Thermodynamic performance of hot air drying system: Energy and exergy analysis for wet glass containers in honey processing plant

IF 2.7 3区农林科学 Q3 ENGINEERING, CHEMICAL

Journal of Food Process Engineering Pub Date : 2024-10-08 DOI:10.1111/jfpe.14741

Ahmad Piri, Amin Hazervazifeh

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Abstract

Considering environmental challenges and the diminishing share of energy expenses in the final product cost, evaluating energy-intensive systems is crucial. This study examines the drying process of wet glass containers in a honey processing plant using a continuous convection dryer through energy and exergy analyses. Mass, energy, and exergy balances were performed using EES software. The energetic performance indicators revealed a heat loss rate of 3.33 kW, energy efficiency of 20.45%, and specific energy consumption of 11711.25 kJ kg^-1H₂O. Exergetic performance indicators included an exergy destruction rate of 24.05 kW, improvement potential rate of 20.79 kW, total exergy efficiency of 14.14%, exergy efficiency of 11.14%, specific exergy consumption of 2763.92 kJ kg^-1H₂O, and a sustainability index of 1.16. Results indicated that 60.12% of exergy destruction is related to air heating, with exhaust air losing 200.54 kW, equivalent to 89.84% of total input energy, suggesting exhaust air recirculation to reduce losses.

Practical applications

The wet container dryer in a honey processing plant, as the most energy-intensive component, was chosen for thermodynamic analysis. Mass, energy, and exergy balances were conducted to evaluate the system's thermodynamic performance. The exhaust air dryer lost 200.54 kW, equivalent to 89.84% of the total input energy, without utilization. Additionally, the results showed that 60.12% of the total exergy destruction in the convective drying process was related to air heating. Therefore, recirculating the exhaust air from the dryer moves the system toward an ideal thermodynamic state.

Abstract Image

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热空气干燥系统的热力学性能：蜂蜜加工厂湿玻璃容器的能量和放能分析

考虑到环境挑战和能源费用在最终产品成本中所占比例的不断降低，对能源密集型系统进行评估至关重要。本研究通过能量和放能分析，研究了蜂蜜加工厂使用连续对流干燥机干燥湿玻璃容器的过程。使用 EES 软件进行了质量、能量和放能平衡。能效指标显示，热损失率为 3.33 kW，能效为 20.45%，比能耗为 11711.25 kJ kg-1H₂O。放能性能指标包括放能破坏率 24.05 kW、改善潜力率 20.79 kW、总放能效率 14.14%、放能效率 11.14%、比能耗 2763.92 kJ kg-1H₂O，以及可持续性指数 1.16。结果表明，60.12% 的放能破坏与空气加热有关，废气损失 200.54 千瓦，相当于总输入能量的 89.84%，建议采用废气再循环来减少损失。实际应用我们选择了蜂蜜加工厂的湿容器干燥机作为能耗最大的部件进行热力学分析。进行了质量、能量和放能平衡，以评估系统的热力学性能。废气干燥器在未被利用的情况下损失了 200.54 千瓦，相当于总输入能量的 89.84%。此外，结果表明，对流干燥过程中总能量损失的 60.12% 与空气加热有关。因此，对干燥机排出的空气进行再循环可使系统达到理想的热力学状态。

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来源期刊

Journal of Food Process Engineering 工程技术-工程：化工

CiteScore

5.70

自引率

10.00%

发文量

259

审稿时长

2 months

期刊介绍： This international research journal focuses on the engineering aspects of post-production handling, storage, processing, packaging, and distribution of food. Read by researchers, food and chemical engineers, and industry experts, this is the only international journal specifically devoted to the engineering aspects of food processing. Co-Editors M. Elena Castell-Perez and Rosana Moreira, both of Texas A&M University, welcome papers covering the best original research on applications of engineering principles and concepts to food and food processes.