Thin-layer rewetting rates of canola (Brassica campestris L.)
| dc.contributor.author | Shatadal, Pankaj | en_US |
| dc.date.accessioned | 2009-12-03T19:13:30Z | |
| dc.date.available | 2009-12-03T19:13:30Z | |
| dc.date.issued | 1989 | en_US |
| dc.degree.discipline | Agricultural Engineering | en_US |
| dc.degree.level | Master of Science (M.Sc.) | en_US |
| dc.description.abstract | Thin-layer rewetting tests were conducted for seeds of canola (Brassica campestris L.) in the temperature range of 7.5*C to 30.0*C at two relative humidities (80 and 90%) using a thin-layer wetting unit. Separate tests were done at 5.0, 7.0 and 10.0% initial moisture contents of seeds and 0.10, 0.25, and 0.43 m/s air velocities while the air was maintained at 30*C and 90% relative humidity. In the tests, a thin-layer (one to two kernels thick) of canola was held in the vertical plane and the conditioned air was passed through the layer, thus fully exposing the thin-layer of canola to the air. The gain in the mass of the thin-layer of canola with time was recorded using a micro-computer-based data acquisition system. The liquid diffusion equation for an isotropic and homogeneous sphere did not describe the rewetting rate of canola satisfactorily. The thin-layer rewetting rate data agreed well with Page's equation. The parameter n in Page's equation was assumed as a product-dependent constant which made it easy to compare the effects of independent variables on the rewetting rate without causing considerable error in predicting the rewetting rate for canola. A linear relationship was found between the parameter k, temperature and relative humidity. The initial moisture content, in the range from 5 to 10% wet mass basis, had no significant effect (p > 0.05) on the rewetting rate. The rewetting rate did not change significantly with air velocity in the range from 0.25 to 0.43 m/s (p > 0.05). The rewetting rate, however, was slower at 0.10 m/s air velocity. The thin-layer wetting model developed in this study will be of importance in predicting seed moisture changes during near-ambient air drying of bulks of canola. | en_US |
| dc.format.extent | viii, 104 leaves : | en_US |
| dc.format.extent | 3431046 bytes | |
| dc.format.mimetype | application/pdf | |
| dc.identifier | ocm72754018 | en_US |
| dc.identifier.uri | http://hdl.handle.net/1993/3603 | |
| dc.language.iso | eng | en_US |
| dc.rights | open access | en_US |
| dc.rights | The reproduction of this thesis has been made available by authority of the copyright owner solely for the purpose of private study and research, and may only be reproduced and copied as permitted by copyright laws or with express written authorization from the copyright owner. | en_US |
| dc.title | Thin-layer rewetting rates of canola (Brassica campestris L.) | en_US |
| dc.type | master thesis | en_US |
| local.subject.manitoba | yes | en_US |
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