Abstract In this study, grape pomace was dried in an infrared film dryer at 40, 45 and 50 °C surface temperatures to investigate the effects of heat transfer mechanism (natural and forced convection) and homogeneous drying on specific energy consumption, drying rate and drying time. Also, energy and exergy efficiencies were calculated. The average specific energy consumption values were calculated as 5.90, 4.49 and 4.07 kWh/kg in natural convection (Group 1) and 11.90, 11.32 and 11.81 kWh/kg in forced convection (Group 2), respectively. The maximum energy efficiency was observed as 54.71% at 45 °C in Group 1. Energy efficiencies at the experiments in Group 1 were found to be nearly 10% higher than Group 2. The maximum exergy efficiency was observed as 38.46% at 50 °C in Group 1, and the average exergy efficiency values for Group 1 and 2 were calculated as 34.84% and 33.76%, respectively. Group 2 experiments provided a faster drying process as expected. However, although forced convection was more effective in terms of drying time, natural convection was found more suitable considering all the performance parameters as a whole. This study offers a solution to dry grape pomace high quality, homogeneously and efficiently for industrial usage.

中文翻译：

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基于能量和火用方法的葡萄渣红外薄膜干燥性能分析

摘要 本研究采用红外薄膜干燥机在 40、45 和 50 °C 表面温度下干燥葡萄渣，以研究传热机制（自然对流和强制对流）和均质干燥对比能耗、干燥速率和干燥度的影响。时间。此外，还计算了能量和火用效率。计算出的平均单位能耗值分别为自然对流（第 1 组）中的 5.90、4.49 和 4.07 kWh/kg，以及强制对流（第 2 组）中的 11.90、11.32 和 11.81 kWh/kg。第 1 组在 45 °C 时观察到的最大能效为 54.71%。发现第 1 组实验的能效比第 2 组高近 10%。观察到最大火用效率在 50 °C 时为 38.46%在第 1 组中，第 1 组和第 2 组的平均火用效率值分别计算为 34.84% 和 33.76%。第 2 组实验提供了预期的更快干燥过程。然而，虽然强制对流在干燥时间方面更有效，但从整体上考虑所有性能参数，发现自然对流更合适。这项研究为工业用途提供了一种高质量、均质和高效的干葡萄渣解决方案。