Investigation of waste heat recovery system at supercritical conditions with vehicle drive cycles.pdf (1.19 MB)
Investigation of waste heat recovery system at supercritical conditions with vehicle drive cycles
journal contribution
posted on 2023-06-09, 07:12 authored by Jahedul Islam Chowdhury, Bao Kha NguyenBao Kha Nguyen, David ThornhillWaste heat recovery (WHR) for internal combustion engines in vehicles using Organic Rankine cycle (ORC) has been a promising technology. The operation of the ORC WHR system in supercritical conditions has a potential to generate more power output and thermal efficiency compared with the conventional subcritical conditions. However, in supercritical conditions, the heat transfer process in the evaporator, the key component of the ORC WHR system, becomes unpredictable as the thermo-physical properties of the working fluid change with the temperature. Furthermore, the transient heat source from the vehicle’s exhaust makes the operation of the WHR system difficult. We investigated the performance of the ORC WHR system at supercritical conditions with engine’s exhaust data from real city and highway drive cycles. The effects of operating variables, such as refrigerant flow rates, evaporator and condenser pressure, and evaporator outlet temperature, on the performance indicators of the WHR system in supercritical conditions were examined. Simulation of operating parameters and the boundary of the WHR system are also included in this paper.
History
Publication status
- Published
File Version
- Accepted version
Journal
Journal of Mechanical Science and TechnologyISSN
1738-494XPublisher
Springer VerlagExternal DOI
Issue
2Volume
31Page range
932-936Department affiliated with
- Engineering and Design Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2017-07-17First Open Access (FOA) Date
2018-02-20First Compliant Deposit (FCD) Date
2017-07-17Usage metrics
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