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首页> 外文期刊>Applied Energy >Performance analysis of a dual-loop organic Rankine cycle (ORC) system with wet steam expansion for engine waste heat recovery
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Performance analysis of a dual-loop organic Rankine cycle (ORC) system with wet steam expansion for engine waste heat recovery

机译：具有湿蒸汽膨胀以回收发动机废热的双回路有机朗肯循环（ORC）系统的性能分析

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摘要

A dual-loop organic Rankine cycle (ORC) system is designed to recover the waste heat of a diesel engine. The high-temperature (HT) loop utilizes the heat load of the engine exhaust gas, and the low-temperature (LT) loop uses the heat load of the jacket cooling water and the residual heat of the HT loop sequentially. These two loops are coupled via a shared heat exchanger. Water is selected as the working fluid for the HT loop and wet steam expansion, which can be implemented through screw expanders, is exploited. The dryness fraction of the wet steam at the inlet of the expander can be adjusted to attain a suitable evaporation temperature and provide a better temperature match with the heat source. The working fluid candidates for the LT loop are chosen to be R123, R236fa and R245fa. The influence of the HT loop parameters on the performance of the LT loop is evaluated. The simulation results reveal that under different operating conditions of the HT loop, the pinch point of the LT loop occurs at different locations and therefore, results in different evaporation temperatures and other thermal parameters. The maximum net power output of the dual-loop ORC system reaches 115.1 kW, which leads to an increase of 11.6% on the original power output of the diesel engine. (C) 2015 Elsevier Ltd. All rights reserved.
机译：双回路有机朗肯循环（ORC）系统旨在回收柴油机的废热。高温（HT）回路利用发动机废气的热负荷，而低温（LT）回路依次利用夹套冷却水的热负荷和HT回路的余热。这两个回路通过一个共享的热交换器耦合。选择水作为HT回路的工作流体，并利用可通过螺杆膨胀机实现的湿蒸汽膨胀。可以调节膨胀机入口处湿蒸汽的干度，以达到合适的蒸发温度，并提供与热源更好的温度匹配。 LT回路的候选工作流体选择为R123，R236fa和R245fa。评估HT回路参数对LT回路性能的影响。仿真结果表明，在HT回路的不同工作条件下，LT回路的收缩点出现在不同的位置，因此会导致不同的蒸发温度和其他热参数。双回路ORC系统的最大净功率输出达到115.1 kW，这使柴油发动机的原始功率输出增加了11.6％。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Applied Energy》 |2015年第15期|280-289|共10页
  • 作者

    Song Jian; Gu Chun-wei;

  • 作者单位

    Tsinghua Univ, Dept Thermal Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China.;

    Tsinghua Univ, Dept Thermal Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, 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

    ORC; Dual-loop system; Wet steam expansion; Engine waste heat recovery;

    机译：ORC;双回路系统;湿蒸汽膨胀;发动机余热回收;

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