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Comparative Assessment of sCO2 Cycles, Optimal ORC, and Thermoelectric Generators for Exhaust Waste Heat Recovery Applications from Heavy-Duty Diesel Engines
- Source :
- Energies; Volume 16; Issue 11; Pages: 4339
- Publication Year :
- 2023
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2023.
-
Abstract
- 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.
- Subjects :
- Control and Optimization
Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Building and Construction
Electrical and Electronic Engineering
Engineering (miscellaneous)
Energy (miscellaneous)
waste heat recovery
WHR
diesel engine
organic Rankine cycle
ORC
supercritical carbon dioxide
sCO2
thermoelectric generator
TEG
fuel economy
fuel efficiency
fuel consumption reduction
Subjects
Details
- Language :
- English
- ISSN :
- 19961073
- Database :
- OpenAIRE
- Journal :
- Energies; Volume 16; Issue 11; Pages: 4339
- Accession number :
- edsair.doi.dedup.....09f4328b640df4f5f5d4cfdd27256c2b
- Full Text :
- https://doi.org/10.3390/en16114339