Traditionally most grain is stored in circular type bins which provide a convenient means for handling and management. With the excess grain production and government loan programs of the past few years, some producers have used rectangular structures and covered piles to complement their round storages. The recommended management practices used with round bins are still required in those alternative storages and may be more critical in obtaining a quality end product.

One such recommended practice used with round bins is aeration. This practice is used to maintain a uniform temperature in the grain mass, preventing condensation and "hot" spots from occurring in the bins. For grain stored in piles and rectangular structures, aeration is generally conducted using above floor or flush mounted duct systems. The design of these systems is dependent on several factors including the configuration of the grain mass, the design airflow rate and grain volume and duct spacing criteria that will provide a relatively uniform distribution of air throughout the grain mass. The objective of this paper is to present a computer model that will determine duct sizes and duct spacing for aeration of rectangular storages based on system design requirements specified by the user. The model will be developed for use on the personal computer and should provide a useful design tool for extension engineers.

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Published in Transactions of the ASAE, v. 31, issue 4, p. 1283-1288.

© 1988 American Society of Agricultural Engineers

The copyright holder has granted the permission for posting the article here.

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This work is published with the approval of the Director of the Kentucky Experiment Station and designated as Paper No. 87-2-264.