engleski

Analysis of two-stroke low speed marine engines operating on alternative fuels

This paper investigates the performance and emissions of two stroke low speed marine diesel engines running on alternative fuels such as LNG, methanol, hydrogen, ammonia, and their combinations. The numerical simulation of two stroke low speed ma rine diesel engine performance is based on AVL Boost multi zone combustion model. Calibration and validation of the engine numerical model was performed according to the test results of the actual engine running on marine diesel oil. Simulations were conducted to determine whether the use of alternative fuels can meet the requirements of IMO Tier III regulations for the NOx concentration in exhaust gases. The obtained results show that the use of certain alternative fuels in the operation of two stroke low speed marine engines can reduce NOx and carbon dioxide emissions. All mentioned alternative fuels were optimized to reach the required 3.4 g/kWh of NOx emissions with some gains in power (Methane +7 kW, hydrogen +5 kW) and some loses in power (Diesel + methanol 15 kW, and ammonia + hydrogen 7 kW)

two stroke low speed marine diesel engine ; alternative fuels ; numerical simulation ; emission s

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