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Energy Audit Perspectives on Biodiesel-Fuelled Diesel Engines

  • Nakul Bansod *,   
  • Sanjay Mohite

Received: 26 Nov 2025 | Revised: 01 Feb 2026 | Accepted: 04 Feb 2026 | Published: 18 May 2026

Abstract

Energy auditing provides a systematic framework for quantifying energy flows, identifying losses, and improving system efficiency. In diesel engines that increasingly use biodiesel blends as renewable fuels, energy audits serve as diagnostic tools to determine performance, emission behavior, and sustainability. This review synthesizes recent research about the use of energy audits to diesel engines using diesel with biodiesel. It examines performance metrics such as brake specific fuel consumption (BSFC), brake thermal efficiency (BTE), and brake specific energy consumption (BSEC), as well as emission indices and heat-flow distribution. The analysis shows that biodiesel blends, especially up to B20, maintain comparable performance to diesel while reducing emissions of smoke, carbon monoxide, hydrocarbons, and particulates. Slight increases in NOx are observed, which can be mitigated by timing optimization and exhaust-gas recirculation. The paper proposes a standardized audit methodology that integrates thermodynamic, environmental, and economic indicators. This framework can harmonize biodiesel evaluation procedures, reduce duplication of experiments, and accelerate the adoption of sustainable fuels. 

References 

  • 1.

    Parker, S.A. Ideas that work! the midnight audit. Strateg. Plan. Energy Environ. 2015, 35, 7–9. https://doi.org/10.1080/10485236.2015.11439120.

  • 2.

    Knothe, G. Biodiesel and renewable diesel: A comparison. Prog. Energy Combust. Sci. 2010, 36, 364–373. https://doi.org/10.1016/j.pecs.2009.11.004.

  • 3.

    Mohite, S.; Maji, S. Biofuel Certification Performance: A Review & Analysis. Eur. J. Sustain. Dev. Res. 2020, 4, em0124. https://doi.org/10.29333/ejosdr/7864.

  • 4.

    Mohite, S.; Maji, S. Importance of Energy Audit in Diesel Engine Fuelled with Biodiesel Blends: Review and Analysis. Eur. J. Sustain. Dev. Res. 2020, 4, em0118. https://doi.org/10.29333/ejosdr/7596.

  • 5.

    Braquet, L. Three levels of energy audits (pre-contract considerations). Strateg. Plan. Energy Environ. 1999, 19, 28–36. https://doi.org/10.1080/10485236.1999.10530576.

  • 6.

    Wallace, S.J.; Kremer, G.G. Diesel engine energy balance study operating on diesel and biodiesel fuels. In Proceedings of IMECE 2008: 2008 ASME International Mechanical Engineering Congress and Exposition, Boston, MA, USA, 31 October–6 November 2008.

  • 7.

    Niu, M.; Leicht, R.M. Information exchange requirements for building walk through energy audits. Sci. Technol. Built Environ. 2016, 22, 328–336. https://doi.org/10.1080/23744731.2016.1151713.

  • 8.

    Kong, L.; Price, L.; Hasanbeigi, A.; et al. Potential for reducing paper mill energy use and carbon dioxide emissions through plant–wide energy audits: A case study in China. Appl. Energy 2013, 102, 1334–1342. https://doi.org/10.1016/j.apenergy.2012.07.013.

  • 9.

    Marques, P.C.; Silva, A.; Henriques, E.; et al. A descriptive framework of the design process from a dual cognitive-engineering perspective. Int. J. Des. Creat. Innov. 2014, 2, 142–164.

  • 10.

    Bazari, Z. Ship energy performance benchmarking/ rating; methodology and application. J. Mar. Eng. Technol. 2007, 6, 11–18. https://doi.org/10.1080/20464177.2007.11020197.

  • 11.

    Thomas, G.; O’Doherty, D.; Sterling, D.; et al. Energy audit of fishing vessels. Proc. Inst. Mech. Eng. Part M J. Eng. Marit. Environ. 2010, 224, 87–101. https://doi.org/10.1243/14750902JEME186.

  • 12.

    Capehart, B.L.; Turner, W.C.; Kennedy, W.J. Guide to Energy Management, 9th ed.; CRC Press: Boca Raton, FL, USA, 2020.

  • 13.

    Abedin, M.J.; Masjuki, H.H.; Kalam, M.A.; et al. Thermal balancing of a multi-cylinder diesel engine operating on diesel, B5 and palm biodiesel blends. J. Clean Energy Technol. 2015, 3, 115–118. https://doi.org/10.7763/JOCET.2015.V3.178.

