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Apparatus and method for investigation of energy consumption of microwave assisted drying systems

Rev. Sci. Instrum. 80, 104706 (2009); doi:10.1063/1.3250870

Published 29 October 2009

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Attila Göllei,1 András Vass,2 Attila Magyar,1 and Elisabeth Pallai2
1Department of Electrical Engineering and Information Systems, Faculty of Information Technology, University of Pannonia, Egyetem u. 10, H-8200 Veszprém, Hungary
2Faculty of Information Technology, Institute of Chemical and Process Engineering, University of Pannonia, Egyetem u. 2, H-8200 Veszprém, Hungary
Convective, hot air drying by itself is relatively efficient for removing water from the surface environment of agricultural seed products. However, moving internal moisture to the surface needs rather a long time, as a rule. The major research aim of the authors was to decrease the processing time and processing costs, to improve the quality of the dried product, and to increase drying efficiency. For this reason their research activities focused on the development of a special drying apparatus and a method suitable for measuring of energy conditions in a hybrid (microwave and convective) dryer. Experimental investigations were made with moistened wheat as model material. Experiments were carried out in microwave, convective and hybrid drying systems. The microwave drying alone was more efficient than the convective method. The lowest energy consumption and shortest drying time were obtained by the use of a hybrid method in which the waste energy of magnetron was utilized and the temperature was controlled. In this way, it was possible to keep the temperature of the dried product at a constant and safe value and to considerably decrease the energy consumption. ©2009 American Institute of Physics
History: Received 9 July 2009; accepted 27 September 2009; published 29 October 2009
Permalink: http://link.aip.org/link/?RSINAK/80/104706/1
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0034-6748 (print)   1089-7623 (online)
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