Study on Performance of Locomotive Diesel Engine Fueled with Biodiesel Using Two Miller Cycle Technologies

Abstract

In this paper, the simulation model was established based on GT-Power software, and a scheme using the Miller cycle based on biodiesel was proposed. Taking diesel engine 16V265H as the research object, the accuracy of the simulation model was verified by experiments. Combined with the comparison of physical and chemical characteristics of biodiesel and the experimental analysis of biodiesel under three different combinations, it was concluded that low ratio biodiesel was the best choice to meet the power, economy, and emission performance of diesel. Through the simulation scheme of the two Miller cycles for pure diesel (B0) and biodiesel (B10) under different load conditions at 1000 rpm, the NOx emission performance of pure diesel in a Miller cycle was significantly improved. On this basis, the comprehensive performance of the two Miller cycles was compared with biodiesel. The results showed that both the Miller cycles could reduce NOx emission. Combined with other key performances of a diesel engine, the best scheme to improve the performance of the diesel engine was to burn B10 biodiesel and overlap angle the Miller cycle of the variable valve at 30 °CA. The scheme has guiding significance for the application of the 16V265H diesel engine.

Roadmap to Offshore Power-Liquid Hydrogen Co-production and Hybrid Delivery System Based on Superconducting Technology

“…The helium in the Brayton refrigeration cycle is also split into two streams. The temperature of a portion of helium (15) drops to −259.1°C after full expansion, while the temperature of another portion of helium (11) drops to −250.3°C after expansion because it retaining a certain amount of pressure. The latter can be used in HX-5 to supplement the cold energy as it can be re-cooled by expansion.…”

“…The energy exchange between the integrated system and the external environment includes the energy output from expanders, and energy input from compressors and centrifugal pumps [15]. Assuming that the former is recovered and powered for hydrogen liquefaction, the net power of the integrated process can be calculated by Eq.…”

“…The exergy efficiency (EXE) and coefficient of performance (COP) are applied to measure the efficiency of exergy gain of hydrogen and heat removal from hydrogen [15], expressed by Eqs. (3) and (4).…”

Performance Comparison and Optimization of 16V265H Diesel Engine Fueled with Biodiesel Based on Miller Cycle

“…However, when diesel engines without any technical adjustment burn biodiesel, there is a certain negative impact on NO X emissions [18]. This is unmatched by traditional petrochemical diesels [19,20] and it is therefore necessary to conduct basic research on the low ratio biodiesel of locomotive diesel engines. A low ratio means that the volume content of biodiesel in the mixed fuel is low.…”

“…Processes 2022, 10, x FOR PEER REVIEW 2 of 26 traditional petrochemical diesels [19,20] and it is therefore necessary to conduct basic research on the low ratio biodiesel of locomotive diesel engines. A low ratio means that the volume content of biodiesel in the mixed fuel is low.…”