Analysis of exergetic performance for a combined ultrasonic power/convective hot air dryer

Hui Wang, Mehdi Torki, Arian Taherian, Mohsen Beigi, Hong-Mei Xiao and Xiao-Ming Fang

Renewable and Sustainable Energy Reviews, 2023, vol. 185, issue C

Abstract: Recently, the effectiveness of combined use of non-thermal technologies to improve hot air dryers’ performance from both the energy and quality point of views has been proven. However, no study has been reported on thermodynamic analysis of such hybrid systems. The present work dealt the influence of ultrasonic power combination with convective hot air dryer on exergetic performance of the system. Potato cubes were dried at different drying air temperatures (45–65 °C) and velocities (0.5–1.5 m/s) and ultrasonic powers (0–0.08 kW). Based on the findings obtained through the experiments, the exergy loss varied averagely from 240.58 to 600.83 kJ, and was decreased continuously with increasing the power level. The average exergy destruction ranged from 169.61 to 1554.23 kJ, and was decreased at the higher air temperatures and velocities. Combination of ultrasonic power with hot air intensified the exergy destruction. The average exergy efficiency varied from 24.19 to 91.42% and from 11.67 to 38.27% for the drying chamber and process, respectively.

Keywords: Ultrasonic power; Exergy efficiency; Exergy destruction; Convective drying (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1016/j.rser.2023.113607

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