Simulation study of solar air collector with offset strip fin absorber plate for drying agricultural products in a semi-arid climate

Simulation study of solar air collector with offset strip fin absorber plate for drying agricultural products in a semi-arid climate

Abdelouahab BenseddikAhmed Azzi Rachid Khanniche Abdul K. Allaf 

Unité de Recherche Appliquée en Energies Renouvelables, URAER, Centre de Développement des Energies Renouvelables, CDER, 47133, Ghardaïa, Algeria

Unité de Recherche Matériaux et Energies Renouvelables (URMER), Faculté des Sciences, Université de Tlemcen, BP 119, Tlemcen 13000, Algeria

University of La Rochelle, Laboratory of Engineering Science for Environment (LaSIE) UMR 7356 CNRS - La Rochelle, France

Corresponding Author Email:
18 September 2017
| |
14 May 2018
| | Citation



In this current contribution, a parametric investigation of air flow rate at the inlets of solar air collector was carried out. Through a developed Matlab code effort was made to show the effect of the air flow rate on solar collector outlet temperature. From the simulation results a database of outlet temperature and corresponding flow rate variation with time was created. Then, isotherm contours were deduced and plotted. For drying temperature kept constant at a given value regardless the meteorological conditions fluctuation, the flow rate variation with time was fitted by smoothing spline function. The simulation study was done for three different meteorological scenarios: Clear sky day, partly cloudy day and cloudy day. It has been found also that drying with variable flow rate at optimum temperature equal to 50 ±1°C the amount of air that was aspired at the inlet was 1207.8 kg. By contrast, drying with constant flow rate a total 625.5kg of air was aspired and it might result in fluctuation in drying temperature which affects the dried product quality. Thus variable flow rate allows a gain ratio in the aspired air amount of 93% and better product quality. This is valid for clear sky day. In case of partly and cloudy day, flow rate gain ratio was 104% and 78% respectively.


solar drying, mathematical modeling, numerical simulation, parametric investigation, optimal air mass flow rate

1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusions

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