):42-50.
[8] 陈苏森,吉训志,张映萍,等.不同干燥方式对斑兰叶挥发性成分的影响 [J].中国热带农业,2024 (2):53-60.CHEN S S,JI X Z,ZHANG Y P,et al.The effect of different drying methods on the volatile components of Pandanus amaryllifolius roxb leaves [J].China Tropical Agriculture,2024(2):53-60.
[9] 姜龙,李丹丹,王文亮,等.生姜干燥技术研究进展 [J].中国果菜,2024,44(2):41-46.JIANG L,LI D D,WANG W L,et al.Research progress of drying technology of ginger [J].China Fruit & Vegetable,2024,44(2):41-46.
[10] 王磊,沈柳杨,刘成海,等.微波干燥浆果过程中料层电场分布影响能量利用分析 [J].农业工程学报,2021,37(4):1-10.WANG L,SHEN L Y,LIU C H,et al.Effect of electric field distribution on energy use efficiency for berry puree under microwave drying [J].Transactions of the Chinese Society of Agricultural Engineering,2021,37(4):1-10.
[11] 付文杰,李静,裴永胜,等.微波干燥温度分布对胡萝卜干燥特性与品质的影响 [J].中国食品学报,2023,23(5):151-161.FU W J,LI J,PEI Y S,et al.Effect of microwave drying temperature distribution on drying characteristics and quality of carrot [J].Journal of Chinese Institute of Food Science and Technology,2023,23(5):151-161.
[12] 甘 婷,易 萍,黄 敏,等.芒 果 微 波 干 燥 特 性 及 数 学 模 型 研 究[J].食品科技,2024,49(1):19-26.GAN T,YI P,HUANG M,et al.Mango microwave drying characteristics and kinetic model analysis [J].Food Science and Technology,2024,49(1):19-26.
[13] 宋树杰,王蒙.熟化紫薯片微波干燥特性及数学模型 [J].食品与发酵工业,2020,46(2):85-93.SONG S J,WANG M.Microwave drying characteristics and kinetic model of cooked purple sweet potato slice [J].Food and Fermentation Industries,2020,46(2):85-93.
[14] ZHOU J,YANG X Q,CHU Y,et al.A novel algorithm approach for rapid simulated microwave heating of food moving on a conveyor belt [J].Journal of Food Engineering,2020,282:110029.
[15] TAMANG S,ARAVINDAN S.Joining of dissimilar metals by microwave hybrid heating:3D numerical simulation and experiment [J].International Journal of Thermal Sciences,2022,172:107281.
[16] PATEL D K,BHOI N K,SINGH H.Microwave heating capabilities of different susceptor material:experimental and simulation study [J].Silicon,2022,14(12):6 621-6 635.
[17] LUO H,ZHANG Y M,YU J W,et al.Microwave-enabled rapid volumetric heating of moldable low-dielectric-loss glass[J].Case Studies in Thermal Engineering,2024,57:104364.
[18] XIE W,CHEN P,WANG F,et al.Dielectric properties of Camellia oleifera seed kernels related to microwave and radio frequency drying [J].International Food Research Journal 2019,26(5):1 577-1 585.
[19] 王鹏凯.多温区网带式干燥机热流场模拟与试验研究 [D].长沙:中南林业科技大学,2022:7-13.WANG P K.Temperature and flow fields simulation and experimental research on multi-temperature zone mesh belt dryers [D].Changsha:Central South University of Forestry & Technology,2022:7-13.
[20] PHAM N D,KHAN M H,KARIM M A.A mathematical model for predicting the transport process and quality changes during intermittent microwave convective drying [J].Food Chemistry,2020,325:126932.
[21] 罗贤飞.烘焙条件对油茶籽油抗氧化能力和风味物质的影响研究 [D].长沙:中南林业科技大学,2023:6-9.LUO X F.Study on the effect of roasting conditions on antioxidant capacity and flavor substances of Camelina seed oil[D].Changsha:Central South University of Forestry & Technology,2023:6-9.
[22] 左 青,窦 维 祥,左 晖.油 茶 籽 制 油 技 术 实 践 [J].中 国 油 脂,2018,43(7):14-18.ZUO Q,DOU W X,ZUO H.Practical techniques for oil extraction from Camellia oleifera seeds [J].China Oils and Fats,2018,43(7):14-18.
[23] 丁 卫 新.浅 谈 新 国 标 中 粮 食 水 分 测 定 [J].现 代 面 粉 工 业,2017,31(1):24-26.DING W X.Discussion on the determination of grain moisture content in the new national standard [J].Modern Flour Milling Industry,2017,31(1):24-26.
[24] HUANG D,MEN K,TANG X,et al.Microwave intermittent drying characteristics of Camellia oleifera seeds [J].Journal of Food Process Engineering,2021,44(1):e13608.
[25] 李大鹏,李港庆,汪志强.油茶籽热风干燥特性及不同模型研究 [J].农机化研究,2023,45(8):117-123.LI D P,LI G Q,WANG Z Q.Study on the three-factor characteristics of hot-air drying of Camellia seed [J].Journal of Agricultural Mechanization Research,2023,45(8):117-123.
[26] 黄敏,甘婷,易萍,等.芒果切片热风干燥特性及模型 [J].食品与机械,2024,40(4):179-186,209.HUANG M,GAN T,YI P,et al.Hot air drying characteristics and model of Mango slices [J].Food & Machinery,2024,40(4):179-186,209.
[27] 张雪波,刘显茜,邹三全,等.哈密瓜切片热风干燥特性及数学模型 [J].食品与机械,2022,38(2):130-136,142.ZHANG X B,LIU X Q,ZOU S Q,et al.Hot-air drying characteristics and mathematical model of cantaloupe slices [J].Food & Machinery,2022,38(2):130-136,142.