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Solar tunnel drier with thermal storage for drying of copra

Author

Listed:
  • S. Ayyappan
  • K. Mayilsamy

Abstract

A natural convection solar tunnel drier integrated with rock bed as sensible heat storage material was developed to test its performance for copra drying. The experiments were carried out with and without the integration of heat storage material. The temperature gradient inside the tunnel drier is about 10-25°C during the clear day and 7-12°C during off-sunshine hours, which is quite sufficient to dry agricultural commodities. The drier reduces the moisture content of copra from 52% (w.b.) to 7.1% (w.b.) in 54 hrs and 60 hrs respectively with and without the heat storage material. It produces 85% milling copra grade1 (MCG1). In open sun drying, moisture content reduces from 52.3% (w.b.) to about 7.1% in 153 hrs with an average of 53% MCG1. The average solar tunnel drier thermal efficiency estimated to be about 15%. The use of heat storage material increases the drier efficiency by 2% to 3%.

Suggested Citation

  • S. Ayyappan & K. Mayilsamy, 2012. "Solar tunnel drier with thermal storage for drying of copra," International Journal of Energy Technology and Policy, Inderscience Enterprises Ltd, vol. 8(1), pages 3-13.
    • Handle: RePEc:ids:ijetpo:v:8:y:2012:i:1:p:3-13
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    Cited by:

    1. Asim Ahmad & Om Prakash & Shailesh Kumar Sarangi & Prashant Singh Chauhan & Rajeshwari Chatterjee & Shubham Sharma & Raman Kumar & Sayed M. Tag & Abhinav Kumar & Bashir Salah & Syed Sajid Ullah, 2023. "Thermal and CFD Analyses of Sustainable Heat Storage-Based Passive Greenhouse Dryer Operating in No-Load Condition," Sustainability, MDPI, vol. 15(15), pages 1-21, August.
    2. 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).
    3. Anand, Sumeet & Mishra, Dipti Prasad & Sarangi, Shailesh Kumar, 2020. "CFD supported performance analysis of an innovative biomass dryer," Renewable Energy, Elsevier, vol. 159(C), pages 860-872.

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