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首页> 外文期刊>Journal of engineering thermophysics >Conversion of Low-Grade Heat from FCC Absorption-Stabilization System to Electricity by Organic Rankine Cycles: Simulation and Optimization
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Conversion of Low-Grade Heat from FCC Absorption-Stabilization System to Electricity by Organic Rankine Cycles: Simulation and Optimization

机译：通过有机朗肯循环将低级热从FCC吸收稳定系统转化为电力：仿真和优化

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摘要

In this study, the organic Rankine cycle (ORC) is applied to be integrated into the fluid catalytic cracking (FCC) absorption-stabilization system to extract and convert the low-grade process heat to electricity. This newly integrated system is simulated by the Aspen Plus software. For the simulation, eleven different dry and isentropic working fluids are selected to investigate the energy conversion performance of the incorporated ORC system. It is found that, the performance depends highly on the operational parameters, such as mass flow rate and the evaporation pressure of the working fluids, outlet temperature of the process stream. After optimization, the working fluids R124 and R227ea are determined to be the best candidates due to their highest output net work in HCT (high critical temperature) and LCT (low critical temperature) working fluids, respectively. A further optimization has been conducted based on the economic evaluations (i.e., electricity production cost (EPC) and total annual profit (TAP)). Results show that, for the HCT working fluids, the use of working fluid of R245fa allows the EPC to be the lowest, while the application of R124 obtains the highest TAP. For the LCT working fluids, R227ea is the best choice due to its lowest EPC and highest TAP.
机译：在本研究中，有机朗肯循环（ORC）被应用于流化催化裂化（FCC）吸收稳定系统中，以提取低品位工艺热并将其转化为电能。这个新集成的系统由Aspen Plus软件模拟。为了进行模拟，选择了11种不同的干燥和等熵工质，研究了合并的ORC系统的能量转换性能。研究发现，性能在很大程度上取决于操作参数，如工作液的质量流量和蒸发压力、工艺流的出口温度。经过优化后，工作液R124和R227ea被确定为最佳候选，因为它们在HCT（高临界温度）和LCT（低临界温度）工作液中的输出净功分别最高。根据经济评估（即发电成本（EPC）和年总利润（TAP））进行了进一步优化。结果表明，对于HCT工质，使用R245fa工质可使EPC最低，而使用R124可获得最高抽头。对于LCT工作液，R227ea是最佳选择，因为其EPC最低，抽头最高。

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    Sui H.; Wu J.; He L.; Li X.;

  • 作者单位

    Tianjin Univ Sch Chem Engn &

    Technol Tianjin 30007 Peoples R China;

    Tianjin Univ Sch Chem Engn &

    Technol Tianjin 30007 Peoples R China;

    Tianjin Univ Sch Chem Engn &

    Technol Tianjin 30007 Peoples R China;

    Tianjin Univ Sch Chem Engn &

    Technol Tianjin 30007 Peoples R China;

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  • 正文语种 eng
  • 中图分类 热力工程、热机;
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