THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

online first only

Investigation of the Miller cycle on the performance and emission in a natural gas-diesel dual-fuel marine engine by using two zone combustion model

ABSTRACT
Compared to the standard cycle, the Miller cycle decreases the cylinder maximum combustion temperature which can effectively reduce NOX emissions. In this paper, a zero-dimensional two-zone combustion model is used to establish the simulation model of a marine dual-fuel engine, which is calibrated according to the test report under different loads. Due to the high emissions under part load, the Miller cycle (early intake valve closing method) is used for optimization. By analyzing the cylinder pressure, temperature, heat release rate and NOx emissions under different cases, it can be found that the effective working volume and thermal efficiency decrease with the advance of intake valve closing and improve with the increase of the geometric compression ratio. In all optimization cases, the NOX emissions and fuel consumption are reduced by 72% and 0.1%, respectively, by increasing the geometric compression ratio to 14 and the intake valve closing timing to 510 degree of crank angle (The reference top dead center is 360 degree of crank angle). The simulation results show that the early intake valve closing Miller cycle can effectively reduce the NOX emissions and cylinder peak pressure.
KEYWORDS
PAPER SUBMITTED: 2019-05-18
PAPER REVISED: 2019-09-21
PAPER ACCEPTED: 2019-10-23
PUBLISHED ONLINE: 2019-11-17
DOI REFERENCE: https://doi.org/10.2298/TSCI190518420G
REFERENCES
  1. Guan, B., et al., Review of state of the art technologies of selective catalytic reduction of NOx from diesel engine exhaust, Applied Thermal Engineering, 66 (2014), 1, pp. 395-414
  2. Jeong, S.-J., et al., Numerical Study on the Optimum Injection of Urea-Water Solution for SCR DeNOx System of a Heavy-Duty Diesel Engine to Improve DeNOx Performance and Reduce NH3 Slip, Environmental Engineering Science, 25 (2008), 7, pp. 1017-1036
  3. Pueschel, M., et al., Combination of post-injection and cooled EGR at a medium-speed diesel engine to comply with IMO Tier III emission limits, CIMAC, Shanghai, (2013), pp. 76-84
  4. Scappin, F., et al., Validation of a zero-dimensional model for prediction of NOx and engine performance for electronically controlled marine two-stroke diesel engines, Applied Thermal Engineering, 37 (2012), 1, pp. 344-352
  5. Zhou, S., et al., Evaluation of Miller cycle and fuel injection direction strategies for low NOx emission in marine two-stroke engine, International Journal of Hydrogen Energy, 42 (2017), 31, pp. 20351-20360
  6. Hegab, A., et al., Towards keeping diesel fuel supply and demand in balance: Dual-fuelling of diesel engines with natural gas, Renewable and Sustainable Energy Reviews, 70 (2017), 1, pp. 666-697
  7. Carlucci, A. P., et al., Study of combustion development in methane-diesel dual fuel engines, based on the analysis of in-cylinder luminance, SAE 2010 World Congress and Exhibition, Detroit, MI, United States, 2010: SAE International.
  8. Carlucci, A. P., et al., Combustion and emissions control in diesel-methane dual fuel engines: The effects of methane supply method combined with variable in-cylinder charge bulk motion, Energy Conversion and Management, 52 (2011), 8, pp. 3004-3017
  9. Li, W., et al., Experimental and theoretical analysis of the combustion process at low loads of a diesel natural gas dual-fuel engine, Energy, 94 (2016), pp. 728-741
  10. Li, W., et al., Experimental and theoretical analysis of effects of equivalence ratio on mixture properties, combustion, thermal efficiency and exhaust emissions of a pilot-ignited NG engine at low loads, Fuel, 171 (2016), pp. 125-135
  11. Kesgin, U., Efficiency improvement and NOx emission reduction potentials of two-stage turbocharged Miller cycle for stationary natural gas engines, International Journal of Energy Research, 29 (2005), 3, pp. 189-216
  12. Wang, Y., et al., An analytic study of applying Miller cycle to reduce NOx emission from petrol engine, Applied Thermal Engineering, 27 (2007), 11, pp. 1779-1789
