engleski

Comparison of hydrogen internal combustion engines performance with gasoline and its optimization for the lowest consumption and emissions

Greenhouse gas concentrations have increased very rapidly over the last 100 years, resulting in climate change, affecting human, animal and plant health. Several other factors tell us to consider which fuels we will use, such as rising gasoline prices, declining oil inventories etc. All this has led to an increase in demand for new engine fuels such as hydrogen. Hydrogen internal combustion engine development has been receiving more interest recently, particularly for heavy duty commercial vehicles. Part of the motivation for this is as a bridging technology to meet future climate CO2 emission goals, and as technology more compatible with existing automotive knowledge and manufacturing. MATLAB code was developed and the results of the thermodynamic analyses and optimisation of the four-stroke Otto automotive engine, using gasoline vs. hydrogen, are shown in this work. The operating parameters (i.e. air-fuel equivalence ratio, compression ratio, cylinder diameter and charging pressure) of the gasoline and hydrogen engines have been optimised for maximal performance and the results are compared. The simulation results study included the effective power, thermal efficiency, fuel consumption, as well as emissions. Several results were compared to the gasoline baseline model. The results of the simulations indicate that the hydrogen engine can be adjusted to have 5% higher effective power than the gasoline engine, up to 57% lower specific fuel consumption, 15% higher thermal efficiency and lower emissions.

Hydrogen Internal Combustion Engine, Modelling, Optimisation

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