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Analyzing Factors Affecting Gross Indicated Efficiency When Inlet Temperature Is Changed
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 10, 2018 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Observations from engine experiments indicates that the gross indicated efficiency (GIE) increases when the inlet temperature (Tinlet) is lowered. The change in Tinlet affects several important factors, such as the heat release profile (affecting heat and exhaust losses), working fluid properties, combustion efficiency and heat transfer losses. These factors all individually contributes to the resulting change in GIE. However, due to their strong dependency to temperature it is not possible to quantify the contribution from each of these parameters individually. Therefore, a simulation model in GT-power has been created and calibrated to the performed engine experiments. With simulations the temperature dependency can be separated and it becomes possible to evaluate the contribution to GIE from each factor individually. The simulation results indicate that the specific heats of the working medium are the largest contributor. Heat transfer and combustion efficiency are also important factors but are not as significant as the effect from specific heats.
|Technical Paper||Combustion Model for Rapid Prototyping|
|Technical Paper||Advances Toward the Goal of a Genuinely Conjugate Engine Heat Transfer Analysis|
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CitationLam, N., Tunestal, P., and Andersson, A., "Analyzing Factors Affecting Gross Indicated Efficiency When Inlet Temperature Is Changed," SAE Technical Paper 2018-01-1780, 2018, https://doi.org/10.4271/2018-01-1780.
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- Wang, S., van der Waart, K., Somers, B., and de Goey, P., “Experimental Study on the Potential of Higher Octane Number Fuels for Low Load Partially Premixed Combustion,” SAE Technical Paper 2017-01-0750, 2017, doi:10.4271/2017-01-0750.
- Li, C., Yin, L., Shamun, S., Tuner, M. et al., “Transition from HCCI to PPC: The Sensitivity of Combustion Phasing to the Intake Temperature and the Injection Timing with and without EGR,” SAE Technical Paper 2016-01-0767, 2016, doi:10.4271/2016-01-0767.
- Caton, J.A., “On The Importance of Specific Heats as Regards Efficiency Increases for Highly Dilute IC Engines,” Energy Conversion and Management 79:146-160, 2014, doi:10.1016/j.enconman.2013.12.020.
- Hasegawa, N., Moriyoshi, Y., Kuboyama, T., and Iwasaki, M., “Effect of Coolant Water and Intake Air Temperatures on Thermal Efficiency of Gasoline Engines,” 2017,
- Caton, J.A., “A Comparison of Lean Operation and Exhaust Gas Recirculation: Thermodynamic Reasons for the Increases of Efficiency,” SAE Technical Paper 2013-01-0266, 2013, doi:10.4271/2013-01-0266.
- Lam, N., Tuner, M., Tunestal, P., Andersson, A. et al., “Double Compression Expansion Engine Concepts: A Path to High Efficiency,” SAE Int. J. Engines 8(4):1562-1578, 2015, doi:10.4271/2015-01-1260.
- Lam, N., Andersson, A., and Tunestal, P., “Double Compression Expansion Engine concepts: Efficiency Analysis Over a Load Range,” SAE Technical Paper 2018-01-0886, 2018, doi:10.4271/2018-01-0886.
- Heywood, J.B., Internal Combustion Engine Fundamentals (McGraw-Hill), 510, doi:0-07-100499-8.
- Gamma Technologies, “GT-ISE v.2016.”
- McBride, B.J., Martin, S.G., and Reno, A., “Coefficients for Calculating Thermodynamic and Transport Properties of Individual Species,” NASA Report TM-4513, 1993
- Lemmon, E.W., Huber, M.L., and McLinden, M.O., “NIST Standard ReferenceDatabase 23: Reference Fluid Thermodynamic and Transport Properties - REFPROP. 9.0,” 2010, Gaithersburg.doi.citeulike-article-id:11896451.