Determination of thermal and drying performances of the solar air dryer with solar tracking system: Apple drying test
| Autor: | Ebru Kavak Akpinar, Mehmet Daş |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Fluid Flow and Transfer Processes
Thermal efficiency Materials science Moisture 020209 energy Nuclear engineering 02 engineering and technology Heat transfer coefficient Thermal diffusivity 01 natural sciences 010406 physical chemistry 0104 chemical sciences Solar tracker Convective heat transfer coefficient Solar tracking system lcsh:TA1-2040 Thermal 0202 electrical engineering electronic engineering information engineering Activation energy Moisture diffusivity Thin layer drying models lcsh:Engineering (General). Civil engineering (General) Engineering (miscellaneous) Air dryer Collector thermal efficiency |
| Zdroj: | Case Studies in Thermal Engineering, Vol 21, Iss, Pp 100731-(2020) |
| Popis: | WOS:000567863000001 The present experimental study, the thermal performance of a solar air dryer with solar tracking system was investigated. Solar air collector (SAC) has been provided with solar tracking feature using a programmable logic control system that has not been used before. The SAC has been two-direction solar tracking feature with this system. The designed moving SAC was combined with a drying cabinet to obtain a solar air collector dryer (SACD). A fixed SACD, which is the same dimensions with the moving SACD, was designed to compare the performance of the moving SACD. In order to compare the thermal and the drying efficiencies of both systems, 14 mm thick apple slices were dried simultaneously. Depending on fan speed, in the moving and fixed SACD, the activation energy and effective moisture diffusivity values ranged from 0.062 x 10(-7) to 0.084 x 10(-7) m(2)/s and 33.2-40.01 kJ/mol and 0.031 x 10(-6) to 0.049 x 10(-6) m(2)/s and 16.4-22.9 kJ/mol, respectively. Convective heat transfer coefficient of apple slices showed changes in ranges 17.475-21.818 W/m(2)K in the moving SACD, and 13.215-20.846 W/m(2)K in the fixed SACD. The solar air collector thermal efficiency was calculated as 75.7% and 51.7% about in the moving and fixed SACD, respectively. |
| Databáze: | OpenAIRE |
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