Comparative Assessment of sCO2 Cycles, Optimal ORC, and Thermoelectric Generators for Exhaust Waste Heat Recovery Applications from Heavy-Duty Diesel Engines
This study aimed to investigate the potential of supercritical carbon dioxide (sCO2), organic Rankine cycle (ORC), and thermoelectric generator (TEG) systems for application in automotive exhaust waste heat recovery (WHR) applications. More specifically, this paper focuses on heavy-duty diesel engin...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/11/4339 |
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| author | Menaz Ahamed Apostolos Pesyridis Jabraeil Ahbabi Saray Amin Mahmoudzadeh Andwari Ayat Gharehghani Srithar Rajoo |
| author_facet | Menaz Ahamed Apostolos Pesyridis Jabraeil Ahbabi Saray Amin Mahmoudzadeh Andwari Ayat Gharehghani Srithar Rajoo |
| author_sort | Menaz Ahamed |
| collection | DOAJ |
| description | This study aimed to investigate the potential of supercritical carbon dioxide (sCO2), organic Rankine cycle (ORC), and thermoelectric generator (TEG) systems for application in automotive exhaust waste heat recovery (WHR) applications. More specifically, this paper focuses on heavy-duty diesel engines applications such as marine, trucks, and locomotives. The results of the simulations show that sCO2 systems are capable of recovering the highest amount of power from exhaust gases, followed by ORC systems. The sCO2 system recovered 19.5 kW at the point of maximum brake power and 10.1 kW at the point of maximum torque. Similarly, the ORC system recovered 14.7 kW at the point of maximum brake power and 7.9 kW at the point of maximum torque. Furthermore, at a point of low power and torque, the sCO2 system recovered 4.2 kW of power and the ORC system recovered 3.3 kW. The TEG system produced significantly less power (533 W at maximum brake power, 126 W at maximum torque, and 7 W at low power and torque) at all three points of interest due to the low system efficiency in comparison to sCO2 and ORC systems. From the results, it can be concluded that sCO2 and ORC systems have the biggest potential impact in exhaust WHR applications provided the availability of heat and that their level of complexity does not become prohibitive. |
| first_indexed | 2024-03-11T03:08:55Z |
| format | Article |
| id | doaj.art-bf8536dc756a4444a90450b93c52a3f2 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T03:08:55Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-bf8536dc756a4444a90450b93c52a3f22023-11-18T07:47:31ZengMDPI AGEnergies1996-10732023-05-011611433910.3390/en16114339Comparative Assessment of sCO2 Cycles, Optimal ORC, and Thermoelectric Generators for Exhaust Waste Heat Recovery Applications from Heavy-Duty Diesel EnginesMenaz Ahamed0Apostolos Pesyridis1Jabraeil Ahbabi Saray2Amin Mahmoudzadeh Andwari3Ayat Gharehghani4Srithar Rajoo5Department of Mechanical and Aerospace Engineering, Brunel University, London UB8 3PH, UKDepartment of Mechanical and Aerospace Engineering, Brunel University, London UB8 3PH, UKSchool of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran 16846, IranDepartment of Mechanical and Aerospace Engineering, Brunel University, London UB8 3PH, UKSchool of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran 16846, IranUTM Centre for Low Carbon Transport (LoCARtic), IVeSE, Universiti Teknologi Malaysia, Skudai 81310, Johor, MalaysiaThis study aimed to investigate the potential of supercritical carbon dioxide (sCO2), organic Rankine cycle (ORC), and thermoelectric generator (TEG) systems for application in automotive exhaust waste heat recovery (WHR) applications. More specifically, this paper focuses on heavy-duty diesel engines applications such as marine, trucks, and locomotives. The results of the simulations show that sCO2 systems are capable of recovering the highest amount of power from exhaust gases, followed by ORC systems. The sCO2 system recovered 19.5 kW at the point of maximum brake power and 10.1 kW at the point of maximum torque. Similarly, the ORC system recovered 14.7 kW at the point of maximum brake power and 7.9 kW at the point of maximum torque. Furthermore, at a point of low power and torque, the sCO2 system recovered 4.2 kW of power and the ORC system recovered 3.3 kW. The TEG system produced significantly less power (533 W at maximum brake power, 126 W at maximum torque, and 7 W at low power and torque) at all three points of interest due to the low system efficiency in comparison to sCO2 and ORC systems. From the results, it can be concluded that sCO2 and ORC systems have the biggest potential impact in exhaust WHR applications provided the availability of heat and that their level of complexity does not become prohibitive.https://www.mdpi.com/1996-1073/16/11/4339waste heat recoveryWHRdiesel engineorganic Rankine cycleORCsupercritical carbon dioxide |
| spellingShingle | Menaz Ahamed Apostolos Pesyridis Jabraeil Ahbabi Saray Amin Mahmoudzadeh Andwari Ayat Gharehghani Srithar Rajoo Comparative Assessment of sCO2 Cycles, Optimal ORC, and Thermoelectric Generators for Exhaust Waste Heat Recovery Applications from Heavy-Duty Diesel Engines Energies waste heat recovery WHR diesel engine organic Rankine cycle ORC supercritical carbon dioxide |
| title | Comparative Assessment of sCO2 Cycles, Optimal ORC, and Thermoelectric Generators for Exhaust Waste Heat Recovery Applications from Heavy-Duty Diesel Engines |
| title_full | Comparative Assessment of sCO2 Cycles, Optimal ORC, and Thermoelectric Generators for Exhaust Waste Heat Recovery Applications from Heavy-Duty Diesel Engines |
| title_fullStr | Comparative Assessment of sCO2 Cycles, Optimal ORC, and Thermoelectric Generators for Exhaust Waste Heat Recovery Applications from Heavy-Duty Diesel Engines |
| title_full_unstemmed | Comparative Assessment of sCO2 Cycles, Optimal ORC, and Thermoelectric Generators for Exhaust Waste Heat Recovery Applications from Heavy-Duty Diesel Engines |
| title_short | Comparative Assessment of sCO2 Cycles, Optimal ORC, and Thermoelectric Generators for Exhaust Waste Heat Recovery Applications from Heavy-Duty Diesel Engines |
| title_sort | comparative assessment of sco2 cycles optimal orc and thermoelectric generators for exhaust waste heat recovery applications from heavy duty diesel engines |
| topic | waste heat recovery WHR diesel engine organic Rankine cycle ORC supercritical carbon dioxide |
| url | https://www.mdpi.com/1996-1073/16/11/4339 |
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