Features of Temperature Changes in The Wall Layers of Wheat Grain During Storage in Silos of Elevators
The dynamics of changes in internal temperatures in reinforced concrete silos is insufficiently covered in domestic and foreign studies. The purpose of this article is to study the dynamics of grain temperature change in the center of the silo in the traditional way using thermal hangers, as well as along horizontal layers, to determine the thickness of the near-wall grain layer subject to the greatest heating / cooling, as well as to highlight the critical layer in it. An analysis of the results of monitoring the temperature regime of wheat storage using a measuring system of thermohygrometers (loggers) of the DS1923-F5 type is presented. The study was carried out during the annual cycle in the outer silos of an elevator located in the temperate climate of the West Siberian climatic region. The distribution of temperatures along the vertical of silos at three levels (upper, middle and lower), the distribution of temperatures along the horizontal of silos (at different distances from the wall of the silo from 5 to 75 cm) was studied. A comparative analysis of the data on the temperature regime in silos located on the southern and northern sides of the elevator was made. New original data from thermohygrometers were obtained, which were statistically processed. The thickness of the near-wall layer of the grain mass, which is most susceptible to undesirable temperature effects for the outer silos of the southern and northern sides of the elevator, has been determined. near-wall layers of grain and spaced from the outer wall up to one meter. It is shown that the most critical with a higher temperature is the upper level, where it is necessary to more carefully control the quality of the grain. The middle and lower levels are in more favorable temperature conditions of preservation. The most critical horizontal layers of grain (i.e. those having a temperature above 15 °C in summer) at the lower level include layers from near-wall to silo separated from the walls by 35 cm, and at the upper level all layers from near-wall to silo separated from walls at 75 cm.