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Comparative analysis of an organic Rankine cycle with different turbine efficiency models based on multi-objective optimization

机译：基于多目标优化的不同汽轮机效率模型的有机朗肯循环对比较分析

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摘要

The radial-inflow turbine is a key component of the organic Rankine cycle (ORC) system, and its efficiency is related to working fluid properties and working conditions. In this paper, multi-objective algorithm was employed to conduct a comparative analysis of an ORC system with different turbine efficiency models (constant and variable). The system thermal efficiency and multi-objective optimization results between the constant turbine efficiency ORC system (CTORC) and the variable turbine efficiency ORC system (VTORC) were compared, and the reasons for the difference between the CTORC and VTORC system were analyzed. Sensitivity analysis was performed to compare the difference between the CTORC system and the VTORC system at different waste flue gas inlet temperature. The results show that the system thermal efficiency of both the CTORC and the VTORC increases with the increasing evaporation temperature and decreases with the increasing condensation temperature, while the variation rate of system thermal efficiency is different between CTORC system and VTORC system. The predicted turbine efficiency is significantly different for different working fluids and different working conditions. Considering the system comprehensive performance, R236ea is the optimal working fluid for the CTORC system, while R365mfc is for the VTORC system. For different working fluids, the error caused by using constant turbine efficiency model is different. With the increasing waste flue gas inlet temperature, the error caused by using constant turbine efficiency increases for R236ea, while the error caused by using constant turbine efficiency increases first and then decreases for R365mfc.
机译：径向流入涡轮机是有机朗肯循环（ORC）系统的关键部件，其效率与工作流体性质和工作条件有关。本文采用多目标算法进行不同涡轮效率模型的兽人系统的比较分析（恒定和变量）。比较了恒动涡轮效率兽人系统（CTORC）与可变涡轮效率兽人系统（VTORC）之间的系统热效率和多目标优化结果，分析了CTORC和VTORC系统之间差异的原因。进行敏感性分析以比较CTORC系统与VTORC系统在不同废物烟气入口温度下的差异。结果表明，CTORC和VTORC的系统热效率随着蒸发温度的增加而增加，随着冷凝温度的增加而降低，而CTORC系统和VTORC系统之间的变化率是不同的。对于不同的工作流体和不同的工作条件，预测的涡轮效率显着不同。考虑到系统综合性能，R236EA是CTORC系统的最佳工作流体，而R365MFC是VTORC系统。对于不同的工作流体，使用恒定涡轮效率模型引起的误差是不同的。随着废物烟气入口温度的增加，使用恒定涡轮效率引起的误差对于R236EA增加，而采用恒定涡轮效率引起的误差首先增加，然后对R365MFC的降低。

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  • 来源
    《Energy Conversion & Management》 |2019年第4期|130-142|共13页
  • 作者

    Li Peng; Han Zhonghe; Jia Xiaoqiang; Mei Zhongkai; Han Xu; Wang Zhi;

  • 作者单位

    North China Elect Power Univ Sch Energy Power & Mech Engn Key Lab Condit Monitoring & Control Power Plant E Baoding 071000 Peoples R China;

    North China Elect Power Univ Sch Energy Power & Mech Engn Key Lab Condit Monitoring & Control Power Plant E Baoding 071000 Peoples R China;

    North China Elect Power Univ Sch Energy Power & Mech Engn Key Lab Condit Monitoring & Control Power Plant E Baoding 071000 Peoples R China;

    North China Elect Power Univ Sch Energy Power & Mech Engn Key Lab Condit Monitoring & Control Power Plant E Baoding 071000 Peoples R China;

    North China Elect Power Univ Sch Energy Power & Mech Engn Key Lab Condit Monitoring & Control Power Plant E Baoding 071000 Peoples R China;

    North China Elect Power Univ Sch Energy Power & Mech Engn Key Lab Condit Monitoring & Control Power Plant E Baoding 071000 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Organic Rankine cycle; Constant turbine efficiency; Variable turbine efficiency; System thermal efficiency; Multi-objective optimization;

    机译：有机朗肯循环;恒涡轮机效率;可变涡轮效率;系统热效率;多目标优化;

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