  • 14.

    Haas, M.; McAloon, A.; Yee, W.; et al. A process model to estimate biodiesel production costs. Bioresour. Technol. 2006, 97, 671–678. https://doi.org/10.1016/j.biortech.2005.03.039.

  • 15.

    Canakci, M.; Hosoz, M. Energy and Exergy analyses of a diesel engine fuelled with various biodiesels. Energy Sources Part B Econ. Plan. Policy 2006, 1, 379–394. https://doi.org/10.1080/15567240500400796.

  • 16.

    Atabani, A.E.; Silitonga, A.S.; Badruddin, I.A.; et al. A comprehensive review on biodiesel as an alternative energy resource and its characteristics. Renew. Sustain. Energy Rev. 2012, 16, 2070–2093. https://doi.org/10.1016/j.rser.2012.01.003.

  • 17.

    Hayes, D.; Babcock, B.; Fabiosa, J.; et al. Biofuels: Potential Production Capacity, Effects on Grain and Livestock Sectors, and Implications for Food Prices and Consumers. J. Agric. Appl. Econ. 2009, 41, 465–491. https://doi.org/10.1017/S1074070800002935.

  • 18.

    Chen, J.; Li, J.; Dong, W.; et al. The potential of microalgae in biodiesel production. Renew. Sustain. Energy Rev. 2018, 90, 336–346. https://doi.org/10.1016/j.rser.2018.03.073.

  • 19.

    Valero, A.L.; Valero, A.; Martínez, A. Inventory of the exergy resources on Earth including its mineral capital. Energy 2010, 35, 989–995. https://doi.org/10.1016/j.energy.2009.06.036.

  • 20.

    Kazmi, A.; Sultana, T.; Ali, A.; et al. Innovations in bioethanol production: A comprehensive review of feedstock generations and technology advances. Energy Strategy Rev. 2025, 57, 101634. https://doi.org/10.1016/j.esr.2024.101634.

  • 21.

    Mohanty, S.; Nayak, S.K.; Kumar, S.; et al. Toughening of petroleum-based (DGEBA) epoxy resins with various renewable resources-based flexible chains for high-performance applications: A review. Ind. Eng. Chem. Res. 2018, 57, 2711–2726. https://doi.org/10.1021/acs.iecr.7b04495.

  • 22.

    Mohite, S.; Kumar, S.; Maji, S. Performance Characteristics of mix oil biodiesel blends with smoke emissions. Int. J. Renew. Energy Dev. 2016, 5, 163–170. https://doi.org/10.14710/ijred.5.2.163-170.

  • 23.

    Sahoo, P.K.; Das, L.M.; Babu, M.K.G.; et al. Comparative evaluation of performance & emission characteristics of jatropha, karanja & polanga based biodiesel as fuel in a tractor engine. Fuel 2009, 88, 1698–1707. https://doi.org/10.1016/j.fuel.2009.02.015.

  • 24.

    Aydin, H.; Bayindir, H. Performance and emission analysis of cottonseed oil methyl ester in a diesel engine. Renew. Energy 2010, 35, 588–592. https://doi.org/10.1016/j.renene.2009.08.009.

  • 25.

    Sivaramakrishnan, K.; Ravikumar, P. Optimization of operational parameters on performance and emissions of a diesel engine using biodiesel. Int. J. Environ. Sci. Technol. 2014, 11, 949–958. https://doi.org/10.1007/s13762-013-0273-5.

  • 26.

    EL-Kasaby, M.; Nemit-allah, M.A. Experimental investigations of ignition delay period and performance of a diesel engine operated with Jatropha oil biodiesel. Alex. Eng. J. 2013, 52, 141–149. https://doi.org/10.1016/j.aej.2012.12.006.

  • 27.

    Mohite, S. Importance of Performance and Emission Characteristics in Biodiesel. In Recent Advances in Mechanical Engineering; Lecture Notes in Mechanical Engineering; Shukla, A.K., Sharma, B.P., Arabkoohsar, A.; et al., Eds.; Springer: Singapore, 2023; pp. 173–187.

  • 28.

    Canakci, M. Combustion characteristics of a turbocharged DI compression ignition engine fueled with petroleum diesel fuels and biodiesel. Bioresour. Technol. 2007, 98, 1167–1175. https://doi.org/10.1016/j.biortech.2006.05.024.

  • 29.

    Um, S.; Park, S.W. Modeling effect of the biodiesel mixing ratio on combustion and emission characteristics using a reduced mechanism of methyl butanoate. Fuel 2010, 89, 1415–1421. https://doi.org/10.1016/j.fuel.2009.10.026.

