干燥时可变空气温度的加热模式的实用性;对干燥时间,能源消耗和产品质量的影响
Reza Hossein Nia1, Habibeh Nalbandi1, Sadegh Seyedlou1
1Department of Biosystem Engineering, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
概括
可变空气温度干燥显著减少了大干燥时间,并保持了营养质量. 模式III (70°C30分钟,然后50°C) 提供最佳的结果,最大限度地减少抗氧化剂的损失和颜色变化.
科学领域:
- 食品科学 食品科学 食品科学
- 农业工程 农业工程
- 过程优化 过程优化
背景情况:
- 干燥对于食品的保存至关重要,但传统方法会降低质量.
- 可变空气温度干燥提供了提高效率和产品质量的潜力.
- 优化加热模式是平衡干燥时间,能源使用和营养保留的关键.
研究的目的:
- 评估不同可变空气温度加热模式对大干燥的影响.
- 为了确定大干燥的最佳空气温度变化点.
- 评估对干燥时间,能源消耗和大质量属性的影响.
主要方法:
- 用恒定的空气温度 (50°C,60°C,70°C) 干燥片.
- 用三个模式测试了可变空气温度干燥:60°C → 50°C (I),70°C → 50°C (II),以及70°C (30分钟) → 50°C (III).
- 分析了干燥时间,颜色变化,抗氧化剂含量和有效的湿度扩散率.
主要成果:
- 恒定的50°C干燥导致显著的抗氧化剂损失 (45%) 和长干燥时间 (136分钟).
- 恒定70°C的干燥缩短了时间 (65分钟),但引起了峰值颜色变化.
- 与恒定50°C相比,可变空气温度模式III显示干燥时间和抗氧化剂损失减少了24%,颜色改善和扩散性更高.
结论:
- 可变空气温度干燥,特别是模式III,对于保持大质量是优越的.
- 这种方法优化了干燥时间,最大限度地降低了营养降解,并保持了可接受的产品颜色.
- 这些发现为高效和高质量的大脱水过程提供了关键的见解.
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