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Waste Energy Recovery and Valorization in Internal Combustion Engines for Transportation

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  • Davide Di Battista

    (Department of Industrial and Information Engineering and Economics, University of L’Aquila, 67100 L’Aquila, Italy)

  • Roberto Cipollone

    (Department of Industrial and Information Engineering and Economics, University of L’Aquila, 67100 L’Aquila, Italy)

Abstract

Internal Combustion Engines (ICE) are experiencing a transition era in which research and innovation are mainly pushed by environmental issues: emission reduction and fuel saving are indispensable requirements of the new technologies, otherwise the end of ICE is proposed in Europe. Modifications, in reality, are under discussion by 2026 but the environmental issues are anyway welcomed. In the transportation sector, today dominated by ICEs, it appears that the reduction in the propulsion power, hybridization at various degrees, and exhaust post-treatment improvements will guarantee technological solutions able to support the transition in the next couple of decades toward full electric propulsion. Waste Heat Recovery (WHR) is a very interesting opportunity since almost two-thirds of fuel energy is not converted into mechanically useful energy. Moreover, the integration with other thermal streams on board (cooling and lubricating mediums, EGR cooling) can add further value to the recovery opportunity as well as the concept of managing the engine thermal management which can produce a sensible contribution that is appreciated mainly during urban driving. A huge scientific effort is underway, and a great expectation is perceptible. More generally, the technological options that can achieve a reduction in overall fuel consumption and, thus, the improvement of global engine efficiency, are the most valuable when they can be introduced without massive changes to the engine layout. This happens in all the energy applications in which ICEs are involved since the recovery unit can be introduced in the exhaust line. The mechanical energy recovered can be easily transformed into electrical energy, so represents an interesting integration with the hybrid propulsion powertrains. In this paper, a review of the most important technologies referred to the WHR is presented, outlining advantages and drawbacks, and setting up the presently available technologies referred to the transportation sector.

