Performance evaluation of MOF-coated desiccant-assisted intermittent heat pump drying for energy-efficient dehydration of apple slices

IF 5.4 3区工程技术 Q2 ENERGY & FUELS

Thermal Science and Engineering Progress Pub Date : 2025-09-16 DOI:10.1016/j.tsep.2025.104121

Win-Jet Luo , Prateek Negi , Yun-Ching Chang , Chengyou Zuo , Bivas Panigrahi

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引用次数: 0

Abstract

The pursuit of energy-efficient drying technologies that preserve product quality is crucial in food preservation. This study explores a novel method utilizing metal–organic frameworks (MOFs) coated on an auxiliary condenser to enhance the performance of heat pump drying systems for apple slices. The research is structured in two phases. The first evaluates drying behavior under continuous and intermittent modes, emphasizing drying curves and system efficiency. The second phase integrates an MOF-coated desiccant-coated heat exchanger (DCHE) into intermittent drying, employing a bypass air duct for improved dehumidification. An exponential model was adapted for intermittent operation. The model effectively predicted the moisture ratio (MR) with high accuracy, achieving R² values of 0.9703 for 2.5 mm slices and 0.9621 for 5 mm slices. MOF-DCHE-assisted intermittent drying reduced drying time by 18.18 % (5 mm slices) and 6.67 % (2.5 mm slices), at intermittent ratios of 0.54 and 0.88, respectively. Additionally, it improved the specific moisture extraction rate (SMER) by 5.4 % for 5 mm slices and 3.7 % for 2.5 mm slices compared to non-assisted modes. Energy consumption was reduced by 25.5 % for 5 mm slices compared to continuous drying. Sensory analysis confirmed excellent retention of key attributes such as flexibility, aroma, flavor, and overall liking, highlighting enhanced product quality. Integrating MOF-DCHE into heat pump drying systems thus demonstrates a promising and sustainable method for improving drying efficiency, reducing energy consumption, and preserving the dried fruit quality.

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mof包覆干燥剂辅助间歇热泵干燥高效脱水苹果片的性能评价

追求保持产品质量的节能干燥技术在食品保鲜中至关重要。本研究探索了一种利用金属有机框架（mof）涂层在辅助冷凝器上的新方法，以提高苹果片热泵干燥系统的性能。本研究分为两个阶段。首先评估连续和间歇模式下的干燥行为，强调干燥曲线和系统效率。第二阶段将mof涂层干燥剂涂层热交换器（DCHE）集成到间歇干燥中，采用旁路风管来改善除湿。间歇式操作采用指数模型。该模型对水分比（MR）的预测精度较高，2.5 mm切片的R2值为0.9703,5 mm切片的R2值为0.9621。mof - dche辅助间歇干燥在间歇比为0.54和0.88时，干燥时间分别缩短18.18% （5 mm片）和6.67% （2.5 mm片）。此外，与非辅助模式相比，它提高了5毫米片的比湿提取率（SMER） 5.4%， 2.5毫米片的比湿提取率（SMER） 3.7%。与连续干燥相比，5毫米切片的能耗降低了25.5%。感官分析证实了良好的保留关键属性，如柔韧性，香气，风味和整体喜欢度，突出提高了产品质量。因此，将MOF-DCHE集成到热泵干燥系统中展示了一种有前途的可持续方法，可以提高干燥效率，降低能耗，并保持干果质量。

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来源期刊

Thermal Science and Engineering Progress Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

7.20

自引率

10.40%

发文量

327

审稿时长

41 days

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