Optimisation of specific absorption heat rate distribution in microwave DIC reactor

IF 3.4 2区农林科学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Food and Bioproducts Processing Pub Date : 2025-09-05 DOI:10.1016/j.fbp.2025.09.006

Magdalena Kristiawan , Ladislav Klíma , Karim Allaf , Václav Sobolík

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Abstract

The distribution of specific absorption heat rate (SAHR) was evaluated across seven configurations of a microwave cavity in a pilot-scale DIC (Détente Instantanée Contrôlée) reactor. The configurations featured two waveguide apertures, one vertical with two wings and the other horizontal with one wing. SAHR values were calculated from temperature evolution in 2 % Agar gel samples heated by microwave radiation at 2450 MHz. The temperature was measured using eight fibre-optic sensors embedded in a Teflon cross, placed successively at eight different heights along a 306 mm-long glass tube. The experiments demonstrated that SAHR homogeneity is strongly influenced by cavity configuration, with the right vertical aperture and back-wing (R_B) configuration achieving the most uniform axial and radial distributions. Furthermore, SAHR profiles at 500 W and 1500 W exhibited consistency, displaying the scalability of the optimal configuration for diverse power levels. These findings offer valuable insights for optimizing microwave cavity designs to enhance heating uniformity and efficiency in industrial applications.

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微波DIC反应器比吸收热速率分布的优化

在中试规模的DIC （dsamtente instantan Contrôlée）反应器中，评估了7种构型微波腔的比吸收热速率（SAHR）分布。这种结构有两个波导孔径，一个垂直的有两个机翼，另一个水平的有一个机翼。根据2 %琼脂凝胶样品在2450 MHz微波辐射下加热的温度演变计算SAHR值。测量温度的方法是将8个光纤传感器嵌入一个特氟龙十字架中，沿着306毫米长的玻璃管依次放置在8个不同的高度。实验表明，腔体结构对SAHR的均匀性影响较大，其中右垂直孔径和后翼（R_B）结构的轴向和径向分布最均匀。此外，500 W和1500 W的SAHR配置文件显示出一致性，显示了不同功率水平下最优配置的可扩展性。这些发现为优化微波腔设计以提高工业应用中的加热均匀性和效率提供了有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Food and Bioproducts Processing 工程技术-工程：化工

CiteScore

9.70

自引率

4.30%

发文量

115

审稿时长

24 days

期刊介绍： Official Journal of the European Federation of Chemical Engineering: Part C FBP aims to be the principal international journal for publication of high quality, original papers in the branches of engineering and science dedicated to the safe processing of biological products. It is the only journal to exploit the synergy between biotechnology, bioprocessing and food engineering. Papers showing how research results can be used in engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in equipment or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of food and bioproducts processing. The journal has a strong emphasis on the interface between engineering and food or bioproducts. Papers that are not likely to be published are those: • Primarily concerned with food formulation • That use experimental design techniques to obtain response surfaces but gain little insight from them • That are empirical and ignore established mechanistic models, e.g., empirical drying curves • That are primarily concerned about sensory evaluation and colour • Concern the extraction, encapsulation and/or antioxidant activity of a specific biological material without providing insight that could be applied to a similar but different material, • Containing only chemical analyses of biological materials.