The Experts below are selected from a list of 36 Experts worldwide ranked by ideXlab platform

Shijin Shuai - One of the best experts on this subject based on the ideXlab platform.

  • combustion and emission characteristics of multiple premixed compression ignition mpci mode fuelled with different low octane gasolines
    Applied Energy, 2015
    Co-Authors: Buyu Wang, Zhi Wang, Shijin Shuai
    Abstract:

    This paper studies the combustion and emission characteristics of three low octane fuels: naphtha, the blend of gasoline and diesel (G70D30), and the blend of gasoline and n-heptane (G70H30) in Multiple Premixed Compression Ignition (MPCI) mode. A commercial diesel fuel is also tested in conventional diesel combustion mode and double injection mode as a comparison. The study is carried out in a single cylinder diesel engine with a compression ratio of 16.7. By varying the common rail pressure, the effect of injection pressure on combustion and emissions is investigated. The results illustrate that the combustion delay of the gasoline-type fuels is extended with the increase of injection pressure. The soot emission decreases at high injection pressure with a penalty of higher CO and HC emissions. Increasing the injection pressure also reduces the particle number in accumulation mode, but produces more in nucleation mode. Among the test fuels, naphtha has the lowest NOx emission due to low combustion temperature but the highest CO and HC emissions. There is no significant difference in particle size distribution for the three fuels. The indicated thermal efficiency of gasoline-type fuels increases with the rise of injection pressure and is higher than that of diesel at high injection pressure. Naphtha has the highest efficiency as a result of its low heat transfer and Exhaust Loss. The diesel fuel has lower CO and HC emissions than the gasoline-type fuels do, but much higher pressure rise rate, NOx and soot emissions due to high combustion temperature and poor premixing. Therefore, the low octane gasoline fuels are more suitable than the diesel for compression ignition engines in terms of the emissions.

Brown, Richard J - One of the best experts on this subject based on the ideXlab platform.

  • Exergy analysis of a diesel engine with waste cooking biodiesel and triacetin
    'Elsevier BV', 2019
    Co-Authors: Odibi Chukwuka, Babaie Meisam, Zare Ali, Nabi, Md Nurun, Bodisco, Timothy A, Brown, Richard J
    Abstract:

    Nabi, M ORCiD: 0000-0002-4087-930XThis study uses the first and second laws of thermodynamics to investigate the effect of oxygenated fuels on the quality and quantity of energy in a turbo-charged, common-rail six-cylinder diesel engine. This work was performed using a range of fuel oxygen content based on diesel, waste cooking biodiesel, and a triacetin. The experimental engine performance and emission data was collected at 12 engine operating modes. Energy and exergy parameters were calculated, and results showed that the use of oxygenated fuels can improve the thermal efficiency leading to lower Exhaust energy Loss. Waste cooking biodiesel (B100) exhibited the lowest Exhaust Loss fraction and highest thermal efficiency (up to 6% higher than diesel). Considering the exergy analysis, lower Exhaust temperatures obtained with oxygenated fuels resulted in lower Exhaust exergy Loss (down to 80%) and higher exergetic efficiency (up to 10%). Since the investigated fuels were oxygenated, this study used the oxygen ratio (OR) instead of the equivalence ratio to provide a better understanding of the concept. The OR has increased with decreasing engine load and increasing engine speed. Increasing the OR decreased the fuel exergy, Exhaust exergy and destruction efficiency. With the use of B100, there was a very high exergy destruction (up to 55%), which was seen to decrease with the addition of triacetin (down to 29%). © 2019 Elsevier Lt

Rj Brown - One of the best experts on this subject based on the ideXlab platform.

  • Exergy analysis of a diesel engine with waste cooking biodiesel and triacetin
    'Elsevier BV', 2019
    Co-Authors: Odibi C, Zare Ali, Babaie M, Mn Nabi, Ta Bodisco, Rj Brown
    Abstract:

    This study uses the first and second laws of thermodynamics to investigate the effect of 18 oxygenated fuels on the quality and quantity of energy in a turbo-charged, common-rail six19 cylinder diesel engine. This work was performed using a range of fuel oxygen content based 20 on diesel, waste cooking biodiesel, and a triacetin. The experimental engine performance and 21 emission data was collected at 12 engine operating modes. Energy and exergy parameters were 22 calculated, and results showed that the use of oxygenated fuels can improve the thermal 23 efficiency leading to lower Exhaust energy Loss. Waste cooking biodiesel (B100) exhibited the 24 lowest Exhaust Loss fraction and highest thermal efficiency (up to 6% higher than diesel). 25 Considering the exergy analysis, lower Exhaust temperatures obtained with oxygenated fuels 26 resulted in lower Exhaust exergy Loss (down to 80%) and higher exergetic efficiency (up to 27 10%). Since the investigated fuels were oxygenated, this study used the oxygen ratio (OR) 28 instead of the equivalence ratio to provide a better understanding of the concept. The OR has 29 increased with decreasing engine load and increasing engine speed. Increasing the OR 30 decreased the fuel exergy, Exhaust exergy and destruction efficiency. With the use of B100, 31 there was a very high exergy destruction (up to 55%), which was seen to decrease with the 32 addition of triacetin (down to 29%)

Zare Ali - One of the best experts on this subject based on the ideXlab platform.