Suggested Citation

  • Davide Di Battista & Roberto Cipollone, 2023. "Waste Energy Recovery and Valorization in Internal Combustion Engines for Transportation," Energies, MDPI, vol. 16(8), pages 1-28, April.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:8:p:3503-:d:1125966
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    1. Fabio Fatigati & Diego Vittorini & Yaxiong Wang & Jian Song & Christos N. Markides & Roberto Cipollone, 2020. "Design and Operational Control Strategy for Optimum Off-Design Performance of an ORC Plant for Low-Grade Waste Heat Recovery," Energies, MDPI, vol. 13(21), pages 1-23, November.
    2. Shi, Lingfeng & Tian, Hua & Shu, Gequn, 2020. "Multi-mode analysis of a CO2-based combined refrigeration and power cycle for engine waste heat recovery," Applied Energy, Elsevier, vol. 264(C).
    3. Wu, Chuang & Yan, Xiao-jiang & Wang, Shun-sen & Bai, Kun-lun & Di, Juan & Cheng, Shang-fang & Li, Jun, 2016. "System optimisation and performance analysis of CO2 transcritical power cycle for waste heat recovery," Energy, Elsevier, vol. 100(C), pages 391-400.
    4. Zhang, Xinxin & Zhang, Yin & Wang, Jingfu, 2020. "New classification of dry and isentropic working fluids and a method used to determine their optimal or worst condensation temperature used in Organic Rankine Cycle," Energy, Elsevier, vol. 201(C).
    5. Pasini, Gianluca & Lutzemberger, Giovanni & Frigo, Stefano & Marelli, Silvia & Ceraolo, Massimo & Gentili, Roberto & Capobianco, Massimo, 2016. "Evaluation of an electric turbo compound system for SI engines: A numerical approach," Applied Energy, Elsevier, vol. 162(C), pages 527-540.
    6. Thomas Grube & Detlef Stolten, 2018. "The Impact of Drive Cycles and Auxiliary Power on Passenger Car Fuel Economy," Energies, MDPI, vol. 11(4), pages 1-26, April.
    7. Lion, Simone & Michos, Constantine N. & Vlaskos, Ioannis & Rouaud, Cedric & Taccani, Rodolfo, 2017. "A review of waste heat recovery and Organic Rankine Cycles (ORC) in on-off highway vehicle Heavy Duty Diesel Engine applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 79(C), pages 691-708.
    8. Kaneko, Kenichi & Ohtani, Kiyoshi & Tsujikawa, Yoshiharu & Fujii, Shoichi, 2004. "Utilization of the cryogenic exergy of LNG by a mirror gas-turbine," Applied Energy, Elsevier, vol. 79(4), pages 355-369, December.
    9. Peter Durcansky & Radovan Nosek & Jozef Jandacka, 2020. "Use of Stirling Engine for Waste Heat Recovery," Energies, MDPI, vol. 13(16), pages 1-15, August.
    10. Luo, Junwei & Lu, Pei & Chen, Kaihuang & Luo, Xianglong & Chen, Jianyong & Liang, Yingzong & Yang, Zhi & Chen, Ying, 2023. "Experimental and simulation investigation on the heat exchangers in an ORC under various heat source/sink conditions," Energy, Elsevier, vol. 264(C).
    11. Jiang, Juyuan & Hu, Jianli & Cui, Mingxian & Tian, He, 2012. "Integration of hydrogen production and waste heat recovery in electrochemical wastewater treatment," Renewable Energy, Elsevier, vol. 43(C), pages 179-182.
    12. Emiliano Pipitone & Salvatore Caltabellotta, 2021. "Efficiency Advantages of the Separated Electric Compound Propulsion System for CNG Hybrid Vehicles," Energies, MDPI, vol. 14(24), pages 1-31, December.
    13. Pili, Roberto & Bojer Jørgensen, Søren & Haglind, Fredrik, 2022. "Multi-objective optimization of organic Rankine cycle systems considering their dynamic performance," Energy, Elsevier, vol. 246(C).
    14. Wan Rashidi Bin Wan Ramli & Apostolos Pesyridis & Dhrumil Gohil & Fuhaid Alshammari, 2020. "Organic Rankine Cycle Waste Heat Recovery for Passenger Hybrid Electric Vehicles," Energies, MDPI, vol. 13(17), pages 1-27, September.
    15. Crespi, Francesco & Gavagnin, Giacomo & Sánchez, David & Martínez, Gonzalo S., 2017. "Supercritical carbon dioxide cycles for power generation: A review," Applied Energy, Elsevier, vol. 195(C), pages 152-183.
    16. Zhang, Xinxin & Li, Yang, 2023. "An examination of super dry working fluids used in regenerative organic Rankine cycles," Energy, Elsevier, vol. 263(PD).
