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Solar Drying: Fundamentals,Applications and Innovations - National ...

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Aware <strong>and</strong> Thorat - <strong>Solar</strong> <strong>Drying</strong> of Fruits <strong>and</strong> Vegetables<br />

agricultural products on a large scale would be a boon to small <strong>and</strong> marginal farmers.<br />

Among the different types of solar dryers, the indirect mode forced convection solar<br />

dryer has been demonstrate to be superior in the speed <strong>and</strong> quality of drying. Incorporation<br />

of sensible <strong>and</strong>/or latent heat storage media within the solar drying systems accelerate<br />

the drying process during the night time <strong>and</strong> low intensity solar radiation periods<br />

<strong>and</strong> exclude the need for using auxiliary heat sources during low solar radiation seasons.<br />

<strong>Solar</strong> drying of agricultural products appears to be financially quite attractive for cash<br />

crops (such as tea, cardamom, turmeric, ginger etc.) However, for drying highly perishable<br />

products such as fruits <strong>and</strong> vegetables, it is extremely important to develop low cost<br />

solar drying system preferably using local materials <strong>and</strong> skills. To improve the acceptability<br />

of solar dryers among the farmers, it is necessary to develop a large scale solar<br />

dryer, which is economically attractive.<br />

REFERENCES<br />

Ahmed, J., Shivhare, U.S., Singh, G., 2001, <strong>Drying</strong> Characteristics <strong>and</strong> Product Quality<br />

of Cori<strong>and</strong>er Leaves. Food <strong>and</strong> Bioproducts Processing, 79, pp. 103–106.<br />

Aktas, T., Yamamoto, S., Fujii, S., 2004, Effects of Pre-Treatments on Rehydration<br />

Properties <strong>and</strong> Microscopic Structure Changes of Dried Vegetables, Japan Journal of Food<br />

Engg, 5, pp. 267–272.<br />

Aktas, T., Fujii, S., Kawano, Y., Yamamoto, S., 2007, Effects of Pretreatments of Sliced<br />

Vegetables with Trehalose on <strong>Drying</strong> Characteristics <strong>and</strong> Quality of Dried Products, Food<br />

<strong>and</strong> Bioproducts Processing, Trans IChemE, Part C, pp. 178-183.<br />

An-Erl King, V., Liu, C.-F., Liu, Y.-J., 2001, Chlorophyll stability in spinach dehydrated<br />

by freeze-drying <strong>and</strong> controlled low-temperature vacuum dehydration, Food Research<br />

International, 34(2-3), pp. 167-175.<br />

Aware, R.S., Thorat B. N., 2011, Garlic Under Various <strong>Drying</strong> Study <strong>and</strong> Its Impact on<br />

Allicin Retention, <strong>Drying</strong> Technology, 29, pp. 1510–1518.<br />

Bhat, N.R., Desai, B.B., Suleiman, M.K., 2006, Grapes <strong>and</strong> Raisins, H<strong>and</strong>book of Fruits<br />

<strong>and</strong> Fruit processing, Blackwell publishing.<br />

Bialobrzewski, I., Markowski M., 2004, Mass Transfer in The Celery Slice: Effects of<br />

Temperature, Moisture Content, <strong>and</strong> Density on Water Diffusivity, <strong>Drying</strong> Technology, 22,<br />

pp. 1777–1789.<br />

Doymaz, I., 2006, <strong>Drying</strong> kinetics of black grapes treated with different solutions,<br />

Journal of Food Engineering, 76(2), pp. 212-217.<br />

Ekechukwu, O.V., Norton, B., 1997, Design <strong>and</strong> measured performance of a solar<br />

chimney for natural-circulation solar-energy dryers, Renewable Energy, 10(1), pp. 81-<br />

90.<br />

Fadhel, A., Kooli, S., Farhat, A., Bellghith, A., 2005, Study of the <strong>Solar</strong> <strong>Drying</strong> of Grapes<br />

by Three Different Processes, Desalination, 185, pp. 535– 541.<br />

Funebo, T., Ohlsson, T., 1998, Microwave-Assisted Air Dehydration of Apple <strong>and</strong> Mushroom,<br />

Journal of Food Engineering, 38, pp. 353- 367.<br />

68 <strong>Drying</strong> of Foods, Vegetables <strong>and</strong> Fruits

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