  13. Mikalsen, R., et al., A comparison of Miller and Otto cycle natural gas engines for small scale CHP applications, Applied Energy, 86 (2009), 6, pp. 922-927
  14. Gonca, G., Sahin, B., Effect of turbo charging and steam injection methods on the performance of a Miller cycle diesel engine (MCDE), Applied Thermal Engineering, 118 (2017), 1, pp. 138-146
  15. Tavakoli, S., et al., Miller cycle application to improve lean burn gas engine performance, Energy, 109 (2016), pp. 190-200
  16. Yan, B., et al., The effects of LIVC Miller cycle on the combustion characteristics and thermal efficiency in a stoichiometric operation natural gas engine with EGR, Applied Thermal Engineering, 122 (2017), 1, pp. 439-450
  17. Kayadelen, H., et al., Comparison of Diesel Engine and Miller Cycled Diesel Engine by Using Two Zone Combustion Model, 1st International Symposium on Naval Architecture and Maritime, 2011.
  18. Gonca, G., et al., Comparison of steam injected diesel engine and Miller cycled diesel engine by using two zone combustion model, Journal of the Energy Institute, 88 (2015), 1, pp. 43-52
  19. Provataris, S. A., et al., Prediction of NOx emissions for high speed DI Diesel engines using a semi-empirical, two-zone model, Energy Conversion and Management, 153 (2017), pp. 659-670
  20. Clarke, D., Smith, W. J., The Simulation, Implementation and Analysis of the Miller Cycle Using an Inlet Control Rotary Valve, International Congress & Exposition, 1997: SAE International.
  21. Li, T., et al., The Miller cycle effects on improvement of fuel economy in a highly boosted, high compression ratio, direct-injection gasoline engine: EIVC vs. LIVC, Energy Conversion and Management, 79 (2014), pp. 59-65
  22. Pedrozo, V. B., Zhao, H., Improvement in high load ethanol-diesel dual-fuel combustion by Miller cycle and charge air cooling, Applied Energy, 210 (2018), 1, pp. 138-151
  23. Miller, R. H., Supercharging and internal cooling cycle for high output, ASME Transactions, 69 (1947), pp. 453-457
  24. Lounici, M. S., et al., Investigation on heat transfer evaluation for a more efficient two-zone combustion model in the case of natural gas SI engines, Applied Thermal Engineering, 31 (2011), 2, pp. 319-328
  25. Ghojel, J., Review of the development and applications of the Wiebe function: a tribute to the contribution of Ivan Wiebe to engine research, International Journal of Engine Research, 11 (2010), 4, pp. 297-312
  26. Hires, S. D., et al., The Prediction of Ignition Delay and Combustion Intervals for a Homogeneous Charge, Spark Ignition Engine, 1978: SAE International.
  27. Gu, X. J., et al., Laminar burning velocity and Markstein lengths of methane-air mixtures, Combustion and Flame, 121 (2000), 1, pp. 41-58
  28. Merker, G. P., et al., Simulating Combustion: Simulation of combustion and pollutant formation for engine-development. Springer Science & Business Media, 2005.
  29. Moran, M. J., et al., Fundamentals of engineering thermodynamics. John Wiley & Sons, 2010.
  30. Chang, J., et al., New Heat Transfer Correlation for an HCCI Engine Derived from Measurements of Instantaneous Surface Heat Flux, SAE Transactions, 113 (2004), pp. 1576-1593
  31. Woschni, G., A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine, SAE Transactions, 76 (1968), pp. 3065-3083
  32. Gonca, G., et al., Theoretical and experimental investigation of the Miller cycle diesel engine in terms of performance and emission parameters, Applied Energy, 138 (2015), 1, pp. 11-20
  33. Tang, Y., et al., Investigation on the solution of nitric oxide emission model for diesel engine using optimization algorithms, Fuel, 228 (2018), 1, pp. 81-91
  34. Zhang, J., et al., Effects of Early Intake Valve Closing on Characteristics of Cyclic Variations in Diesel Engine, Transactions of Csice, 34 (2016), 5, pp. 401-408
  35. Benajes, J., et al., Potential of Atkinson cycle combined with EGR for pollutant control in a HD diesel engine, Energy Conversion and Management, 50 (2009), 1, pp. 174-183
  36. Zammit, J. P., et al., The effects of early inlet valve closing and cylinder disablement on fuel economy and emissions of a direct injection diesel engine, Energy, 79 (2015), pp. 100-110