R1234ze及其混合工质的船舶余热TEG-ORC联合循环性能模拟与优化  

Performance simulation and optimization of ship waste heat TEG-ORC combined cycle based on R1234ze and its mixed working fluids

作　　者：柳长昕[1] 石飞雄 王锋 李怡然 乔广超 孙德平[1] 李华安 LIU Chang-xin;SHI Fei-xiong;WANG Feng;LI Yi-ran;QIAO Guang-chao;SUN De-ping;LI Hua-an(College of Marine Engineering,Dalian Maritime University,Dalian 116026,Liaoning,China;Angang Dellin Logistics Port Supply Chain Service Co.,Ltd.,Anshan 114000,Liaoning,China)

机构地区：[1]大连海事大学轮机工程学院,辽宁大连116026 [2]鞍钢德邻陆港供应链服务有限公司,辽宁鞍山114000

出　　处：《交通运输工程学报》2025年第1期160-171,共12页Journal of Traffic and Transportation Engineering

基　　金：国家重点研发计划(2021YFA1201604)。

摘　　要：为提高船舶航行中的能源效率,以船舶余热为研究对象,研究了基于温差发电-有机朗肯(TEG-ORC)联合循环的船舶余热回收系统中的工质选择问题;构建了TEG-ORC联合循环系统热力学和经济性模型,分别研究了采用R1234ze单工质和R245fa/R1234ze混合工质时联合循环系统的性能参数;将系统输出功率、热效率和发电成本作为评价指标,对比了采用不同混合比时系统的输出性能;以系统最高输出功率和最低发电成本作为优化分析的指标,明确了采用混合工质时该联合循环系统的最优配置。分析结果表明:采用R1234ze单工质时联合循环系统最大输出功率为1836 W,最小发电成本为0.493元·(kW·h)^(-1),最大热效率为17.09%;随着混合工质中R245fa组分的不断增大,相对于R1234ze单工质,系统的输出功率最大提高了12%;相对于R245fa单工质,系统的发电成本最大降低了54%,对应的输出功率提高了10%;确定了R245fa/R1234ze的最优混合比为0.9,此时系统最大输出功率为2076 W,最小发电成本为0.231元·(kW·h)^(-1),最大热效率为34.5%;相对于采用R1234ze单工质,采用混合工质的系统最大输出功率提高了13%,最大热效率提高了102%,最小发电成本降低了53%;在系统采用最优混合比工质时确定了系统最佳输出功率为2076 W,此时TEG模块数量为33,工质流速为0.06 kg·s^(-1),蒸发压力为1000 kPa。可见采用混合工质进一步提升了联合循环系统输出性能以及对于冷热源匹配性。To improve the energy efficiency of ships during navigation,the ship waste heat was taken as the research object,and the problem of working fluid selection in the ship waste heat recovery system based on the combined thermoelectric generation-organic Rankine cycle(TEG-ORC) was studied.The thermodynamic and economic models of the TEG-ORC combined cycle system were constructed.The performance parameters of the combined cycle system were studied by using R1234ze single working fluid and R245fa/R1234ze mixed working fluid respectively.The system output power,thermal efficiency,and power-production cost were taken as evaluation indicators,and the output performances of the system with different mixing ratios were compared.By taking the highest system output power and the lowest power-production cost as indicators for optimization analysis,the optimal configuration of the combined cycle system with the mixed working fluid was determined.Analysis results show that when R1234ze single working fluid is used,the maximum output power of the combined cycle system is 1 836 W,the minimum power-production cost is 0.493 yuan·(kW·h)^(-1),and the maximum thermal efficiency is 17.09%.As the proportion of R245fa component in the mixed working fluid increases continuously,compared with the R1234ze single working fluid,the system output power increases by up to 12%.Compared with the R245fa single working fluid,the power-production cost of the system decreases by up to 54%,and the corresponding output power increases by 10%.The optimal mixing ratio of R245fa/R1234ze is determined to be 0.9.At this time,the maximum system output power is 2 076 W,and the minimum power-production cost is 0.231 yuan·(kW·h)^(-1),the maximum thermal efficiency is 34.5%.Compared with using the R1234ze single working fluid,the system with the mixed working fluid has a 13% increase in the maximum output power,a 102% increase in the maximum thermal efficiency,and a 53% reduction in the minimum power-production cost.When the system uses the working fluid with

关 键 词：船舶能效 余热回收 TEG-ORC联合循环 混合工质 仿真模拟 

分 类 号：U662[交通运输工程—船舶及航道工程]