TY - JOUR
T1 - Thermodynamic analysis and optimization of four organic flash cycle systems for waste heat recovery
AU - Wang, Qi
AU - Wu, Weifeng
AU - Li, Dantong
AU - Wang, Jiangfeng
AU - He, Zhilong
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/10/1
Y1 - 2020/10/1
N2 - The basic organic flash cycle (BOFC) system has difficulty in achieving the high system efficiency due to the great exergy destruction of the throttling process. To reduce the energy loss and increase the BOFC system's efficiency, three improved systems including the regenerative organic flash cycle (ROFC) system and two novel organic flash Rankine cycle (OFRC) systems were presented in this work. Thermodynamic analysis including energy, exergy and economic analysis were conducted to evaluate the performance of the system, and system optimization based on the particle swarm optimization (PSO) algorithm was performed to indicate the development potential of the system. In addition, performance comparison between four OFC systems and the basic organic Rankine cycle (BORC) system was also carried out. Obtained results showed that the largest exergy destruction of both the BOFC system and the ROFC system was caused by the throttling process, while the biggest energy loss of the two OFRC systems was caused by the heat transfer process in the heat recovery unit. Compared with the ROFC system and the OFRC-I system, the OFRC-II system was considered to be the most promising solution in enhancing the performance of the BOFC system. Finally, optimization results showed that the OFRC-II system had the higher global thermal and exergy efficiencies, compared to the BORC system.
AB - The basic organic flash cycle (BOFC) system has difficulty in achieving the high system efficiency due to the great exergy destruction of the throttling process. To reduce the energy loss and increase the BOFC system's efficiency, three improved systems including the regenerative organic flash cycle (ROFC) system and two novel organic flash Rankine cycle (OFRC) systems were presented in this work. Thermodynamic analysis including energy, exergy and economic analysis were conducted to evaluate the performance of the system, and system optimization based on the particle swarm optimization (PSO) algorithm was performed to indicate the development potential of the system. In addition, performance comparison between four OFC systems and the basic organic Rankine cycle (BORC) system was also carried out. Obtained results showed that the largest exergy destruction of both the BOFC system and the ROFC system was caused by the throttling process, while the biggest energy loss of the two OFRC systems was caused by the heat transfer process in the heat recovery unit. Compared with the ROFC system and the OFRC-I system, the OFRC-II system was considered to be the most promising solution in enhancing the performance of the BOFC system. Finally, optimization results showed that the OFRC-II system had the higher global thermal and exergy efficiencies, compared to the BORC system.
KW - Organic Rankine cycle
KW - Organic flash cycle
KW - Particle swarm optimization
KW - Thermodynamic analysis
KW - Waste heat recovery
UR - https://www.scopus.com/pages/publications/85088360763
U2 - 10.1016/j.enconman.2020.113171
DO - 10.1016/j.enconman.2020.113171
M3 - 文章
AN - SCOPUS:85088360763
SN - 0196-8904
VL - 221
JO - Energy Conversion and Management
JF - Energy Conversion and Management
M1 - 113171
ER -
