Numerical Simulation Analysis Of Hrdrogen And Gasoline Dual-fuel Hcci Combustion By Hydrogen From Methanol Reforming

Along with an increase of the automobile Possession quantity,the air Pollution caused by the pollutant of the automobile emissions is serious day by day.The emission control and reduction become the important technology for Guaranteeing the human sustainable development.The effective way of automobile energy saving and decreasing energy is utilizing automobile waste heat .In this paper, we studied the way of methanol steam reforming by utilizing automobile waste heat to fulfill gasoline-hydrogen fuel system ,and numeric simulated the process of methanol steam reforming and gasoline-hydrogen fuel system in this case.we have got the the case's advantages in theory.First, a two-dimensional , laminar , steady-state , mutil-component transport and reaction model was established for hydrogen production by methanol steam reforming.And then numerical simulation was applied to simulate the effects of the reaction conditions on the performance of reactors in the hydrogen production .The results also showed that the steam to methanol ratio had an optimum value.And a good balance should be kept between reaction temperature and inlet velocity to improve the hydrogen gas quantity and reduce the quantity of CO .Secondly, we calculated the working process of in a gasoline engine by using software FLUENT two-dimensional model coupled with detailed chemical kinetic mechanism, and analysed the process of combustion and emissions forming in the gasoline engine and gasoline-hydrogen engine. The results showed the engine model were basically in agreement with the process of combustion, From the results of hydrogen blended gasoline:the highest temperature, the highest temperature and buring rate increase gradually and high-temperature ignition time advance with hydrogen increasing.It is helpful to ingntion and complete burning of fuel .The result of exhaust analysis obtained that CO and HC show downward trend, NOX and CO2 show rising trend ,it is favorable to slove the high carbon-emissions problem of HCCI. The NOX emission increases by severals times,but the result still below the tradition combustion engine .The main cause is that the buring rate, the highest temperature and the highest pressure increase with hydrogen content,and extend the reaction time and provide more active factors to improve oxidation reaction .The increasing amount of hydrogen have an maximum value, it is not bigger is better.