Toward the Integrated Design of Organic Rankine Cycle Power Plants: A Method for the Simultaneous Optimization of Working Fluid, Thermodynamic Cycle, and Turbine
Toward the Integrated Design of Organic Rankine Cycle Power Plants: A Method for the Simultaneous Optimization of Working Fluid, Thermodynamic Cycle, and Turbine
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DOI：
10.1115/1.4044380
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发表时间：
2019-10
期刊：
影响因子：
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通讯作者：
M. Lampe;C. D. Servi;J. Schilling;A. Bardow;P. Colonna
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文献类型：
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作者：
M. Lampe;C. D. Servi;J. Schilling;A. Bardow;P. Colonna
传统的有机朗肯循环（ORC）动力系统的设计从工质的选择和相应热力循环的优化开始。最近，已经提出了将工作流体的选择集成到热力循环的优化中的系统方法。然而，在这两种情况下，随后设计涡轮机。该程序可能导致次优设计，特别是在小型和小型ORC系统的情况下，因为工作流体和操作条件的预选组合可能导致不可行的涡轮机设计。由于所涉及的许多设计变量和约束的强烈相互依赖性，在多次尝试和错误尝试之后，由此产生的迭代设计过程可能以保守的解决方案结束。在这项工作中，因此，我们提出了一种新的设计和优化方法，结合工作流体的选择，热力循环设计，初步涡轮机设计。为此，我们最近的1级连续分子靶向（CoMT）-计算机辅助分子设计（CAMD）的ORC过程和工作流体的集成设计方法扩展的涡轮机中线设计程序。因此，优化的搜索空间被限制到涡轮机的设计可行的区域。该方法已被测试的小型高温ORC单元的设计，采用径向流入涡轮膨胀机。结果证实了所提出的方法的潜力，在传统的迭代设计实践的小型ORC汽轮发电机的设计。
The conventional design of organic Rankine cycle (ORC) power systems starts with the selection of the working fluid and the subsequent optimization of the corresponding thermodynamic cycle. More recently, systematic methods have been proposed integrating the selection of the working fluid into the optimization of the thermodynamic cycle. However, in both cases, the turbine is designed subsequently. This procedure can lead to a suboptimal design, especially in the case of mini- and small-scale ORC systems, since the preselected combination of working fluid and operating conditions may lead to infeasible turbine designs. The resulting iterative design procedure may end in conservative solutions after multiple trial-and-error attempts due to the strong interdependence of the many design variables and constraints involved. In this work, we therefore present a new design and optimization method integrating working fluid selection, thermodynamic cycle design, and preliminary turbine design. To this purpose, our recent 1-stage continuous-molecular targeting (CoMT)-computer-aided molecular design (CAMD) method for the integrated design of the ORC process and working fluid is expanded by a turbine meanline design procedure. Thereby, the search space of the optimization is bounded to regions where the design of the turbine is feasible. The resulting method has been tested for the design of a small-scale high-temperature ORC unit adopting a radial-inflow turbo-expander. The results confirm the potential of the proposed method over the conventional iterative design practice for the design of small-scale ORC turbogenerators.