Research On The Design Of On-board Hydrogen Production System And Engine Performance Of Hydrogen-blended Combustion Mode

With the gradual increase of vehicle ownership per capita in China,the unreasonable structure of fossil energy such as oil,coal and natural gas,and the excessive dependence on imports of energy have become increasingly prominent.Therefore,finding new clean energy to replace the traditional fossil energy is the most important problem facing China.Hydrogen energy has been widely concerned and studied by scholars all over the world because of its advantages of clean environmental protection,wide sources and sustainable recycling.At present,electrolyzed water is one of the most promising hydrogen production methods.Electrolysis can be used to decompose water into hydrogen and oxygen.After the hydrogen is burned,it will generate water.This cycle can fundamentally solve the problems of energy and the environment.However,the low efficiency of water electrolysis leads to a high cost of hydrogen production.The use of high-efficiency electrodes can greatly improve the efficiency of hydrogen production,reduce the cost of hydrogen production,and accelerate the development of hydrogen energy vehicles.In addition,hydrogen energy vehicles are also facing the dangers of hydrogen storage and imperfect domestic hydrogenation facilitiesIn view of the above problems,this paper prepared an electrolytic water hydrogen production device,the device and the traditional gasoline engine combined to design a new car hydrogen production system,and put forward a new gasoline engine mixed with hydrogen combustion mode.Then,gt-power simulation software is used to simulate and analyze the working process of the gasoline engine in this mode.The detailed research contents are as follows:1)The integrated phosphide catalytic electrode Fe-Ni₂P/NF with self-supporting nano-array structure was successfully prepared by impregnation and high-temperature phosphating.Then using SEM,EDS and XRD characterization and electrochemical testing methods to analyze their physical properties and electrochemical performance in detail.In addition,two Fe-Ni₂P/NF catalytic electrodes were assembled into an actual electrolysis water hydrogen production device to test its electrolysis water hydrogen production performance.The results show that the catalytic electrode has excellent electrolysis water hydrogen production effect,which only needs 1.65 V can reach the current density of 10 mA cm^-2.2)A new type of on-board electrolysis water hydrogen production system is designed by combining the above electrolysis water hydrogen production device with a traditional engine.Starting from the overall structure of the car body,the complexity of the road conditions and the environment,the structure,materials and sensors of multiple on-board electrolyzed hydrogen production system units such as water storage tanks,electrolytic cells and drying units were comprehensively designed and optimized.Compared with the current on-board hydrogen storage device,this on-board electrolyzed water hydrogen production system effectively solves the core problems faced by hydrogen energy vehicles,such as the difficulty of manufacturing hydrogen storage devices,the danger of a large number of hydrogen storage and the incomplete hydrogenation facilities.3)On the basis of the on-board hydrogen production system,a new gasoline engine hydrogen blending combustion mode is proposed,which provides new ideas and new directions for the current application of hydrogen in traditional automobiles.The GT-Power simulation software was used to simulate and study the working process of the gasoline engine in the hydrogen-combustion mode.The results showed that the fuel economy,power and emission characteristics of the engine were improved in the hydrogen-combustion mode.