DRYING POTENTIAL OF MAIZE GRAINS IN BULK WITH NATURAL AIR IN BOTUCATU, SP
Keywords:
Drying, Ambient air, Corn, Equilibrium moisture contentAbstract
Grain drying using ambient was simulated under weather conditions in Botucatu. Hourly weather records, fry bulb temperature and relative humidity, from 1971 through 1975 and from 1977 through 1981, were used to calculate adiabatic drying potential of the ambient air. Historical weather records from 1971 were selected to simulate ambient air corn drying. Ambient air corn drying systems operating continuously are not feasible to reduce the moisture content of the grain to the moisture levels recommended for safe storage. Selective fan operation, from 9 a. m. to 5 a. m. , from 9 a. m. to 6 p. m. and from 8 a. m. to 6 p. m. , indicates the possibility to reduce corn moisture contents, wet basis, to levels between 12.1 and 17.3 percent for 22 percent initial moisture content, between 12.4 and 15.5 percent for 20 percent initial moisture content and between 13.1 and 14.7 percent for 18 percent initial moisture content, when corn is dried within allowable storage period.
KEY-WORDS: Drying; Ambient air; Corn; Equilibrium moisture content.
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