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Download RAW file: https://library.csbe-scgab.ca/docs/journal/39/39_4_297_raw.pdf
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A control algorithm for near-ambient drying of stored wheat with variable airflows was slightly modified to improve its performance under the Canadian Prairie climate and to facilitate the application of the algorithm in a field situation. The original algorithm was designed to take advantage of large diurnal variations in relative humidity and to respond to the overall yearly weather patterns. Changes were made to the stop conditions of the algorithm, to the reference fixed airflow, and to the airflow range. Optimal controllin~ parameters for the algorithm and a new fixed airflow of 26 L.s-1 ? .were determined by repeatedly running computer simulations using 30 years of Winnipeg weather data (1961 -1990). Using the optimized controlling parameters with the modified algorithm resulted in a 30 year mean overall cost of drying of 1.1 I Can$/t of wheat, compared with 2.28 Can$/t using the original algorithm and 2.94 Can$/t using a fixed airflow of 26 L.s- I ? .- I . Cost savings were the result of reduced overdrying and electrical energy costs. The spoilage index and the allowable time for drying were not exceeded using the new control algorithm in all 30 years of simulations.

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Citation: D.A. Epp. D.S. Jayas. W.E. Muir. N.D.G. While and D. St. George 1997. NEAR-AMBIENT DRYING OF STORED WHEAT USING VARIABLE AIRFLOWA SIMULATION STUDY. Canadian Agricultural Engineering 39(4):297-302.
Volume: 39
Issue: 4
Pages -
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Date: 1997
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Coverage: Canada
Language 1: en
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Rights: Canadian Society for Bioengineering
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