  • 30.

    Shahabuddin, M.; Liaquat, A.M.; Masjuki, H.H.; et al. Ignition delay, combustion and emission characteristics of diesel engine fueled with biodiesel. Renew. Sustain. Energy Rev. 2013, 21, 623–632. https://doi.org/10.1016/j.rser.2013.01.019.

  • 31.

    Fattah, I.M.R.; Masjuki, H.H.; Kalam, M.A.; et al. Effect of antioxidant on the performance and emission characteristics of a diesel engine fueled with palm biodiesel blends. Energy Convers. Manag. 2014, 79, 265–272. https://doi.org/10.1016/j.enconman.2013.12.024.

  • 32.

    Imtenan, S.; Masjuki, H.H.; Varman, M.; et al. Effect of n-butanol and diethyl ether as oxygenated additives on combustion emission performance characteristics of a multiple cylinder diesel engine fuelled with diesel—Jatropha biodiesel blend. Energy Convers. Manag. 2015, 94, 84–94. https://doi.org/10.1016/j.enconman.2015.01.047.

  • 33.

    Paul, A.; Panua, R.; Debroy, D. An experimental study of combustion, performance, exergy and emission characteristics of a CI engine fueled by diesel-ethanol-biodiesel blends. Energy 2017, 141, 839–852. https://doi.org/10.1016/j.energy.2017.09.137.

  • 34.

    Senhur, S.; Asokan, M.A.; Rahul, R.; et al. Performance, emission and combustion characteristics of diesel engine fuelled with waste cooking oil biodiesel/ diesel blends with additives. Energy 2017, 122, 638–648. https://doi.org/10.1016/j.energy.2017.01.119.

  • 35.

    Babu, D.; Anand, R. Effect of biodiesel-diesel-n-pentanol and biodiesel-diesel-n-hexanol blends on diesel engine emission and combustion characteristics. Energy 2017, 133, 761–776. https://doi.org/10.1016/j.energy.2017.05.103.

  • 36.

    Raheman, H.; Ghadge, S.V. Performance of diesel engine with biodiesel at varying compression ratio and ignition timing. Fuel 2008, 87, 2659–2666. https://doi.org/10.1016/j.fuel.2008.03.006.

  • 37.

    Jacobs, T.J. Waste heat recovery potential of advanced internal combustion engine technologies. J. Energy Resour. Technol. 2015, 137, 042004. https://doi.org/10.1115/1.4030108.

  • 38.

    Demirbas, A. Biodiesel from vegetable oils via transesterification in supercritical methanol. Energy Convers. Manag. 2002, 43, 2349–2356.

  • 39.

    Giakoumis, E.G.; Rakopoulos, C.D.; Dimaratos, A.M.; et al. Exhaust emissions with ethanol or n-butanol diesel fuel blends during transient operation: A review. Renew. Sustain. Energy Rev. 2013, 17, 170–190. https://doi.org/10.1016/j.rser.2012.09.017.

  • 40.

    Lapuerta, M.; Armas, O.; Rodríguez-Fernández, J. Effect of biodiesel fuels on diesel engine emissions. Prog. Energy Combust. Sci. 2008, 34, 198–223.

  • 41.

    Pulkrabek, W.W. Engineering Fundamentals of the Internal Combustion Engine, 2nd ed.; Prentice Hall: Upper Saddle River, NJ, USA, 2003.

  • 42.

    Hosseini, S.H.; Taghizadeh-Alisaraei, A.; Ghobadian, B.; et al. Performance and emission characteristics of a CI engine fuelled with carbon nanotubes and diesel-biodiesel blends. Renew. Energy 2017, 111, 201–213. https://doi.org/10.1016/j.renene.2017.04.013.

  • 43.

    Ramalingam, S.; Rajendran, S.; Ganesan, P. Performance improvement and exhaust emission reduction in biodiesel operated diesel engine through the use of operating parameters and catalytic converter: A review. Renew. Sustain. Energy Rev. 2018, 81, 3215–3222. https://doi.org/10.1016/j.rser.2017.08.069.

  • 44.

    Rajaraman, S.; Yashwanth, G.K.; Rajan, T.; et al. Experimental investigation of performance and emission characteristics of Moringa oil methyl ester and its diesel blends in a single cylinder direct injection diesel engine. In Proceedings of the ASME 2009 International Mechanical Engineering Congress and Exposition (IMECE 2009), Lake Buena Vista, FL, USA, 13–19 November 2009.

