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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

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posted on 2023-06-09, 07:12 authored by Jahedul Islam Chowdhury, Bao Kha NguyenBao Kha Nguyen, David Thornhill
Waste 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 Technology

ISSN

1738-494X

Publisher

Springer Verlag

Issue

2

Volume

31

Page range

932-936

Department affiliated with

  • Engineering and Design Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2017-07-17

First Open Access (FOA) Date

2018-02-20

First Compliant Deposit (FCD) Date

2017-07-17

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