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Optimization of the Engine Intake Air Temperature through the Air Conditioning Unit
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 03, 2018 by SAE International in United States
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In modern turbocharged internal combustion engines the cooling of the air after the compression stage is the standard technique to reduce temperature of the engine intake air aimed at improving cylinder filling (volumetric efficiency) and, therefore, overall global efficiency. At present, standard values for the intake air temperature are in the range 30-70°C, dependently on engine load, external air conditions and vehicle speed and the adoption of a dedicated cooling fluid operating at low temperatures (-10-0°C) is addressed as the most viable option to achieve an effective temperature reduction.
This paper investigates a pilot engine set-up, featuring an evaporator on the intake line of a turbocharged diesel engine, tested on a high speed dynamometer bench: the evaporator was a part of an air refrigeration unit – the same used for cabin cooling - composed also by a compressor, a condenser and a thermostatic expansion valve. The effects of the undercooling of the charge air have been experimentally assessed in terms of fuel consumption and regulated emission reduction, evaluated on the most common engine operating points. Mechanical power needed by the compressor was obviously taken into account in order to assess the overall benefits.
A fuel consumption reduction has been demonstrated in the order of 2.5% when the intake air subcooling is turned on. A benefit on the regulated emissions has been observed (NOx, PM). HC and CO behavior, on the contrary, deserves some more attention and involves engine control parameters (for instance, EGR rate) and combustion performances.
CitationDi Battista, D., Vittorini, D., Di Bartolomeo, M., and Cipollone, R., "Optimization of the Engine Intake Air Temperature through the Air Conditioning Unit," SAE Technical Paper 2018-01-0973, 2018, https://doi.org/10.4271/2018-01-0973.
- Rose, A.T.J.M., Akehurst, S., and Brace, C.J., “Investigation into the trade-off between the part-load fuel efficiency and the transient response for a highly boosted downsized gasoline engine with a supercharger driven through a continuously variable transmission,” Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 227(12):1674-1686, 2013.
- Hu, B., Turner, J.W.G., Akehurst, S., Brace, C., and Copeland, C., “Observations on and potential trends for mechanically supercharging a downsized passenger car engine: a review,” Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 231(4):435-456, 2017.
- Li, T., Wang, B., and Zheng, B., “A comparison between Miller and five-stroke cycles for enabling deeply downsized, highly boosted, spark-ignition engines with ultra expansion,” Energy Conversion and Management 123:140-152, ISSN 0196-8904, 1 September 2016, doi:10.1016/j.enconman.2016.06.038.
- Galloni, E., Fontana, G., and Palmaccio, R., “Effects of exhaust gas recycle in a downsized gasoline engine,” Applied Energy 105:99-107, ISSN 0306-2619, May 2013, doi:10.1016/j.apenergy.2012.12.046.
- Wang, P., Yao, C., Han, G., Wei, H., and Wang, Q., “The impact of intake air temperature on performance and exhaust emissions of a diesel methanol dual fuel engine,” Fuel 162:101-110, ISSN 0016-2361, 15 December 2015, doi:10.1016/j.fuel.2015.08.073.
- Uriondo, Z., Vanesa Durán Grados, C., Clemente, M., Gutiérrez, J.M., and Martín, L., “Effects of charged air temperature and pressure on NOx emissions of marine medium speed engines,” Transportation Research Part D: Transport and Environment 16(4):288-295, ISSN 1361-9209, June 2011, doi:10.1016/j.trd.2011.01.006.
- Berni, F., Breda, S., Lugli, M., and Cantore, G., “A Numerical Investigation on the Potentials of Water Injection to Increase Knock Resistance and Reduce Fuel Consumption in Highly Downsized GDI Engines,” Energy Procedia 81:826-835, ISSN 1876-6102, 2015, doi:10.1016/j.egypro.2015.12.091.
- Mingrui, W., Sa, N.T., Turkson, R.F., Jinping, L., and Guanlun, G., “Water injection for higher engine performance and lower emissions,” Journal of the Energy Institute 90(2):285-299, ISSN 1743-9671, 2017, doi:10.1016/j.joei.2015.12.003.
- Bozza, F., De Bellis, V., and Teodosio, L., “Potentials of cooled EGR and water injection for knock resistance and fuel consumption improvements of gasoline engines,” Applied Energy 169:112-125, ISSN 0306-2619, 2016, doi:10.1016/j.apenergy.2016.01.129.
- Ma, X., Zhang, F., Han, K., Zhu, Z., and Liu, Y., “Effects of Intake Manifold Water Injection on Combustion and Emissions of Diesel Engine,” Energy Procedia 61:777-781, ISSN 1876-6102, 2014, doi:10.1016/j.egypro.2014.11.963.
- Hassan, M.I. and Brimmo, A.T., “Modeling In-Cylinder Water Injection in a 2-Stroke Internal Combustion Engine,” Energy Procedia 75:2331-2336, ISSN 1876-6102, 2015, doi:10.1016/j.egypro.2015.07.435.
