Abstract
When conducting experimental studies, it is necessary to carry out a number of experiments sufficient for obtaining an adequate process improvement model. The process of grain heat treatment in a contact type grain dryer is influenced by a large number of different factors. The study of the total influence of a large number of factors, combined in arbitrary correlation, often leads to unclear patterns and erroneous conclusions. In this regard, all factors that influence the process of grain heat treatment in the developed installation were ranked into the main ones, which have the greatest influence on process development, carrying the greatest information, and additional ones, which are of secondary importance. Applying the method of a priori information formalization, as well as taking into account the requirements for factors (controllability, homogeneity and lack of correlation between them), we identified those of them that have the greatest impact on the process of grain heat treatment in the developed installation: the temperature of the heating surface and the rotation frequency of the conveying working body. Based on the study of previously performed studies on grain heat treatment, research experiments, and also, based on the design features of the developed installation, the factor variation ranges were identified. When conducting the main experiment, we chose the total specific energy consumption for evaporation process of 1 kg of moisture from seeds q, kJ / kg as a criterion for improvement. This parametre combined the process energy parametres, as well as heat, mass transfer, as it depends on the amount of energy consumed and moisture removal. Methodologically correct research experiment allowed us to narrow the field of experiments and, with the minimum required number of experiments, to obtain adequate and reliable results of the main experiment. Improvement of the heating surface temperature and CWB rotation frequency during drying of camelina seeds made it possible to provide the total specific energy consumption for moisture evaporation of 4.40 ... 4.55 MJ / kg with a one-time moisture removal of 2.6 ... 3.1 %
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