Experimental study and analysis of porous thin plate drying in a convection dryer |
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| Affiliation: | 1. MOE Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Beijing 102206, China;2. Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, MO 65211, USA;1. Green Energy & Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 310, Taiwan, ROC;2. Department of Mechanical Engineering, National Chung Hsing University, Taichung 402, Taiwan, ROC;1. Department of Mechanical Engineering, University Campus2, University of Guilan, Rasht, Iran;2. Faculty of Mechanical Engineering, University of Guilan, Rasht, Iran;3. Department of Mechanical Engineering, Yasouj University, Yasouj, Iran;1. Department of Mechanical Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli 620015, India;2. Department of Mechanical Engineering, K.L.N. College of Engineering, Madurai, India;1. College of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, 6 Xuefuzhong Road, Weiyangdaxueyuan district of Xi''an, 710021, China;2. Computational Fluid Dynamics Research Laboratory, Fundamental Research Institute of R&D Center, Loncin Motor Co. Ltd, Chong Qing, 400039, China;3. College of Mathematics and Computer Science, Yichun University, 336000, China |
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| Abstract: | In this study experiments were conducted to study the porous thin plate drying process. An analysis was also carried out to determine the moisture transfer coefficients that vary with the moisture content of the plate during drying. The study is useful for analyzing the transient drying process of porous thin plates. Furthermore, energy and exergetic analyses based on the measured results were carried out to determine the dryer performance. It is found that, although the drying rate increases, the energy utilization ratio of the drying process decreases with either an increase in the rate of air flow or an increase in the size of the drying air inlet. The results indicate that a significant amount of the energy provided to the system was lost and not utilized for drying, especially for high drying rate dryers. An exergetic analysis showed that by adjusting the configuration of the air inlet and flow rate, the exergetic efficiency of the dryer can be significantly increased (from 0.5% to 10%). An overall transport phenomena analysis and performance evaluation including the transient moisture transfer coefficients, drying rate, energy utilization ratio, and exergetic efficiency in the current study provide comprehensive and important insights to the thermal physics of porous thin plate drying processes and the design of efficient dryer systems. |
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