- Tauzia, X., Maiboom, A., and Shah, S.R., “Experimental study of inlet manifold water injection on combustion and emissions of an automotive direct injection Diesel engine,” Energy 35(9):3628-3639, ISSN 0360-5442, 2010, doi:10.1016/j.energy.2010.05.007.
- Gowthaman, S. and Sathiyagnanam, A.P., “Effects of charge temperature and fuel injection pressure on HCCI engine,” Alexandria Engineering Journal 55(1):119-125, ISSN 1110-0168, 2016, doi:10.1016/j.aej.2015.12.025.
- Harada, M., Yasuda, T., Terachi, S., Pujols, S. et al., “Water Cooled Charge Air Cooler Development,” SAE Technical Paper2016-01-0651, 2016, doi:10.4271/2016-01-0651.
- Cipollone, R., Di Battista, D., and Gualtieri, A., “A novel engine cooling system with two circuits operating at different temperatures,” Energy Conversion and Management 75:581-592, ISSN 0196-8904, 2013, doi:10.1016/j.enconman.2013.07.010.
- Cipollone, R., Di Battista, D., Gualtieri, A., and Massimi, M., “Development of Thermal Modeling in Support of Engine Cooling Design,” SAE Technical Paper2013-24-0090, 2013, doi:10.4271/2013-24-0090.
- Zegenhagen, M.T. and Ziegler, F., “Feasibility analysis of an exhaust gas waste heat driven jet-ejector cooling system for charge air cooling of turbocharged gasoline engines,” Applied Energy 160(2015):221-230, 2015.
- Zegenhagen, M.T. and Ziegler, F., “Experimental investigation of the characteristics of a jet-ejector and a jet-ejector cooling system operating with R134a as a refrigerant,” Int. J. Refrig. 56(2015):173-185, 2015.
- Di Battista, D., Mauriello, M., and Cipollone, R., “Waste heat recovery of an ORC-based power unit in a turbocharged diesel engine propelling a light duty vehicle,” Applied Energy 152:109-120, ISSN 0306-2619, 15 August 2015, doi:10.1016/j.apenergy.2015.04.088.
- Gentner, H., “Vergleichende Untersuchung von mechanics, elektrisch un thermisch angetriebenen Kälteanlagen für Fahrzeugklimatisierung,” VDI-Forschungsberichte Reihe 19:82, 1995 (1995).
- Guhr, C., “Verbesserung von Effizienz und Dynamk eines hubraumkleinen turboaufgeladenen 3-Zylinder-DI-Ottomotors durch Abgasrückführung und ein neues Ladeluftkühlkonzept,” Ph.D. thesis, TU Dresden, 2011.
- Manzela, A.A., Hanriot, S.M., Gomez, L.C., and Sodre, J.R., “Using engine exhaust gas as energy source for an absorption refrigeration system,” Appl Energy 8(2010):1141-1148, 2010.
- Novella, R., Dolz, V., Martìn, J., and Royo-Pascual, L., “Thermodynamic analysis of an absorption refrigeration system used to cool down the intake air in an internal combustion engine,” Appl. Therm Eng 111(2017):257-270, 2017.
- Liu, J. and Xu, S., “The performance of absorption-compression hybrid refrigeration driven by waste heat and power from coach engine,” Appl. Therm. Eng. 61(2):747-757, 2013.
- Rêgo, A.T., Hanriot, S.M., Oliveira, A.F., Brito, P., and Rêgo, T.F.U., “Automotive exhaust gas flow control for an ammonia-water absorption refrigeration system,” Appl. Therm. Eng. 64(1-2):101-107, 2014.
- Tamainot-Telto, Z., Metcalf, S.J., and Critoph, R.E., “Novel compact sorption generators for car air conditioning,” Int J Refrig 32(2009):236-241, 2009.
- Uusitalo, A., Honkatukia, J., Backman, J., and Nyyssönen, S., “Experimental study on charge air heat utilization of large-scale reciprocating engines by means of Organic Rankine Cycle,” Applied Thermal Engineering, Volume 89:209-219, ISSN 1359-4311, 5 October 2015, doi:10.1016/j.applthermaleng.2015.06.009.
- Di Battista, D., Mauriello, M., and Cipollone, R., “Effects of an ORC Based Heat Recovery System on the Performances of a Diesel Engine,” SAE Technical Paper2015-01-1608, 2015, doi:10.4271/2015-01-1608.
- Di Battista, D. and Cipollone, R., “High efficiency air conditioning model based analysis for the automotive sector,” International Journal of Refrigeration 64:108-122, ISSN 0140-7007, April 2016, doi:10.1016/j.ijrefrig.2015.12.014.
- Lasocki, J., “Engine knock detection and evaluation: a review,” Zeszyty Naukowe Instytutu Pojazdów/Politechnika Warszawska 5/109:41-50, 2016.
- Cipollone, R., Di Battista, D., and Vittorini, D., “Experimental assessment of engine charge air cooling by a refrigeration unit,” Energy Procedia 126:1067-1074, ISSN 1876-6102, 2017, doi:10.1016/j.egypro.2017.08.226.