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 calculated based on the difference between grain temperature and recent average air temperature and, if not used in 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.

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. Aeration of grain is initiated when both the current ambient air temperature is within an acceptable range of the recent average air temperature, and 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. 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 also provides for the maintenance of a uniform temperature within the stored grain, and assists in avoiding extreme storage temperatures.

Abstract: An improved grain drying and storage bin of the type having side walls and a perforated floor defining a plenum chamber and a grain drying and storage chamber and an improved fan mounting therefor. The fan mounting arrangement includes an opening in the sidewall, a fan mounted with a portion above the level of the perforated floor, an angled housing extending from the top of the opening to the perforated floor and a plurality of vanes disposed on the interior surface of the housing to direct the air upwardly and outwardly into the grain drying and storage chamber.

Abstract: A floor support for supporting a perforated floor in a grain drying and storage bin of the type having a plenum chamber and a grain drying and storage chamber. The floor support includes a plurality of floor support members each comprising at least three vertically disposed tubular members joined together near their tops and bottoms by a pair of horizontally disposed brace members.