Optimization of Combustion and Emission Characteristics of a two-Stroke Marine Diesel Engine Based on Online Ultrasonic and Magnetization of Marine Heavy Fuel Oil

Zeng, Xin; Tan, Qinming; Tan, Zhiwen

doi:10.1080/00102202.2018.1515830

Cited by 1 publication

(2 citation statements)

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“…Byrnes et al [38] extended the data reported by Costa et al [36,37] by using a rotary cup atomizer to generate HFO spray flames and measured the flame temperature along with the gas emissions (O2, CO, CO2, NOx and PM) under a wider range of operating conditions such as swirl numbers, primary air to fuel ratios and atomizer cup speeds. Villasenor et al [39] experimentally measured the effect of perpendicular secondary air jets on HFO flames in a cylindrical 500kW furnace by directing the secondary air jets close to the edge of the initial combustion stage and found 70% reduction in NO and 100% reduction in CO. A recent study by Zeng et al [12] investigated the effects of ultrasonic waves and magnetization on the combustion and emission performance of HFO in a twostroke diesel engine and found that the engine fuel consumption rate decreased by 1.5%. CO2 and CO emissions reduced while NO emissions increased slightly due to the fuel's online exposure to ultrasonic waves and magnetization effects.…”

Section: Accepted Manuscript N O T C O P Y E D I T E Dmentioning

confidence: 99%

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Swirling Flame Combustion of Heavy Fuel Oil: Effect of Fuel Sulfur Content

Pei

Jameel

Chen

et al. 2020

Journal of Energy Resources Technology

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In the present work, an experimental investigation on the effect of sulfur content in heavy fuel oil (HFO) on the gaseous emissions under swirling flame conditions was carried out. The sulfur content in HFO was varied by blending with ultra-low sulfur diesel and four fuel samples containing 3.15, 2.80, 1.97 and 0.52 % sulfur (by mass) were prepared. The fuels were then fired in a high-swirl stabilized, turbulent spray flame. The combustion performance of the fuels was evaluated by measuring flame temperature distribution, gaseous emissions (SOx, NOx, CO, CO2, and flue gas pH) and particulate matter (PM) emissions (morphology, composition, and pH). The results showed a significant reduction in the SO2 emissions and acidity of the flue gas when the sulfur content in the fuel was reduced, as expected. Flue gas SO2 concentration reduced from 620 ppm to 48 ppm when the sulfur content in the fuel was reduced from 3.15 to 0.52 % (by mass). Sulfur balance calculations indicate that nearly 97.5% of the sulfur in the fuel translates into gaseous emissions and the remaining 2.5% appears in PM emissions. Ninety-five percent of gaseous sulfur emissions are SO2, whereas the rest appears as SO3. Varying the sulfur content in the fuel did not have a major impact on the flame temperature distribution or NOx emissions. The morphologies and size distribution of the PM did not change significantly with sulfur content as asphaltenes content of the fuels remained the same.

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Section: Accepted Manuscript N O T C O P Y E D I T E Dmentioning

confidence: 99%

“…Oxygenates like methanol, ethanol, dimethyl ether etc. have been blended with HFO to reduce the PM emissions [12,13]. HFO combustion also results in the inevitable release of other pollutant gases like CO, CO2 and NOx which are characteristic emissions of all fossil fuel combustion.…”

Section: Introductionmentioning

confidence: 99%