Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1989-02-23
1990-06-05
Bennett, Henry A.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 46, 34 54, F26B 306
Patent
active
049302299
ABSTRACT:
A method and apparatus for the controlled aeration of stored grain is disclosed that provides for aeration of grain when ambient temperature and relative humidity levels are within a specified range of optimum levels. Available daily aeration time is selected by the operator and, if not used on a given day, is accumulated. Aeration of grain is initiated when the current ambient air temperature is within an acceptable range of the recent average air temperature, the equilibrium moisture content supported by the current air temperature and relative humidity levels is within an acceptable range of the desired grain moisture content and the available aeration time has not been used up. Long periods between aeration are avoided by progressively widening the range of acceptable current ambient air temperature and equilibrium moisture content levels when less than a predetermined amount of aeration has occurred. The method takes into account the actual average ambient temperature over specified short term and long term periods, and lowers the acceptable ambient temperature range for aeration of the stored grain by a specified offset from the range normally used, when the short term average ambient temperature is a specified amount lower than the long term average ambient temperature, signifying onset of a cooler season. The apparatus disclosed provides for continuous monitoring of ambient atmospheric conditions, and initiates aeration of stored grain automatically, in accordance with the inventive method, without continuous operator involvement.
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Natural Air and Low Heat Grain Drying and Storage Controller, Duane L. Bollwitt (The Bollwitt Co., Inc.), Jan. 25, 1983, Monticello, Ia.
Programmable Control for Drying and Aeration, Gleelyn W. Persson (Pertek, Inc.), Robert W. Churchill (Hartrun Corporation), date and place of publication unknown.
Pertek, Inc., 2 page sales brochure, author, date and place of publication unknown.
Bennett Henry A.
Sentry Technologies, Inc.
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