Methodology for assessing the grain mass thermal effusivity in a metal silo under the influence of active ventilation

I A Kechkin,V A Ermolaev,V V Tarakanova,A I Romanenko,O B Sosnina

doi:10.1051/bioconf/20202700008

Abstract

The purpose of studying the thermal effusivity of the grain mass in a metal silo is to obtain a dynamic mathematical model of the processes of layered changes in the temperature of the grain mass under the influence of an external factor. Such an external factor is the supply of cooling air through the air distribution grid of the bottom of the silo with the active ventilation of grain in a metal silo. The created mathematical and parametric models allow simulating the moisture transfer process using active air ventilation systems inside metal silos during storage of wheat grain. There have been developed some ways to improve the conditions for ensuring the quality preservation of grain during its long-term storage in a metal silo. It is necessary to load such a silo with grain completely, preferably up to the top, leaving free supergrannial space as small as possible. Another solution is thermal insulation of the surfaces of the silo. The task of ensuring the safety of wheat food grain can be accomplished not only on the basis of existing regulatory rules, but also by taking into account the results of new research. The main method of storage in metal containers, according to the instructions and safety regulations is the storage of grain in a dry and purified state. It is known that not only humidity and purity, but also the temperature of the grain put into storage affect the storage period.

Highlights

Reduction of the wheat grain losses during its storage period on a national scale potentially gives results similar to an increase in bulk yield
Metal silo of large capacity intended for grain storage are equipped with two installations of influence on the air space inside the silo: active ventilation of the grain mass and ventilation of the space above the grain under the roof of the silo
Some ways have been developed to improve the conditions for ensuring the quality preservation of grain during its long-term storage in a metal silo: 1. It is necessary to load such a silo with grain completely, preferably up to the top, leaving free supergrannial space as small as possible

Summary

Introduction

Reduction of the wheat grain losses during its storage period on a national scale potentially gives results similar to an increase in bulk yield. It is known that humidity and purity, and the temperature of the grain put into storage affect the storage period. Metal silo of large capacity intended for grain storage are equipped with two installations of influence on the air space inside the silo: active ventilation of the grain mass and ventilation of the space above the grain under the roof of the silo. Active ventilation systems affect the grain mass with an upward flow of atmospheric air. This system is used to cool the grain mass in order to increase the shelf life, to prevent or eliminate self-heating in it. The installation for ventilation of the over-grain space is used to remove condensate formed during grain storage and settled on the silo structures

Methods

Results

Conclusion