A Study on Working Fluid Selection for Organic Rankine Cycle of Engine Waste Heat

被引：0
|
作者：
Dai X. [1 ]
An Q. [2 ]
Shi L. [1 ]
Zhai H. [1 ]
机构：
[1] Key Laboratory of Thermal Science and Power Engineering of Ministry of Education of China, Department of Thermal Engineering, Tsinghua University, Beijing
[2] Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, School of Mechanical Engineering, Tianjin University, Tianjin
来源：
Qiche Gongcheng/Automotive Engineering | 2017年 / 39卷 / 02期
关键词：
Critical temperature; Engine waste heat; Molecular complexity; ORC; Working fluid evaluation;
D O I：
10.19562/j.chinasae.qcgc.2017.02.001
中图分类号：
学科分类号：
摘要：
The waste heat of automotive engine is a high quality resource with high potential of energy recovery, so is suitable for energy recovery by using organic Rankine cycle (ORC). In this paper, based on the features of ORC for the waste heat of internal combustion engine, the conditions for working fluid selection are proposed, and according to the performance and cost analyses of real system, a system evaluation scheme is put forward with the total net work done, thermal efficiency and the volumetric flow ratio and size parameter of expander as evaluation indicators to evaluate candidate working fluids. The results show that the behavior of working fluids mainly related with critical temperature and molecular complexity. The performance of ORC system is positively correlated to the critical temperature of working fluid while the cost of system is positively correlated to the molecular complexity of working fluid. As a result, the working fluid R1233zd(E) with a higher critical temperature and a relatively lower molecular complexity is the best choice among seven working fluid candidates. © 2017, Society of Automotive Engineers of China. All right reserved.
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页码：121 / 126
页数：5
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