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Poster De Conférence Année : 2017

Modeling of a thermal collector for indirect solar dryer with oriented air flow and heat storage

Résumé

In the developing countries, post-harvest losses are important, especially in rural zones. Solar drying is considered as the best way to reduce these losses. An indirect solar dryer with air flow oriented is designed and produced as part of this work. It provides the ability to store energy for continuous drying and to vary the orientation of the flow of heat air in the drying chamber. This work predicts the outlet air temperature at the thermal collector in the two cases of configuration which are the single-face and bifacial mode of collector. The heat balance applied to each element of the collector is determined taking into account the temporal term which characterizes storage in the material and the simulation is done using Matlab and Simulink software. Both models of the collector are validated by comparing the experimental and theoretical curves. The results show that the two curves of outlet air temperatures have the same profile when the global heat transfer coefficient loss is 2.94 W.m-2 .K-1 , the contact resistance between the absorber and the insulator is 0,025 W-1 .m 2 .K and velocity of heated air is 0.2m.s-1. The contact resistance has a significant influence on the temperature of outlet air of the collector but not accessible compared to the speed of inlet air that is accessible and sensitive for controlling the output temperature of the collector of an indirect solar dryer.
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Dates et versions

hal-02352918 , version 1 (12-11-2019)

Identifiants

  • HAL Id : hal-02352918 , version 1

Citer

G B Tchaya, Martin Kamta, Michel Havet, César Kapseu. Modeling of a thermal collector for indirect solar dryer with oriented air flow and heat storage. 10th European Congress of Chemical Engineering (ECCE10), Sep 2017, Nice, France. ⟨hal-02352918⟩
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