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Experimental investigation of a solar dryer with natural convective heat flow

Author

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  • Gbaha, P.
  • Yobouet Andoh, H.
  • Kouassi Saraka, J.
  • Kaménan Koua, B.
  • Touré, S.

Abstract

A direct type natural convection solar dryer is designed. It is constructed in local materials (wood, blades of glass, metals) then tested experimentally in foodstuffs drying (cassava, bananas, mango). It is about an experimental approach which consists in analyzing the behavior of the dryer. The study relates mainly kinetics and establishment of drying heat balances. The influence of significant parameters governing heat and mass transfers, such as solar incident radiation, drying air mass flow and effectiveness, is analyzed in order to evaluate its thermal performances. Experimental data can be represented by empirical correlations of the form M(t)=Miexp(−kt) for representation of drying process. The resolution of these drying equations makes-possible to predict total drying time of each product. Moreover, this drying process allows to reduce the moisture content of cassava and sweet banana approximately to 80% in 19 and 22h, respectively to reach the safety threshold value of 13%. This value permits the conservation of these products about one year without deterioration. The determination of parameters, like ambient temperature, drying chamber temperature, drying air mass flow and incident heat fluxes, allow to predict the drying effectiveness for modeling and refining the dimensioning of the elaborate prototype.

Suggested Citation

  • Gbaha, P. & Yobouet Andoh, H. & Kouassi Saraka, J. & Kaménan Koua, B. & Touré, S., 2007. "Experimental investigation of a solar dryer with natural convective heat flow," Renewable Energy, Elsevier, vol. 32(11), pages 1817-1829.
    • Handle: RePEc:eee:renene:v:32:y:2007:i:11:p:1817-1829
    DOI: 10.1016/j.renene.2006.10.011
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    References listed on IDEAS

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    1. Ben Mabrouk, S. & Belghith, A., 1994. "Simulation and design of a tunnel drier," Renewable Energy, Elsevier, vol. 5(1), pages 469-473.
    2. Hachemi, A., 1999. "Experimental study of thermal performance of offset rectangular plate fin absorber-plates," Renewable Energy, Elsevier, vol. 17(3), pages 371-384.
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    1. Fudholi, A. & Sopian, K. & Ruslan, M.H. & Alghoul, M.A. & Sulaiman, M.Y., 2010. "Review of solar dryers for agricultural and marine products," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(1), pages 1-30, January.
    2. Mustayen, A.G.M.B. & Mekhilef, S. & Saidur, R., 2014. "Performance study of different solar dryers: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 34(C), pages 463-470.
    3. Guo, Shaopeng & Liu, Qibin & Sun, Jie & Jin, Hongguang, 2018. "A review on the utilization of hybrid renewable energy," Renewable and Sustainable Energy Reviews, Elsevier, vol. 91(C), pages 1121-1147.
    4. VijayaVenkataRaman, S. & Iniyan, S. & Goic, Ranko, 2012. "A review of solar drying technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(5), pages 2652-2670.
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    6. Dissa, A.O. & Bathiebo, J. & Kam, S. & Savadogo, P.W. & Desmorieux, H. & Koulidiati, J., 2009. "Modelling and experimental validation of thin layer indirect solar drying of mango slices," Renewable Energy, Elsevier, vol. 34(4), pages 1000-1008.
    7. Koua, Kamenan Blaise & Fassinou, Wanignon Ferdinand & Gbaha, Prosper & Toure, Siaka, 2009. "Mathematical modelling of the thin layer solar drying of banana, mango and cassava," Energy, Elsevier, vol. 34(10), pages 1594-1602.
    8. Natarajan, Karunaraja & Thokchom, Subhaschandra Singh & Verma, Tikendra Nath & Nashine, Prerana, 2017. "Convective solar drying of Vitis vinifera &Momordica charantia using thermal storage materials," Renewable Energy, Elsevier, vol. 113(C), pages 1193-1200.
    9. Chen, Wei & Qu, Man, 2014. "Analysis of the heat transfer and airflow in solar chimney drying system with porous absorber," Renewable Energy, Elsevier, vol. 63(C), pages 511-518.
    10. Sandali, Messaoud & Boubekri, Abdelghani & Mennouche, Djamel & Gherraf, Noureddine, 2019. "Improvement of a direct solar dryer performance using a geothermal water heat exchanger as supplementary energetic supply. An experimental investigation and simulation study," Renewable Energy, Elsevier, vol. 135(C), pages 186-196.
    11. Yahya, M. & Fudholi, Ahmad & Sopian, Kamaruzzaman, 2017. "Energy and exergy analyses of solar-assisted fluidized bed drying integrated with biomass furnace," Renewable Energy, Elsevier, vol. 105(C), pages 22-29.
    12. Nadir, Nadia & Bouguettaia, Hamza & Boughali, Slimane & Bechki, Djamel, 2019. "Use of a new agricultural product as thermal insulation for solar collector," Renewable Energy, Elsevier, vol. 134(C), pages 569-578.
    13. Ndukwu, M.C. & Onyenwigwe, D. & Abam, F.I. & Eke, A.B. & Dirioha, C., 2020. "Development of a low-cost wind-powered active solar dryer integrated with glycerol as thermal storage," Renewable Energy, Elsevier, vol. 154(C), pages 553-568.
    14. Thirugnanasambandam, Mirunalini & Iniyan, S. & Goic, Ranko, 2010. "A review of solar thermal technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(1), pages 312-322, January.
    15. Boroze, Tchamye & Desmorieux, Hélène & Méot, Jean-Michel & Marouzé, Claude & Azouma, Yaovi & Napo, Kossi, 2014. "Inventory and comparative characteristics of dryers used in the sub-Saharan zone: Criteria influencing dryer choice," Renewable and Sustainable Energy Reviews, Elsevier, vol. 40(C), pages 1240-1259.
    16. EL-Mesery, Hany S. & EL-Seesy, Ahmed I. & Hu, Zicheng & Li, Yang, 2022. "Recent developments in solar drying technology of food and agricultural products: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 157(C).
    17. Bahrehmand, D. & Ameri, M., 2015. "Energy and exergy analysis of different solar air collector systems with natural convection," Renewable Energy, Elsevier, vol. 74(C), pages 357-368.

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