船用双燃料发动机ORC系统的热经济性优化

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-11-14 DOI:10.1177/14750902231207128

Mehmet Akman, Selma Ergin

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引用次数: 0

摘要

有机朗肯循环(ORC)是最有前途的回收内燃机余热的系统之一。本文针对某双燃料船用发动机与废气再循环(EGR)系统集成，对基于有机朗肯循环的清风冷却水余热回收系统(WHRS)进行了热力学、经济和环境分析。零臭氧消耗和低全球变暖潜能值的工作流体;选用来自氢氟烃的R245fa、R236ea、来自碳氢化合物的R600a、R601a、来自氢氟烯烃的R1234ze和R1234yf作为低品位WHRS。除了热分析外，还评估了系统的质量和体积以及工作流体的安全系数，以判断系统在船舶上的物理适用性。通过分析、优化和比较不同发动机载荷、Tier II和Tier III模式下液体的热经济性能，揭示不同发动机工况对参数的影响。结果表明，在中、重载工况下，后置空气产生了大量的余热，发动机模式的切换对后置空气的性能有显著影响。R601a表现出最好的热经济性能，然而，考虑到系统的适用性，R236ea是最适合ORC WHRS的工作流体。发电系统的整体热效率可提高2.8%左右。

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Thermo-economic optimization of an ORC system for a dual-fuel marine engine

The Organic Rankine Cycle (ORC) is one of the most promising systems to recover the waste heat sourced from internal combustion engines. In this study, thermodynamic, economic and environmental analyses of the scavenge air cooling water-driven Waste Heat Recovery System (WHRS) based on the organic Rankine cycle are conducted for a dual-fuel marine engine integrated with exhaust gas recirculation (EGR) system. Zero ozone-depleting and low global warming potential working fluids; R245fa, R236ea from hydrofluorocarbons, R600a, R601a from hydrocarbons, R1234ze and R1234yf from hydrofluoroolefins are selected for the low-grade WHRS. In addition to the thermal analyses, the mass and volume of the system along with the safety factors of the working fluids are evaluated to judge the physical applicability of the system for ships. Thermo-economic performances of the fluids are analyzed, optimized and compared under various engine loads, Tier II and Tier III modes to reveal the effects of different engine operating conditions on the parameters. According to the results, scavenge air has a significant amount of waste heat at medium and heavy loads and switching the engine mode remarkably affects the performance of the WHRS. R601a shows the best thermo-economic performance, however, considering the applicability of the system R236ea is the most suitable working fluid for the ORC WHRS. The overall thermal efficiency of the power generation system can be increased by about 2.8%.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.