РЕЗУЛЬТАТЫ ЭКСПЕРИМЕНТАЛЬНЫХ ИССЛЕДОВАНИЙ ГЕЛИОСУШИЛКИ

Abstract

To study the herbs drying process by solar energy using, a series of experiments on alfalfa in the third year of development were conducted. The site selection’s all requirements for crops’ placement and plots’ division with field experience methodology are consistence. To determine the drying regime’s effect on the alfalfa drying process kinetics, a series of experiments to effect of coolant humidity, its speed and temperature on the drying process studying were conducted. The experimental data analysis showed that the coolant’s temperature has the greatest influence on the herbs drying rate. At heliuoplant’s experimental studies’ course for drying herbs, influence degree of various indicators on the drying regime, alfalfa layer height, its grinding degree and the green mass’s initial moisture content on the drying process duration and alfalfa quality was determined. The drying duration, in depending on one factor at constant remaining of the other parameters was studied. Based on the analyses’ results, graphs of changes in the alfalfa’s carotene content in depending on the drying mode, green mass layer height and its granulometric state were constructed. It can be seen that at the coolant temperature decreasing, alfalfa quality is sharply decreased, that is not observed when the drying mode’s other parameters are changing, i. e. at the coolant change’s humidity and velocity, the carotene content is changed slightly. The best from the high quality feed’s obtaining point of view is drying alfalfa, crushed to a size of 0,03 m at a coolant temperature of 80 ...90°C. As a result of experimental data’s mathematical processing, a formula of the herbs drying coefficient’s dependence on the process’s main parameters was obtained. A comparison of the experimental data and the data calculated using the formula showed that the discrepancy does not exceed 17%. A comparison of the theoretical calculations and experimental studies’ results using possibility at theoretical developments in the new drying plants design has shown.