The Performance Research And Improvement Of Hydrogen Vehicle’s Power System

In human society, coal, oil, natural gas and fossil fuels are the mainchoices in the current energy structure, but these fossil fuel storage arenot unlimited, with the growing demand for energy and reducingtraditional energy sources, as well as social development for higherquality of living environment, so that in the coming years,"green energy"will be more and more used by us in order to reduce dependence on fossilfuels and to prevent the deterioration of the environment, which willimprove the quality of people’s lives. This is especially true in theautomotive field.This thesis constructs research about hydrogen vehicle，introducesthe design of the self-reforming NaBH4vehicle. Compared to the otherhydrogen-produced way, hydrolysis of NaBH4has advantages like it issafe and environmentally friendly, reaction is under room temperature,easy to store, resource recycling, high conversion efficiency. Based on it, this thesis designs the NaBH4hydrolysis system to safely and accuratelycontrol the hydrogen production rate. It also designs the hydrogen supplysystem and makes designing improvements for hydrogen gas injectionsystems, as well as proposes and designs duel-fuel of hydrogen and otherfuels mixed combustion system structure.This thesis creatively uses multi-disciplinary simulation softwareAMESim to establish a hydrogen internal combustion engine model andconstruct cylinder combustion simulation analysis based on the model,the results show that the hydrogen engine has best performance under theparameters which bore is85mm,compress ratio is13,spark angle is15°.Under this situation, hydrogen engine can provide greater power thangasoline engine; it’s about1.7times that of gasoline engine.This thesis also uses the AMESim-provided platform to design andbuild a model of automobile, the design model refects the vehicle welland passes through software compile. Compared the results of gasolinevehicle and hydrogen vehicle, we find that although hydrogen vehicletakes more fuel than gasoline vehicle and its exhaust fluid is a littlestronger than gasoline vehicle,hydrogen vehicle gives more in BMEPand engine speed.This thesis demonstrates the advantage of hydrolysis of NaBH4vehicle, designs NaBH4hydrolysis system and hydrogen supply system;analysis the different between hydrogen vehicle and gasoline vehicle in dynamic performance. The thesis helps to design and develop hydrogenvehicle structure, provides a good support for future hydrogen-poweredautomobile performance analysis which can reduce the consumption ofhuman、material and financial resources.