    17. Maraver, Daniel & Royo, Javier & Lemort, Vincent & Quoilin, Sylvain, 2014. "Systematic optimization of subcritical and transcritical organic Rankine cycles (ORCs) constrained by technical parameters in multiple applications," Applied Energy, Elsevier, vol. 117(C), pages 11-29.
    18. Fabio Fatigati & Marco Di Bartolomeo & Davide Di Battista & Roberto Cipollone, 2020. "Experimental Validation of a New Modeling for the Design Optimization of a Sliding Vane Rotary Expander Operating in an ORC-Based Power Unit," Energies, MDPI, vol. 13(16), pages 1-23, August.
    19. Ibrahim, Amier & Jiang, Fangming, 2021. "The electric vehicle energy management: An overview of the energy system and related modeling and simulation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 144(C).
    20. Abrosimov, Kirill & Baccioli, Andrea & Bischi, Aldo, 2020. "Extensive techno-economic assessment of combined inverted Brayton – Organic Rankine cycle for high-temperature waste heat recovery," Energy, Elsevier, vol. 211(C).
    21. Lecompte, Steven & Huisseune, Henk & van den Broek, Martijn & Vanslambrouck, Bruno & De Paepe, Michel, 2015. "Review of organic Rankine cycle (ORC) architectures for waste heat recovery," Renewable and Sustainable Energy Reviews, Elsevier, vol. 47(C), pages 448-461.
    22. Carmela Perozziello & Lavinia Grosu & Bianca Maria Vaglieco, 2021. "Free-Piston Stirling Engine Technologies and Models: A Review," Energies, MDPI, vol. 14(21), pages 1-22, October.
    23. Simone Lombardi & Manfredi Villani & Daniele Chiappini & Laura Tribioli, 2020. "Cooling System Energy Consumption Reduction through a Novel All-Electric Powertrain Traction Module and Control Optimization," Energies, MDPI, vol. 14(1), pages 1-22, December.
    24. Yun, Eunkoo & Kim, Dokyun & Yoon, Sang Youl & Kim, Kyung Chun, 2015. "Experimental investigation of an organic Rankine cycle with multiple expanders used in parallel," Applied Energy, Elsevier, vol. 145(C), pages 246-254.
    25. Ravi, Rajesh & Pachamuthu, Senthilkumar & Kasinathan, Padmanathan, 2020. "Computational and experimental investigation on effective utilization of waste heat from diesel engine exhaust using a fin protracted heat exchanger," Energy, Elsevier, vol. 200(C).
    26. Marian Von Lukowicz & Elisabeth Abbe & Tino Schmiel & Martin Tajmar, 2016. "Thermoelectric Generators on Satellites—An Approach for Waste Heat Recovery in Space," Energies, MDPI, vol. 9(7), pages 1-14, July.
    27. Catapano, F. & Frazzica, A. & Freni, A. & Manzan, M. & Micheli, D. & Palomba, V. & Sementa, P. & Vaglieco, B.M., 2022. "Development and experimental testing of an integrated prototype based on Stirling, ORC and a latent thermal energy storage system for waste heat recovery in naval application," Applied Energy, Elsevier, vol. 311(C).
    28. Uusitalo, Antti & Turunen-Saaresti, Teemu & Honkatukia, Juha & Dhanasegaran, Radheesh, 2020. "Experimental study of small scale and high expansion ratio ORC for recovering high temperature waste heat," Energy, Elsevier, vol. 208(C).
    29. Di Battista, D. & Fatigati, F. & Carapellucci, R. & Cipollone, R., 2019. "Inverted Brayton Cycle for waste heat recovery in reciprocating internal combustion engines," Applied Energy, Elsevier, vol. 253(C), pages 1-1.
    30. Davide Di Battista & Roberto Cipollone, 2017. "Improving Engine Oil Warm Up through Waste Heat Recovery," Energies, MDPI, vol. 11(1), pages 1-18, December.
    31. Li, Yung-Ming & Hung, Tzu-Chen & Wu, Chia-Jung & Su, Ting-Ying & Xi, Huan & Wang, Chi-Chuan, 2021. "Experimental investigation of 3-kW organic Rankine cycle (ORC) system subject to heat source conditions: A new appraisal for assessment," Energy, Elsevier, vol. 217(C).
    32. Feng, Yong-Qiang & Zhang, Qiang & Xu, Kang-Jing & Wang, Chun-Ming & He, Zhi-Xia & Hung, Tzu-Chen, 2023. "Operation characteristics and performance prediction of a 3 kW organic Rankine cycle (ORC) with automatic control system based on machine learning methodology," Energy, Elsevier, vol. 263(PC).
