Comparing the influence of different hydrogen flow rates by induction and injection techniques in emission and combustion outcomes of a CRDI diesel engine operated in dual fuel mode.
2022-01-0565
03/29/2022
- Event
- Content
- The objective of the study is to compare the performance, emission, and combustion characteristics of a CRDI engine for various flow rates of hydrogen used by induction and injection methods. The investigation was conducted at constant speed on the water-cooled CRDI diesel engine having 5.2 kW power. During the suction stroke, hydrogen gas is passed as the secondary fuel along with the intake of fresh air at 3 different proportions (3, 9 and 15 liters per min) by both induction and injection methods. The primary diesel fuel is injected at a crank angle of 23⁰ bTDC, and this acts as an ignition source for the premixed mixture of hydrogen and air. The results showed a negative effect with 15 LPM (litres per minute) of hydrogen induction. However, for the injection method, all the flow rates showed positive results and the improvement was observed until the maximum flow rate. Among these proportions, 15 LPM of hydrogen injection showed the highest performance values by improving brake thermal efficiency by 28.96 %, and the reduction in emission levels of CO, CO2, UHC and smoke were noticed to be 22.3 %, 14%, 32.74% and 43.86 %, respectively, compared to diesel fuel at full load. The level of nitrogen oxides, on the other hand, increased by 7.3% compared to diesel fuel at its maximum power output setting. Overall, it was found that injection was superior to the induction technique, and the induction technique is not suitable for higher flow rates of hydrogen usage. Moreover, with the usage of hydrogen, performance improvement and emission reduction were also noticed.
- Citation
- V T, V., Panithasan, M., and Venkadesan, G., "Comparing the influence of different hydrogen flow rates by induction and injection techniques in emission and combustion outcomes of a CRDI diesel engine operated in dual fuel mode.," SAE Technical Paper 2022-01-0565, 2022, .