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Solar drying of sweet pepper and garlic using the tunnel greenhouse drier

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  • Condorı́, M
  • Echazú, R
  • Saravia, L

Abstract

A new low cost design for a forced convection greenhouse drier, the Tunnel Greenhouse Drier, has been built and tested. Its main parts are: a plastic greenhouse cover containing a drying tunnel made with transparent plastic walls; a line of carts with several stacked trays containing the product and moved manually inside the tunnel and an electrical fan that moves the hot air from the greenhouse into the tunnel. The trays receive solar radiation through the transparent walls, increasing the product temperature. Heat losses from the tunnel are low since greenhouse temperatures are higher than ambient temperature. The main advantages of this drier are: (a) an almost continuous production since some carts with dried product come out of the tunnel every day, while the same amount of fresh product is introduced by the other tunnel extreme; (b) lower labor cost since the product handling is partly mechanized; (c) a conventional heater can be easily installed to keep a constant production rate; (d) the energy consumption is lower than in other drier types; (e) the installation can be used as a greenhouse for small production when it is not used as a drier. The prototype was built in the North of Argentina, and red sweet pepper and garlic were used as load. The drier thermal efficiency, considered as a solar collector, was calculated using the measured experimental data, and a linear relation between the drier temperature and the solar radiation was obtained.

Suggested Citation

  • Condorı́, M & Echazú, R & Saravia, L, 2001. "Solar drying of sweet pepper and garlic using the tunnel greenhouse drier," Renewable Energy, Elsevier, vol. 22(4), pages 447-460.
    • Handle: RePEc:eee:renene:v:22:y:2001:i:4:p:447-460
    DOI: 10.1016/S0960-1481(00)00098-7
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    References listed on IDEAS

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    1. Condorí, Miguel & Saravia, Luis, 1998. "The performance of forced convection greenhouse driers," Renewable Energy, Elsevier, vol. 13(4), pages 453-469.
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    1. ELkhadraoui, Aymen & Kooli, Sami & Hamdi, Ilhem & Farhat, Abdelhamid, 2015. "Experimental investigation and economic evaluation of a new mixed-mode solar greenhouse dryer for drying of red pepper and grape," Renewable Energy, Elsevier, vol. 77(C), pages 1-8.
    2. 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.
    3. Sharma, Atul & Chen, C.R. & Vu Lan, Nguyen, 2009. "Solar-energy drying systems: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 13(6-7), pages 1185-1210, August.
    4. Tiwari, Sumit & Tiwari, G.N. & Al-Helal, I.M., 2016. "Development and recent trends in greenhouse dryer: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 65(C), pages 1048-1064.
    5. García-Valladares, O. & Ortiz, N.M. & Pilatowsky, I. & Menchaca, A.C., 2020. "Solar thermal drying plant for agricultural products. Part 1: Direct air heating system," Renewable Energy, Elsevier, vol. 148(C), pages 1302-1320.
    6. Rabha, D.K. & Muthukumar, P. & Somayaji, C., 2017. "Experimental investigation of thin layer drying kinetics of ghost chilli pepper (Capsicum Chinense Jacq.) dried in a forced convection solar tunnel dryer," Renewable Energy, Elsevier, vol. 105(C), pages 583-589.
    7. Asim Ahmad & Om Prakash & Anil Kumar & Rajeshwari Chatterjee & Shubham Sharma & Vineet Kumar & Kushagra Kulshreshtha & Changhe Li & Elsayed Mohamed Tag Eldin, 2022. "A Comprehensive State-of-the-Art Review on the Recent Developments in Greenhouse Drying," Energies, MDPI, vol. 15(24), pages 1-42, December.
    8. Husham Abdulmalek, Shaymaa & Khalaji Assadi, Morteza & Al-Kayiem, Hussain H. & Gitan, Ali Ahmed, 2018. "A comparative analysis on the uniformity enhancement methods of solar thermal drying," Energy, Elsevier, vol. 148(C), pages 1103-1115.
    9. Murthy, M.V. Ramana, 2009. "A review of new technologies, models and experimental investigations of solar driers," Renewable and Sustainable Energy Reviews, Elsevier, vol. 13(4), pages 835-844, May.
    10. Janjai, Serm & Intawee, Poolsak & Kaewkiew, Jinda & Sritus, Chanoke & Khamvongsa, Vathsana, 2011. "A large-scale solar greenhouse dryer using polycarbonate cover: Modeling and testing in a tropical environment of Lao People’s Democratic Republic," Renewable Energy, Elsevier, vol. 36(3), pages 1053-1062.
    11. Chauhan, Prashant Singh & Kumar, Anil & Nuntadusit, Chayut, 2018. "Heat transfer analysis of PV integrated modified greenhouse dryer," Renewable Energy, Elsevier, vol. 121(C), pages 53-65.
    12. Morad, M.M. & El-Shazly, M.A. & Wasfy, K.I. & El-Maghawry, Hend A.M., 2017. "Thermal analysis and performance evaluation of a solar tunnel greenhouse dryer for drying peppermint plants," Renewable Energy, Elsevier, vol. 101(C), pages 992-1004.
    13. Eltawil, Mohamed A. & Azam, Mostafa M. & Alghannam, Abdulrahman O., 2018. "Solar PV powered mixed-mode tunnel dryer for drying potato chips," Renewable Energy, Elsevier, vol. 116(PA), pages 594-605.
    14. Li, Zhimin & Zhong, Hao & Tang, Runsheng & Liu, Tao & Gao, Wenfeng & Zhang, Yue, 2006. "Experimental investigation on solar drying of salted greengages," Renewable Energy, Elsevier, vol. 31(6), pages 837-847.
    15. Prakash, Om & Kumar, Anil, 2014. "Solar greenhouse drying: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 29(C), pages 905-910.

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