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Performance of a solar dryer using hot air from roof-integrated solar collectors for drying herbs and spices

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  • Janjai, S.
  • Tung, P.

Abstract

A solar dryer for drying herbs and spices using hot air from roof-integrated solar collectors was developed. The dryer is a bin type with a rectangular perforated floor. The bin has a dimension of 1.0m×2.0m×0.7m. Hot air is supplied to the dryer from fiberglass-covered solar collectors, which also function as the roof of a farmhouse. The total area of the solar collectors is 72m2. To investigate its performance, the dryer was used to dry four batches of rosella flowers and three batches of lemon-grasses during the year 2002–2003. The dryer can be used to dry 200kg of rosella flowers and lemon-grasses within 4 and 3 days, respectively. The products being dried in the dryer were completely protected from rains and insects and the dried products are of high quality. The solar air heater has an average daily efficiency of 35% and it performs well both as a solar collector and a roof of a farmhouse.

Suggested Citation

  • Janjai, S. & Tung, P., 2005. "Performance of a solar dryer using hot air from roof-integrated solar collectors for drying herbs and spices," Renewable Energy, Elsevier, vol. 30(14), pages 2085-2095.
    • Handle: RePEc:eee:renene:v:30:y:2005:i:14:p:2085-2095
    DOI: 10.1016/j.renene.2005.02.006
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    1. Bala, B.K. & Mondol, M.R.A. & Biswas, B.K. & Das Chowdury, B.L. & Janjai, S., 2003. "Solar drying of pineapple using solar tunnel drier," Renewable Energy, Elsevier, vol. 28(2), pages 183-190.
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    1. Yahya, M. & Rachman, Arfidian & Hasibuan, R., 2022. "Performance analysis of solar-biomass hybrid heat pump batch-type horizontal fluidized bed dryer using multi-stage heat exchanger for paddy drying," Energy, Elsevier, vol. 254(PB).
    2. 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.
    3. Assoa, Ya Brigitte & Sauzedde, François & Boillot, Benjamin, 2018. "Numerical parametric study of the thermal and electrical performance of a BIPV/T hybrid collector for drying applications," Renewable Energy, Elsevier, vol. 129(PA), pages 121-131.
    4. 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.
    5. 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.
    6. Makki, Adham & Omer, Siddig & Sabir, Hisham, 2015. "Advancements in hybrid photovoltaic systems for enhanced solar cells performance," Renewable and Sustainable Energy Reviews, Elsevier, vol. 41(C), pages 658-684.
    7. 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.
    8. 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.
    9. Kareem, M.W. & Habib, Khairul & Ruslan, M.H. & Saha, Bidyut Baran, 2017. "Thermal performance study of a multi-pass solar air heating collector system for drying of Roselle (Hibiscus sabdariffa)," Renewable Energy, Elsevier, vol. 113(C), pages 281-292.
    10. Nabnean, S. & Janjai, S. & Thepa, S. & Sudaprasert, K. & Songprakorp, R. & Bala, B.K., 2016. "Experimental performance of a new design of solar dryer for drying osmotically dehydrated cherry tomatoes," Renewable Energy, Elsevier, vol. 94(C), pages 147-156.
    11. Ibrahim, Adnan & Othman, Mohd Yusof & Ruslan, Mohd Hafidz & Mat, Sohif & Sopian, Kamaruzzaman, 2011. "Recent advances in flat plate photovoltaic/thermal (PV/T) solar collectors," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(1), pages 352-365, January.
    12. Assoa, Ya Brigitte & Sauzedde, François & Boillot, Benjamin & Boddaert, Simon, 2017. "Development of a building integrated solar photovoltaic/thermal hybrid drying system," Energy, Elsevier, vol. 128(C), pages 755-767.
    13. Román, Franz & Nagle, Marcus & Leis, Hermann & Janjai, Serm & Mahayothee, Busarakorn & Haewsungcharoen, Methinee & Müller, Joachim, 2009. "Potential of roof-integrated solar collectors for preheating air at drying facilities in Northern Thailand," Renewable Energy, Elsevier, vol. 34(7), pages 1661-1667.
    14. Janjai, S. & Srisittipokakun, N. & Bala, B.K., 2008. "Experimental and modelling performances of a roof-integrated solar drying system for drying herbs and spices," Energy, Elsevier, vol. 33(1), pages 91-103.
    15. Oztop, Hakan F. & Bayrak, Fatih & Hepbasli, Arif, 2013. "Energetic and exergetic aspects of solar air heating (solar collector) systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 21(C), pages 59-83.

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