The Design And Characteristics Research Of Hydrogen Adsorption Storage Applied To Hydrogen Vehicle

As the pollution on the environment and resources are limited, Fossil energy is facing the challenge of renewable clean energy which could be efficient used. Hydrogen, as a storage material of rich and wide variety of sources, is getting the people's attention.Three issues need to be paid attention on the use of hydrogen, which are hydrogen energy extraction, storage and transportation and application. In which the hydrogen storage and transportation is a key point and has been paid more attention international. At present there are many kinds of technologies in hydrogen storage which includes high-pressure gaseous hydrogen storage technology, low temperature liquid hydrogen storage, metal hydride adsorption of hydrogen storage, carbon nanotube adsorption of hydrogen storage, organic liquid hydride hydrogen storage, etc. In which the metal hydride adsorption of hydrogen storage technology has the advantages of a high volume storage density, safer because of the atomic states of hydrogen, as well as needn't strict insulation relative to the liquid hydrogen storage. At the same time, there are disadvantages of metal adsorption of hydrogen storage technology. The weight hydrogen storage density is pretty low and the thermodynamics have a poor performance, while its powder process also leads to the performance instability.In order to solve the problems for mental adsorption of hydrogen storage technology; this thesis designed a new composite solidification adsorbent system, and developed kinds of adsorbent in different content ratio and solidification method. Hotdisk Thermal Analyzers was also used to determine the heat transfer performance of different hybrid adsorbent. Specific Surface Area Porosity and Chemical Adsorption Analyzer was used to the hybrid adsorbent mass transfer performance tests. At last, a new type of composite solidification adsorbent system was designed. A test bench was designed for testing the adsorption rate and heat transfer of the new system. This thesis also includes a CFD simulation to observe the performance of the new hydrogen storage system.By the test of thermal properties of the composite solidification adsorbents, this thesis find that the axial thermal conductivity of newly developed hybrid adsorbent is 61 times to the normal curing LaNi5, while the radial thermal conductivity promotes 16 times. The mass transfer test shows that the composite solidification adsorbents improve the physical adsorption properties. The CFD heat transfer and adsorption characteristics simulation shows that the newly developed adsorbent has a better thermodynamic performance. At same time in the adsorption process, the difference of temperature in the newly developed adsorbent is about 2℃which is 8℃lower than the normal adsorbent in the same 30℃cooling conditions. The maximum hydrogen absorption rate can increase 24% because of the better performance of heat transfer, the time to reach equilibrium relatively increase 41%.