A combined organic Rankine cycle (ORC) was proposed for both engine coolant energy recovery (CER) and exhaust energy recovery (EER), and it was applied to a gasoline direct injection (GDI) engine to verify its waste heat recovery (WHR) potential. After several kinds of organic working medium were compared, R123 was selected as the working fluid of this ORC. Two cycle modes, low-temperature cycle and high-temperature cycle, were designed according to the evaporation way of working fluid. The working fluid is evaporated by coolant heat in low-temperature cycle but by exhaust heat in high-temperature cycle. The influence factors of cycle performance and recovery potential of engine waste heat energy were investigated by cycle simulation and parametric analysis. The results show that recovery efficiency of waste heat energy is influenced by both engine operating conditions and cycle parameters. At 2000 r/min, the maximum recovery efficiency of waste heat energy is 7.3% under 0.2 MPa brake mean effective pressure (BMEP) but 10.7% under 1.4 MPa BMEP. With the combined ORC employed, the fuel efficiency improvement of engine comes up to 4.7% points under the operations of 2000 r/min and 0.2 MPa BMEP, while it further increases to 5.8% points under the operations of 2000 r/min and 1.4 MPa BMEP. All these indicate that the combined ORC is suitable for internal combustion (IC) engine WHR.
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November 2017
Research-Article
A Combined Organic Rankine Cycle With Double Modes Used for Internal Combustion Engine Waste Heat Recovery
Guohui Zhu,
Guohui Zhu
State Key Laboratory of Advanced Design
and Manufacturing for Vehicle Body,
Hunan University,
Changsha 410082, China
e-mail: zhugh1219@126.com
and Manufacturing for Vehicle Body,
Hunan University,
Changsha 410082, China
e-mail: zhugh1219@126.com
Search for other works by this author on:
Jingping Liu,
Jingping Liu
State Key Laboratory of Advanced Design
and Manufacturing for Vehicle Body,
Hunan University,
Changsha 410082, China
e-mail: liujp0426@163.com
and Manufacturing for Vehicle Body,
Hunan University,
Changsha 410082, China
e-mail: liujp0426@163.com
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Jianqin Fu,
Jianqin Fu
State Key Laboratory of Advanced Design
and Manufacturing for Vehicle Body,
Hunan University,
Changsha 410082, China;
and Manufacturing for Vehicle Body,
Hunan University,
Changsha 410082, China;
Key Laboratory of Low-grade Energy
Utilization Technologies and Systems,
Ministry of Education of China,
Chongqing University,
Chongqing 400044, China
e-mail: fujianqinabc@163.com
Utilization Technologies and Systems,
Ministry of Education of China,
Chongqing University,
Chongqing 400044, China
e-mail: fujianqinabc@163.com
Search for other works by this author on:
Shuqian Wang
Shuqian Wang
State Key Laboratory of Advanced Design
and Manufacturing for Vehicle Body,
Hunan University,
Changsha 410082, China
e-mail: 1350800863@qq.com
and Manufacturing for Vehicle Body,
Hunan University,
Changsha 410082, China
e-mail: 1350800863@qq.com
Search for other works by this author on:
Guohui Zhu
State Key Laboratory of Advanced Design
and Manufacturing for Vehicle Body,
Hunan University,
Changsha 410082, China
e-mail: zhugh1219@126.com
and Manufacturing for Vehicle Body,
Hunan University,
Changsha 410082, China
e-mail: zhugh1219@126.com
Jingping Liu
State Key Laboratory of Advanced Design
and Manufacturing for Vehicle Body,
Hunan University,
Changsha 410082, China
e-mail: liujp0426@163.com
and Manufacturing for Vehicle Body,
Hunan University,
Changsha 410082, China
e-mail: liujp0426@163.com
Jianqin Fu
State Key Laboratory of Advanced Design
and Manufacturing for Vehicle Body,
Hunan University,
Changsha 410082, China;
and Manufacturing for Vehicle Body,
Hunan University,
Changsha 410082, China;
Key Laboratory of Low-grade Energy
Utilization Technologies and Systems,
Ministry of Education of China,
Chongqing University,
Chongqing 400044, China
e-mail: fujianqinabc@163.com
Utilization Technologies and Systems,
Ministry of Education of China,
Chongqing University,
Chongqing 400044, China
e-mail: fujianqinabc@163.com
Shuqian Wang
State Key Laboratory of Advanced Design
and Manufacturing for Vehicle Body,
Hunan University,
Changsha 410082, China
e-mail: 1350800863@qq.com
and Manufacturing for Vehicle Body,
Hunan University,
Changsha 410082, China
e-mail: 1350800863@qq.com
1Corresponding author.
Contributed by the IC Engine Division of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received December 14, 2016; final manuscript received May 21, 2017; published online June 27, 2017. Assoc. Editor: David L. S. Hung.
J. Eng. Gas Turbines Power. Nov 2017, 139(11): 112804 (9 pages)
Published Online: June 27, 2017
Article history
Received:
December 14, 2016
Revised:
May 21, 2017
Citation
Zhu, G., Liu, J., Fu, J., and Wang, S. (June 27, 2017). "A Combined Organic Rankine Cycle With Double Modes Used for Internal Combustion Engine Waste Heat Recovery." ASME. J. Eng. Gas Turbines Power. November 2017; 139(11): 112804. https://doi.org/10.1115/1.4036955
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