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A review on applications of greenhouse drying and its performance CIGR Journal
Sahdev, Ravinder Kumar; Kumar, Mahesh; Dhingra, Ashwani Kumar.
Limited sources and rising cost of fossil fuels has instigated researchers to look towards renewable energy resources.  Among renewable energy resources, solar energy is required to become indispensable in the future, as it is inexpensive, abundant, inexhaustible, environmental friendly and non-pollutant.  Most of the people living in developing countries are dependent on agriculture.  Agricultural products are dried to increase the storage life, minimize the packaging requirement and reduce the transportation weight.  Solar drying for drying agricultural products is being practiced since long back throughout the world.  Because of its drawbacks, advance technique, i.e. greenhouse drying, is being adopted for drying crops to reduce the drying time and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Greenhouse drying; Agricultural products; Convective heat transfer coefficient; Energy and exergy analysis; Economical aspects; Drying performance.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3530
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Development of empirical expression for thin layer groundnut drying under open sun and forced convection modes CIGR Journal
Sahdev, Ravinder Kumar; Kumar, Mahesh; Dhingra, Ashwani Kumar.
The thin layer drying behaviour of groundnut was investigated under open sun drying (OSD) and indoor forced convection drying (IFCD) modes. The groundnut samples were dried from initial moisture content of 38% (w.b.) to the safe storage moisture content of 8-10% (w.b.). Four mathematical models were compared for describing the groundnut drying process. The performance of thin layer drying models was investigated by comparing the statistical parameters such as coefficient of correlation (R), reduced chi-square (χ2), root mean square error (RMSE), and mean bias error (MBE) between experimental and predicted moisture ratios. Henderson and Pabis model was observed to give the highest value of R and lowest values of χ2, RMSE and MBE for the groundnut drying...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Groundnut/Peanut; Thin layer; Mathematical modelling; Open sun drying; Indoor forced convection drying; Moisture ratio.
Ano: 2018 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4216
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Experimental free convection thin layer groundnut greenhouse drying CIGR Journal
Kumar, Mahesh; Sahdev, Ravinder Kumar; Tiwari, Sumit; Panchal, Hitesh; Manchanda, Himanshu.
The groundnuts were dried inside an even span roof type free convection greenhouse dryer with a useful floor area of 1.2×0.8 m2 in the environmental conditions of Rohtak, India (28o54’ N 76o34’E). Wire mesh sieves of sizes 0.15×0.25 m2, 0.25×0.4 m2,and 0.35×0.6 m2 were used to accommodate thin layer samples of groundnuts. The groundnuts were dried till the optimum safe moisture storage level (8–10%) was attained. Based on experimental (hourly) observations the values of constants (C and n) in the equation of Nusselt number were evaluated. The values of convective and evaporative heat transfer coefficients were calculated which were observed to decrease with the increase in the sieve size. The overall average greenhouse thermal, energy, and exergy...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Groundnut/peanut; Greenhouse drying; Convective heat transfer coefficient; Evaporative heat transfer coefficient; Free convection..
Ano: 2019 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5325
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Present status of peanuts and progression in its processing and preservation techniques CIGR Journal
Sahdev, Ravinder Kumar.
Peanut or groundnut is one of the major oilseed crops in the world. It is rich in oil and proteins. Developing countries account for about 95% of the world peanut production. Asia alone accounts for 70% of this amount where the major producers India and China together represent over two-third of global output. Traditionally, groundnuts are dried in open sun to its safe moisture level for storage. Natural and artificial (hot air drying) drying methods of groundnuts are being used throughout the world. Artificial peanuts drying devices consume very large amount of energy. In this paper, present status of peanut and a comprehensive review of its drying methods are discussed. Recent developments in preservation and storage of groundnuts are also highlighted.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Groundnut/Peanut; Peanut Drying; Peanut preservation; Peanut Storage; Moisture content; Curing..
Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3289
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