Combustion and exergy investigation of a compression ignition engine fueled with ethanol and methanol blends


1 Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran

2 Engineering Faculty of Khoy, Urmia University, Urmia, Iran


Today, the use of hybrid fuels in internal combustion engines has been considered to decrease the level of environmental pollutants. Among the various additives used to increase the efficiency and decrease pollution of Compression Ignition (CI) engines, alcohols especially methanol and ethanol have a special place. In this work, a one-dimensional, thermodynamic and two-zone model was used to evaluate the performance and emission of a compression ignition engine using ethanol and methanol in two volumes of 5% and 10% with diesel fuel by using engineering software such as GT-Power. Also, an exergy assessment is performed to study the exergy efficiency and exergy destruction of the engine for desired cases. The results show that the use of diesel fuel with alcoholic compounds reduces the heating value of the fuel compared to the D100 as well as the maximum brake torque and power and significantly reduces the engine exhaust emissions. This reduction is at most equal to 15%, which is of particular importance with respect to pollutants such as  and CO. The exergy analysis shows that addition of alcoholic compounds such as ethanol and methanol by 5% and 10% to diesel fuel reduces braking power, it also reduces input exergy, which decreases exergy destruction and decreases the exergy efficiency by a maximum of 1.1%.


[1] Heywood JB. Combustion engine fundamentals. 1ª Edição. Estados Unidos. 1988.
[2] Padala S, Woo C, Kook S, Hawkes ER. Ethanol utilisation in a diesel engine using dual-fuelling technology. Fuel. 2013 Jul 1;109:597-607.
[3] Ciniviz M, Köse H, Canli E, Solmaz O. An experimental investigation on effects of methanol blended diesel fuels to engine performance and emissions of a diesel engine. Scientific Research and Essays. 2011 Aug 11;6(15):3189-99.
[4] Verhelst S, Turner JW, Sileghem L, Vancoillie J. Methanol as a fuel for internal combustion engines. Progress in Energy and Combustion Science. 2019 Jan 1;70:43-88.
[5] Tat ME. Cetane number effect on the energetic and exergetic efficiency of a diesel engine fuelled with biodiesel. Fuel Processing Technology. 2011 Jul 1;92(7):1311-21.
[6] Sayin Kul B, Kahraman A. Energy and exergy analyses of a diesel engine fuelled with biodiesel-diesel blends containing 5% bioethanol. Entropy. 2016 Nov;18(11):387.
[7] Sarjovaara T, Alantie J, Larmi M. Ethanol dual-fuel combustion concept on heavy duty engine. Energy. 2013 Dec 15;63:76-85.
[8] Candan F, Ciniviz M, Ors I. Effect of cetane improver addition into diesel fuel: Methanol mixtures on performance and emissions at different injection pressures. Thermal Science. 2017;21(1 Part B):555-66.
[9] Lee J, Lee S, Lee S. Experimental investigation on the performance and emissions characteristics of ethanol/diesel dual-fuel combustion. Fuel. 2018 May 15;220:72-9.
[10] Sayin C. Engine performance and exhaust gas emissions of methanol and ethanol–diesel blends. Fuel. 2010 Nov 1;89(11):3410-5.
[11] Fayyazbakhsh A, Pirouzfar V. Comprehensive overview on diesel additives to reduce emissions, enhance fuel properties and improve engine performance. Renewable and Sustainable Energy Reviews. 2017 Jul 1;74:891-901.
[12] Venu H, Madhavan V. Influence of diethyl ether (DEE) addition in ethanol-biodiesel-diesel (EBD) and methanol-biodiesel-diesel (MBD) blends in a diesel engine. Fuel. 2017 Feb 1;189:377-90.
[13] Özgür T, Tosun E, Özgür C, Tüccar G, Aydın K. Performance, Emission and Efficiency Analysis of a Diesel Engine Operated with Diesel and Diesel-Ethanol (e20) Blend. MATTER: International Journal of Science and Technology. 2017 Nov 15;3(3).
[14] Jamrozik A. The effect of the alcohol content in the fuel mixture on the performance and emissions of a direct injection diesel engine fueled with diesel-methanol and diesel-ethanol blends. Energy Conversion and Management. 2017 Sep 15;148:461-76.
[15] Taghavifar H, Nemati A, Walther JH. Combustion and exergy analysis of multi-component diesel-DME-methanol blends in HCCI engine. Energy. 2019 Nov 15;187:115951.
[16] Ma B, Yao A, Yao C, Wu T, Wang B, Gao J, Chen C. Exergy loss analysis on diesel methanol dual fuel engine under different operating parameters. Applied Energy. 2020 Mar 1;261:114483.
[17] Rufino CH, de Lima AJ, Mattos AP, Allah FU, Bernal JL, Ferreira JV, Gallo WL. Exergetic analysis of a spark ignition engine fuelled with ethanol. Energy Conversion and Management. 2019 Jul 15;192:20-9
[18] Khoobbakht G, Akram A, Karimi M, Najafi G. Exergy and energy analysis of combustion of blended levels of biodiesel, ethanol and diesel fuel in a DI diesel engine. Applied Thermal Engineering. 2016 Apr 25;99:720-9.
[19] Baodong Ma, Anren Yao, Chunde Yao, Taoyang Wu, Bin Wang, Jian Gao, Chao Chen. Exergy loss analysis on diesel methanol dual fuel engine under different operating parameters. Applied Energy. 2020.
[20] National Center for Biotechnology Information (2020). PubChem Compound Summary for CID 8900, Heptane. Retrieved September 8, 2020, from https://pubchem.ncbi
[21] National Center for Biotechnology Information (2020). PubChem Compound Summary for CID 887, Methanol. Retrieved September 8, 2020, from https://pubchem.ncbi.nlm.nih
[22] National Center for Biotechnology Information (2020). PubChem Compound Summary for CID 702, Ethanol. Retrieved September 8, 2020, from https://pubchem.ncbi.nlm
[23] Moran MJ, Shapiro HN, Boettner DD, Bailey MB. Fundamentals of engineering thermodynamics. John Wiley & Sons; 2010 Dec 7.
[24] Chaudhari SG, Modi MA, Patel TM, Rathod GP. Exergy Analysis of Compression Ignition Engine Using Biodiesel Blend: Effect of Compression Ratio and Injection Pressure. Exergy. 2016 Apr;6(04).
[25] Bridjesh P, Arunkumar G. Energy and exergy analysis of diesel engine by varying compression ratio. Int J Chem Sci. 2015;13(2):997-1013.
[26] Canakci M, Hosoz M. Energy and exergy analyses of a diesel engine fuelled with various biodiesels. Energy Sources, Part B. 2006 Dec 1;1(4):379-94.
[27] Westin F, Ångström HE. Simulation of a turbocharged SI-engine with two software and comparison with measured data. SAE Technical Paper; 2003 Oct 27.
[28] Weichai WP12.336E40 Engine description, Weichai Power Co., Ltd., 2010.
[29] Mishra C, Kumar N, Chauhan BS, Lim HC, Padhy M. Some experimental investigation on use of methanol and diesel blends in a single cylinder diesel engine. Int J Renew Energy Technol Res. 2013;2(1):1-6.