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Multi-shelf portable solar dryer

Author

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  • Singh, Sukhmeet
  • Singh, Parm Pal
  • Dhaliwal, S.S

Abstract

The solar dryer reported in this paper was developed to enable farmers to add value to their produce by drying it at farm itself. It can also be used in cottage industries in remote places. The dryer has a multi-shelf design with intermediate heating, passive, integral, direct/indirect and portable solar dryer. Intermediate heating of air in-between trays results in uniform drying in all the trays. Since the dryer at the farm is not likely to be used throughout the year, it has been made portable. A novel feature of this dryer is that the product can be dried under shade or otherwise as per requirement. The design is low cost to make it economically viable. The maximum stagnation temperature was 75 °C in the month of November at Ludhiana (31°N). During experiments on drying of fenugreek leaves the moisture evaporation on first, second and third drying day was 1.4, 0.9 and 0.4 kg/m2 of aperture area. To overcome the problem of reduction in efficiency on second and third drying day, a semi-continuous mode of loading has been investigated, in which the efficiency remains almost the same on all drying days. The shelf life of the dried product is more than one year.

Suggested Citation

  • Singh, Sukhmeet & Singh, Parm Pal & Dhaliwal, S.S, 2004. "Multi-shelf portable solar dryer," Renewable Energy, Elsevier, vol. 29(5), pages 753-765.
    • Handle: RePEc:eee:renene:v:29:y:2004:i:5:p:753-765
    DOI: 10.1016/j.renene.2003.09.010
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    References listed on IDEAS

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    1. Hallak, H. & Hillal, J. & Hilal, F. & Rahhal, R., 1996. "The staircase solar dryer: Design and characteristics," Renewable Energy, Elsevier, vol. 7(2), pages 177-183.
    2. Arinze, E.A. & Sokhansanj, S. & Schoenau, G.J. & Ellis, Vic, 1996. "Design and experimental evaluation of a new commercial-type mobile solar grain dryer provided with high efficiency fined-plate collector," Renewable Energy, Elsevier, vol. 9(1), pages 670-675.
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    Cited by:

    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. 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.
    3. 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.
    4. 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.
    5. 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.
    6. 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.
    7. 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.
    8. Singh, Sukhmeet & Gill, R.S. & Hans, V.S. & Mittal, T.C., 2022. "Experimental performance and economic viability of evacuated tube solar collector assisted greenhouse dryer for sustainable development," Energy, Elsevier, vol. 241(C).
    9. Kumar, Mahesh & Sansaniwal, Sunil Kumar & Khatak, Pankaj, 2016. "Progress in solar dryers for drying various commodities," Renewable and Sustainable Energy Reviews, Elsevier, vol. 55(C), pages 346-360.

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