ВІДНОВЛЕННЯ ЕНЕРГОЗБЕРІГАЮЧІХ ПАЛИВНИХ ЕЛЕМЕНТІВ ПІСЛЯ ВИКОРИСТАННЯМ ЇХ В ВОДНЕВОМУ СЕРЕДОВИЩІ

Abstract

Performing research to determine the effect of temperature on fuel cells and changes in the shape of the elements (plates) in contact with hydrogen. It is confirmed that the deformation of the α-PdHn gradient alloy plate develops in two stages. As a result of the research, experimental regularities of hydrogen-induced palladium plate deformation were established, it was determined that when hydrogen saturation in metal a temporary gradient material “metal-hydrogen” is formed and hydrogen concentration stresses always occur. This in turn provides effective planning and determination of the time of penetration of hydrogen into the metal. Helps control shape change and allows you to adjust the modes of operation of the fuel cell. It is determined that the maximum bending of the plate occurs at a constant temperature, and is determined by two fundamental properties of the Pd-H system, namely, the diffusion coefficient and equilibrium solubility of hydrogen in pala-action. However, when the temperature changes, the diffusion coefficient of hydrogen in palladium and the equilibrium concentration of hydrogen in palladium change, which determines the temperature dependence of the final bending (umin) of the plate and its change (both increase and decrease) with unilateral hydrogen saturation. The scientific novelty is the use of the known material palladium, which in contact with hydrogen becomes a temporary gradient alloy with variable physical properties. It is established that the heat exchange in the plate and the energy equilibrium around the plate are based on the velocity on the heat flux that occurs during reactions in the fuel cells and the heat losses that occur in the fuel cell. The practical importance of the work lies in the possibility of using the developed algorithm in practice in the manufacture of specific devices operating on the basis of a fuel cell - hydrogen, with the possibility of modeling this process in MaСad. But improving the working conditions of fuel cells and hydrogen sensors, because at low temperatures there is a relatively small residual bending of the plate, and accordingly the shape of the fuel cell.