EFFECTS OF COMPRESSION RATIO
ON COMBUSTION OF BIOGAS ENGINES
Abstract:
The structure of conventional engines is maintained while they are converted to biogas- powered engines so that they can reuse petroleum as fuel when needed as before conversion. In this case the detonation problem should be treated. This paper simulates the effects of compression ratio on the combustion in the engines fueled with biogas containing different CO2 concentrations.
The results show that the compression ratio strongly influences the pressures at the end of combustion processes, but it presents some effect on the final combustion temperatures and on heat release curves. With a given compression ratio of 12, the temperatures and pressures at the end of combustion in engines decrease by 473K and 2 Mpa respectively; while, the molar concentration of CO2 in the fuel increases from 20% to 40%.
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