Combustion Characteristics of Diesel-Hydrogen Dual Fuel Engine  – January 6  2024

Combustion Characteristics of Diesel-Hydrogen Dual Fuel Engine.   Experiments and simulation works were conducted on DI diesel engine with hydrogen in the dual fuel mode. Under constant load and speed engine operation, hydrogen induction into the intake manifold reduces the diesel fuel consumption. Diesel reduction of 50, 90, and 97% was achieved during the
investigation. These relatively high percentages of hydrogen fuel are detrimental to the engine performance in terms of energy consumption and efficiency. An increasing hydrogen flow rate at the low
load operation results in a higher SEC. It means that more fuel is necessary to produce the same power output. At this low load operation, the efficiency decreases with hydrogen enrichment. This condition affects the values of SEC. Measurement of in-cylinder pressure was carried out to investigate the
combustion process inside the combustion chamber. Hydrogen enrichment  educed the peak pressure and retarded the start of combustion. CFD simulation reveals that hydrogen enrichment in such a high percentage resulted in slower reaction progress due to lower combustion rate of reaction. Temperature distributions along the cut plane at the spray axis showed the progress of the combustion processes.

 

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Saturday, January 6, 2024