    33. Yari, M. & Mehr, A.S. & Zare, V. & Mahmoudi, S.M.S. & Rosen, M.A., 2015. "Exergoeconomic comparison of TLC (trilateral Rankine cycle), ORC (organic Rankine cycle) and Kalina cycle using a low grade heat source," Energy, Elsevier, vol. 83(C), pages 712-722.
    34. Jung, Hyung-Chul & Taylor, Leighton & Krumdieck, Susan, 2015. "An experimental and modelling study of a 1 kW organic Rankine cycle unit with mixture working fluid," Energy, Elsevier, vol. 81(C), pages 601-614.
    35. Di Battista, D. & Mauriello, M. & Cipollone, R., 2015. "Waste heat recovery of an ORC-based power unit in a turbocharged diesel engine propelling a light duty vehicle," Applied Energy, Elsevier, vol. 152(C), pages 109-120.
    36. Miguel Castro Oliveira & Muriel Iten & Pedro L. Cruz & Helena Monteiro, 2020. "Review on Energy Efficiency Progresses, Technologies and Strategies in the Ceramic Sector Focusing on Waste Heat Recovery," Energies, MDPI, vol. 13(22), pages 1-24, November.
    37. Xinxin Zhang & Yin Zhang & Zhenlei Li & Jingfu Wang & Yuting Wu & Chongfang Ma, 2020. "Zeotropic Mixture Selection for an Organic Rankine Cycle Using a Single Screw Expander," Energies, MDPI, vol. 13(5), pages 1-20, February.
    38. Andrea Cinocca & Marco Di Bartolomeo & Roberto Cipollone & Roberto Carapellucci, 2020. "A Definitive Model of a Small-Scale Concentrated Solar Power Hybrid Plant Using Air as Heat Transfer Fluid with a Thermal Storage Section and ORC Plants for Energy Recovery," Energies, MDPI, vol. 13(18), pages 1-22, September.
    39. Chuan-Wei Zhang & Ke-Jun Xu & Lin-Yang Li & Man-Zhi Yang & Huai-Bin Gao & Shang-Rui Chen, 2018. "Study on a Battery Thermal Management System Based on a Thermoelectric Effect," Energies, MDPI, vol. 11(2), pages 1-15, January.
    40. Rajesh Ravi & Senthilkumar Pachamuthu, 2018. "Design and Development of Innovative Protracted-Finned Counter Flow Heat Exchanger (PFCHE) for an Engine WHR and Its Impact on Exhaust Emissions," Energies, MDPI, vol. 11(10), pages 1-19, October.
    41. Chung-Won Cho & Ho-Seong Lee & Jong-Phil Won & Moo-Yeon Lee, 2012. "Measurement and Evaluation of Heating Performance of Heat Pump Systems Using Wasted Heat from Electric Devices for an Electric Bus," Energies, MDPI, vol. 5(3), pages 1-12, March.
    42. Akbari, Ata D. & Mahmoudi, Seyed M.S., 2014. "Thermoeconomic analysis & optimization of the combined supercritical CO2 (carbon dioxide) recompression Brayton/organic Rankine cycle," Energy, Elsevier, vol. 78(C), pages 501-512.
    43. Dong, Shengming & Hu, Xiaowei & Huang, Jun Fang & Zhu, Tingting & Zhang, Yufeng & Li, Xiang, 2021. "Investigation on improvement potential of ORC system off-design performance by expander speed regulation based on theoretical and experimental exergy-energy analyses," Energy, Elsevier, vol. 220(C).
    44. Moradi, Ramin & Habib, Emanuele & Bocci, Enrico & Cioccolanti, Luca, 2020. "Investigation on the use of a novel regenerative flow turbine in a micro-scale Organic Rankine Cycle unit," Energy, Elsevier, vol. 210(C).
    45. Tobias Popp & Andreas P. Weiß & Florian Heberle & Julia Winkler & Rüdiger Scharf & Theresa Weith & Dieter Brüggemann, 2021. "Experimental Characterization of an Adaptive Supersonic Micro Turbine for Waste Heat Recovery Applications," Energies, MDPI, vol. 15(1), pages 1-20, December.
    46. Li, Longquan & Liu, Zhiqiang & Deng, Chengwei & Xie, Nan & Ren, Jingzheng & Sun, Yi & Xiao, Zhenyu & Lei, Kun & Yang, Sheng, 2022. "Thermodynamic and exergoeconomic analyses of a vehicular fuel cell power system with waste heat recovery for cabin heating and reactants preheating," Energy, Elsevier, vol. 247(C).
    47. Naseri, Ali & Moradi, Ramin & Norris, Stuart & Subiantoro, Alison, 2022. "Experimental investigation of a revolving vane expander in a micro-scale organic Rankine cycle system for low-grade waste heat recovery," Energy, Elsevier, vol. 253(C).
    48. Xialai Wu & Ning Zhang & Lei Xie & Wenyan Ci & Junghui Chen & Shan Lu, 2022. "Thermoeconomic Optimization Design of the ORC System Installed on a Light-Duty Vehicle for Waste Heat Recovery from Exhaust Heat," Energies, MDPI, vol. 15(12), pages 1-24, June.
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