基于分子动力学的有机朗肯循环Cu/R123纳米有机工质能量研究  

ergy analysis of a Cu/R123 nano-organic working fluidbased on molecular dynamicsin organic Rankine cycle

作　　者：杨新乐[1] 闫振超 马联伟 王晓鹏 于宁[1] 宗德敬 王新[1] YANG Xinle;YAN Zhenchao;MA Lianwei;WANG Xiaopeng;YU Ning;ZONG Dejing;WANG Xin(School of Mechanical Engineering,Liaoning Technical University,Fuxin123000,China;Taiyuan Research Institute,China Coal Science and Industry Group CompanyLimited,Taiyuan030006,China;Shandong Electric Power Construction First Engineering CompanyLimited,China Electric Power Construction Group,Jinan 250000,China)

机构地区：[1]辽宁工程技术大学机械工程学院,辽宁阜新123000 [2]中国煤炭科工集团有限公司太原研究院,山西太原030006 [3]中国电建集团山东电力建设第一工程有限公司,山东济南250000

出　　处：《辽宁工程技术大学学报（自然科学版）》2024年第5期610-617,共8页Journal of Liaoning Technical University (Natural Science)

基　　金：辽宁省自然科学基金项目(2022-MS-398);辽宁省教育厅科研项目(JYTMS20230803,LJKMZ20220685);辽宁工程技术大学鄂尔多斯研究院校地科技合作培育项目(YJY-XD-2023-007)。

摘　　要：为探究有机朗肯循环(ORC)Cu/R123纳米有机工质的能量变化特性,采用分子动力学方法,对不同工况下的Cu/R123纳米有机工质能量进行模拟。研究结果表明:加入纳米颗粒可使有机工质微观结构发生改变。在微观状态下,范德华能随体积分数增大而减小,键合能随温度升高而增加,气相时范德华能增大,压力对体系影响很小。通过计算焓差发现,在相同蒸发温度下,采用纳米有机工质的ORC做功较大;纳米有机工质具有较高的导热系数,可提升ORC低品位热能回收效率。To investigate the energy variation characteristics of the Cu/R123 nano-organic working fluidin organic Rankine cycle(ORC),molecular dynamics simulations were conducted to analyze the energy behavior of the Cu/R123 nano-organic working fluidunder different operating conditions.The results indicate that the addition of nanoparticles can alter the microstructure of the organic working fluid.Specifically,in a microscopic state,van der Waals energy decreases with increasing volume fraction,bond energy increases with rising temperature,van der Waals energy increases in gasphase,and pressure has minimal impact on the system.Furthermore,calculation of enthalpy difference reveals that at equivalent evaporation temperatures,ORC using nano-organic working medium performs more work.Additionally,it is observed that nano organic working medium exhibits high thermal conductivity which can enhance low-grade heat recovery efficiency of the ORC.

关 键 词：纳米有机工质 分子动力学 两相流 能量分析 有机朗肯循环 

分 类 号：TK121[动力工程及工程热物理—工程热物理]