چكيده به لاتين
Hydrogen has great potential to become the most important alternative fuel in the future due to its high calorific value and environmental friendliness. However, due to its low density, hydrogen storage is challenging. In this research, since the conductive heat transfer coefficient in metal hydride is very low and the release of hydrogen from the metal hydride tank requires heat, heat transfer in metal hydride is investigated and improved. For this purpose, the waste heat of the hydrogen internal combustion engine is used to release hydrogen from the metal hydride tank. Next, with the help of ANSYS and GT Power software and laboratory data from previous research, a 600 cc single-cylinder 4-stroke internal combustion engine and metal hydride tank are simulated, and the engine heat dissipation output is examined along with the fuel consumption rate at different speeds, and then a metal hydride tank is designed, examined, and analyzed in three different dimensions and Temperatures of 25, 40, and 90 degrees Celsius representing ambient, air, and water temperatures with different heat transfer coefficients were used for design, investigation, and analysis. and it was found that the atomic ratio of hydrogen to metal in the metal hydride tank is 0.94, 0.57 and 0.1 respectively, indicating that the metal hydride tank at a temperature of 90 degrees approaches complete tank depletion.. Also, after examining three different designed metal hydride tanks, factors such as the temperature entering the tank, tank dimensions, and thermal fin were studied and it was found that the hydrogen release in the metal hydride tank increases with increasing temperature and also improves by 0.34% with increasing tank dimensions within a certain range and increases by 16% with the addition of a thermal fin. Increasing the thermal contact area by the fin and increasing the tank height helps to improve the hydrogen release rate and improves heat transfer and increases the tank efficiency.
