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Design parameters for a small-scale batch in-bin maize dryer

Agricultural Sciences 2013年第5期4卷 90-95页

作者： Fashina Adepoju Bola. Akande Fatai Bukola. Ibrahim Saula Olanrewaju sanusi bashir adisa Agricultural Engineering Department Ladoke Akintola University of Technology Ogbomoso Oyo State Agricultural Engineering Department The Polytechnic Ibadan Oyo State

Early season maize is harvested with high moisture content that makes it impossible to store. The sale of early season maize in green form is uneconomical to the farmer. Experience had shown that farmers could hardly make the cost of production from their sales. Also, grain losses are high when maize is harvested green. To minimize grain losses and thereby increase value and the profit margin of the farmer, a grain dryer is necessary for wet grains. Therefore, this paper presents the design and development of a batch in-bin maize grain dryer. Some properties of maize such as moisture content and bulk density were determined to get information required for design of the dryer. The dimension of drying chamber, amount of moisture to be removed in a batch, quantity of air required to effect drying, volume of air required to effect drying, blower capacity, quantity of heat required to effect drying and actual heat used to effect drying were all designed for. A maize dryer was developed with a batch size of100 kg of threshed wet maize. The dryer can be used in laboratory for experimental purpose as well as on the farm for commercial purposes. The dryer can be used to measure drying rates of maize at different initial moisture contents, drying air temperatures, drying air velocities and grain beds. The effects of different drying temperature, air velocity, loading and agitating speed on the quality of dried maize can be investigated with the dryer.

关键词： Design and Development In-bin Maize dryer Fresh Maize Grain Moisture Content Heat Transfer Drying Rate

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