Design and fabrication of a forced convection solar dryer integrated with heat storage materials

Design and fabrication of a forced convection solar dryer integrated with heat storage materials

Clement Adekunle Komolafe  Mufutau Adekojo Waheed 

Department of Mechanical Engineering, College of Engineering, Landmark University, P.M.B 1001, Omu Aran, Nigeria

Department of Mechanical Engineering, College of Engineering, Federal University of Agriculture, P.M.B 2240, Abeokuta, Nigeria

Corresponding Author Email:
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The purpose of this study was to designed and fabricated a 10 kg capacity forced convection solar dryer integrated with thermal energy storage materials, TSMA and TSMB, using locally sourced and low-cost materials for drying agricultural products. The dryer consists mainly of a well-insulated solar collector, drying chamber and photovoltaic components. The maximum collector and drying chamber temperatures obtained from three experiments at no-load conditions with two different thermal and without thermal energy storage materials were 86.2, 91.3 and 80.3 oC; and 67.8, 70.8 and 54 oC respectively, at the corresponding maximum solar radiations of 716.5, 810 and 724.7 W/m2. The recorded minimum drying chamber relative humidity of the solar dryer with TSMA, TSMB and without was 27, 24 and 23% respectively, and the corresponding ambient humidity was 70.8, 56.8 and 56.2%. A full load drying process using cocoa beans with TSMA took two full days, 10 hrs (58 hrs) to reduce initial moisture content of cocoa beans from 0.6 to 0.034 g water/g w.b. The maximum drying temperature and thermal efficiency obtained were 54 oC and 48.8% respectively. The dryer was thus viable for drying products within short time with little temperature control mechanism


drying, Solar dryer, Forced convection, Cocoa beans, Heat storage materials

1. Introduction
2. Materials and methods
3. Results and discussions
4. Conclusions

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