热气干燥中的热量和质量转移:实验评估和数值模拟
Jhony T Teleken1, Suélen M Amorim1, Sarah S S Rodrigues1
1Faculty of Chemical Engineering, Federal University of Southern and Southeastern Pará, Marabá 68505-080, PA, Brazil.
Foods (Basel, Switzerland)
|February 13, 2025
概括
一个新的数学模型准确地模拟了热空气干燥,揭示了不同的阶段,并验证了热量和质量转移参数. 该模型有助于优化脱水过程,以提高质量和安全性.
科学领域:
- 食品科学与技术 食品科学与技术
- 化学工程是化学工程的重要组成部分.
- 数学建模的数学建模
背景情况:
- 的易腐坏性要求使用诸如脱水等保存方法.
- 热空气干燥是一种常见的方法,但需要优化效率和质量.
- 了解热量和质量转移对于有效的脱水至关重要.
研究的目的:
- 开发和验证热空气干燥过程中湿度和温度分布的数学模型.
- 用实验和数值来确定关键的热量和质量转移参数.
- 分析干燥阶段以及形状对过程的影响.
主要方法:
- 为不规则形状域开发有限元素方法 (FEM) 模型.
- 试验确定对流热量/质量转移系数和水分有效扩散系数.
- 数值模型的验证,使用一个柜干燥机在60°C和70°C的实验数据.
主要成果:
- 该模型准确预测了的温度和湿度概况 (R2 ≥0.95).
- 确定了三个干燥阶段:升温,恒定速率和下降速率.
- 不规则形状建模比简化几何学得出了更现实的结果.
结论:
- 经过验证的数学模型有效地描述了的热空气干燥.
- 该模型允许对关键参数进行灵敏度分析和流程优化.
- 精确的建模支持对的质量和安全方面的进一步评估.
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