Comparative Energy Audit of Mixed-Mode and Direct Mode Solar Grain Dryers

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2016 by IJETT Journal
Volume-37 Number-1
Year of Publication : 2016
Authors : Ikem Azorshubel Ikem, Oku E. Nyong, D. Osim-Asu, Stephen A. Takim
DOI :  10.14445/22315381/IJETT-V37P209


Ikem Azorshubel Ikem, Oku E. Nyong, D. Osim-Asu, Stephen A. Takim"Comparative Energy Audit of Mixed-Mode and Direct Mode Solar Grain Dryers", International Journal of Engineering Trends and Technology (IJETT), V37(1),37-46 July 2016. ISSN:2231-5381. published by seventh sense research group

This work presents a thermodynamic comparison of two locally designed dryers, the direct and mixedmode solar dryers. The materials used for the construction of the dryers were locally sourced and used for drying restaurant wastes. The mixed-mode dryer (MSD) is made up of flat-plat collector and a drying chamber while the direct (DSD) has double glazed glass as collector. The properties of air which serve as the working fluid were measured at the entrance and exit points of the dryers. The balanced energy equations were developed for each segment of the dryers. They are the based on solar dryers. The compared results show better energy efficiency and product quality of the MSD over the DSD. The results can be used by farmers to select solar grain dryers for specific jobs.


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thermodynamic comparison; restaurant wastes, solar dryers, flat-plate collector.