  • 45.

    Mohite, S.; Patil, C.K. Linseed Biodiesel—A Review. In Advances in Fluid and Thermal Engineering; Lecture Notes in Mechanical Engineering; Sikarwar, B.S., Sharma, S.K., Jain, A.; et al., Eds.; Springer: Singapore, 2023; pp. 123–131.

  • 46.

    Benajes, J.; García Martínez, A.; Monsalve-Serrano, J.; et al. Achieving clean and efficient engine operation up to full load by combining optimized RCCI and dual-fuel diesel-gasoline combustion strategies. Energy Convers. Manag. 2017, 136, 142–151. https://doi.org/10.1016/j.enconman.2017.01.010.

  • 47.

    Ozsezen, A.N.; Canakci, M. The emission analysis of an IDI diesel engine fuelled with methyl ester of waste frying palm oil and its blends. Biomass Bioenergy 2010, 34, 1870–1878. https://doi.org/10.1016/j.biombioe.2010.07.024.

  • 48.

    Heywood, J.B. Internal Combustion Engine Fundamentals; Tata McGraw Hill: New Delhi, India, 2012.

  • 49.

    Mohite, S.; Maji, S.; Pal, A. Performance Characteristics of Karanja Biodiesel Blends Using Energy Audit Technique. In Recent Advances in Mechanical Engineering; Lecture Notes in Mechanical Engineering; Kumar, A., Pal, A., Kachhwaha, S.S.; et al., Eds.; Springer: Singapore, 2021; pp. 173–182.

  • 50.

    Hasan, M.M.; Rahman, M.M. Performance and emission characteristics of biodiesel –diesel blend and environmental and economic impacts of biodiesel production: A review. Renew. Sustain. Energy Rev. 2017, 74, 938–948. https://doi.org/10.1016/j.rser.2017.03.045.

  • 51.

    Xue, J.; Grift, T.E.; Hansen, A.C. Effect of biodiesel on engine performance and emission. Renew. Sustain. Energy Rev. 2011, 15, 1098–1116. https://doi.org/10.1016/j.rser.2010.11.016.

  • 52.

    Morais, M.G.; Costa, J.A.V. Biofixation of carbon dioxide by Spirulina sp. and Scenedesmus obliquus cultivated in a three-stage serial tubular photobioreactor. J. Biotechnol. 2010, 129, 439–445. https://doi.org/10.1016/j.jbiotec.2007.01.009.

  • 53.

    Ha, G.-S.; El-Dalatony, M.M.; Kim, D.-H.; et al. Biocomponent-based microalgal transformations into biofuels during the pretreatment and fermentation process. Bioresour. Technol. 2020, 302, 122809. https://doi.org/10.1016/j.biortech.2020.122809.

  • 54.

    Dhar, A.; Agarwal, A.K. Performance, emissions and combustion characteristics of Karanja biodiesel in a transportation engine. Fuel 2014, 119, 70–80. https://doi.org/10.1016/j.fuel.2013.11.002.

  • 55.

    Fazal, M.A.; Haseeb, A.S.M.A.; Masjuki, H.H. A critical review on the tribological compatibility of automotive materials in Palm biodiesel. Energy Convers. Manag. 2014, 79, 180–186. https://doi.org/10.1016/j.enconman.2013.12.002.

  • 56.

    Kalam, M.A.; Masjuki, H.H. Biodiesel from palm oil—An analysis of its properties and potential. Biomass Bioenergy 2002, 23, 471–479. https://doi.org/10.1016/S0961-9534(02)00085-5.

  • 57.

    Dall, G.; Speccher, A.; Bruni, E. The green energy audit, a new procedure for the sustainable auditing of existing buildings integrated with the LEED Protocols. Sustain. Cities Soc. 2012, 3, 54–65. https://doi.org/10.1016/j.scs.2012.02.001.

  • 58.

    Mohite, S.; Rohtagi, P.K. Biodiesel in India—A Review. In Advances in Fluid and Thermal Engineering; Lecture Notes in Mechanical Engineering; Sikarwar, B.S., Sundén, B., Wang, Q.; et al., Eds.; Springer: Singapore, 2021; pp. 807–815.

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DOI
10.53941/tsa.2026.100011
Issue
Volume 1, Issue 2
How to Cite
Bansod, N.; Mohite, S. Energy Audit Perspectives on Biodiesel-Fuelled Diesel Engines. Thermal Science and Applications 2026, 1 (2), 163–175. https://doi.org/10.53941/tsa.2026.100011.
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