  • Exergy analysis of a diesel engine with waste cooking biodiesel and triacetin
    'Elsevier BV', 2019
    Co-Authors: Odibi Chukwuka, Babaie Meisam, Zare Ali, Nabi, Md Nurun, Bodisco, Timothy A, Brown, Richard J
    Abstract:

    Nabi, M ORCiD: 0000-0002-4087-930XThis study uses the first and second laws of thermodynamics to investigate the effect of oxygenated fuels on the quality and quantity of energy in a turbo-charged, common-rail six-cylinder diesel engine. This work was performed using a range of fuel oxygen content based on diesel, waste cooking biodiesel, and a triacetin. The experimental engine performance and emission data was collected at 12 engine operating modes. Energy and exergy parameters were calculated, and results showed that the use of oxygenated fuels can improve the thermal efficiency leading to lower Exhaust energy Loss. Waste cooking biodiesel (B100) exhibited the lowest Exhaust Loss fraction and highest thermal efficiency (up to 6% higher than diesel). Considering the exergy analysis, lower Exhaust temperatures obtained with oxygenated fuels resulted in lower Exhaust exergy Loss (down to 80%) and higher exergetic efficiency (up to 10%). Since the investigated fuels were oxygenated, this study used the oxygen ratio (OR) instead of the equivalence ratio to provide a better understanding of the concept. The OR has increased with decreasing engine load and increasing engine speed. Increasing the OR decreased the fuel exergy, Exhaust exergy and destruction efficiency. With the use of B100, there was a very high exergy destruction (up to 55%), which was seen to decrease with the addition of triacetin (down to 29%). © 2019 Elsevier Lt

  • Exergy analysis of a diesel engine with waste cooking biodiesel and triacetin
    'Elsevier BV', 2019
    Co-Authors: Odibi C, Zare Ali, Babaie M, Mn Nabi, Ta Bodisco, Rj Brown
    Abstract:

    This study uses the first and second laws of thermodynamics to investigate the effect of 18 oxygenated fuels on the quality and quantity of energy in a turbo-charged, common-rail six19 cylinder diesel engine. This work was performed using a range of fuel oxygen content based 20 on diesel, waste cooking biodiesel, and a triacetin. The experimental engine performance and 21 emission data was collected at 12 engine operating modes. Energy and exergy parameters were 22 calculated, and results showed that the use of oxygenated fuels can improve the thermal 23 efficiency leading to lower Exhaust energy Loss. Waste cooking biodiesel (B100) exhibited the 24 lowest Exhaust Loss fraction and highest thermal efficiency (up to 6% higher than diesel). 25 Considering the exergy analysis, lower Exhaust temperatures obtained with oxygenated fuels 26 resulted in lower Exhaust exergy Loss (down to 80%) and higher exergetic efficiency (up to 27 10%). Since the investigated fuels were oxygenated, this study used the oxygen ratio (OR) 28 instead of the equivalence ratio to provide a better understanding of the concept. The OR has 29 increased with decreasing engine load and increasing engine speed. Increasing the OR 30 decreased the fuel exergy, Exhaust exergy and destruction efficiency. With the use of B100, 31 there was a very high exergy destruction (up to 55%), which was seen to decrease with the 32 addition of triacetin (down to 29%)

Binbin Gao - One of the best experts on this subject based on the ideXlab platform.

  • a quasi dimensional model for combustion performance prediction of an si hydrogen enriched methanol engine
    International Journal of Hydrogen Energy, 2016
    Co-Authors: Jinxin Yang, Xiaolong Liu, Bo Zhang, Shuofeng Wang, Binbin Gao
    Abstract:

    Abstract A two-zone quasi-dimensional model is developed and validated for predicting the performance of a hydrogen-enriched methanol engine. The fractal-based turbulent entrainment model was applied to hydrogen-enriched methanol combustion simulations with a laminar flame speed correlation of hydrogen-methanol-air mixtures. The model accuracy was evaluated under different hydrogen volume fractions, equivalence ratios, loads and speeds. Satisfying agreement between numerical and experimental results was achieved. The validated model was applied to investigate the flame propagation speed, Exhaust Loss and brake thermal efficiency of hydrogen-enriched methanol engines. The results showed that the hydrogen enrichment could improve the flame propagation speed, reduce the Exhaust Loss and enhance brake thermal efficiency. Moreover, the results suggested that, for the actual vehicular engine operation, the hydrogen addition should be coupled with the lean burn strategy under low speed and part load conditions.