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Exergy Losses in the Szewalski Binary Vapor Cycle

机译：Szewalski二元蒸气循环中的火用损失

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In this publication, we present an energy and exergy analysis of the Szewalski binary vapor cycle based on a model of a supercritical steam power plant. We used energy analysis to conduct a preliminary optimization of the cycle. Exergy loss analysis was employed to perform a comparison of heat-transfer processes, which are essential for hierarchical cycles. The Szewalski binary vapor cycle consists of a steam cycle bottomed with an organic Rankine cycle installation. This coupling has a negative influence on the thermal efficiency of the cycle. However, the primary aim of this modification is to reduce the size of the power unit by decreasing the low-pressure steam turbine cylinder and the steam condenser. The reduction of the “cold end” of the turbine is desirable from economic and technical standpoints. We present the Szewalski binary vapor cycle in addition to a mathematical model of the chosen power plant’s thermodynamic cycle. We elaborate on the procedure of the Szewalski cycle design and its optimization in order to attain an optimal size reduction of the power unit and limit exergy loss.
机译：在本出版物中，我们基于超临界蒸汽发电厂的模型对Szewalski二元蒸汽循环进行了能量和火用分析。我们使用能量分析对周期进行了初步优化。火用损失分析用于进行传热过程的比较，这对于分层循环至关重要。 Szewalski二元蒸气循环由一个底部装有有机朗肯循环装置的蒸气循环组成。这种耦合对循环的热效率有负面影响。然而，该修改的主要目的是通过减小低压蒸汽涡轮机汽缸和蒸汽冷凝器来减小动力单元的尺寸。从经济和技术角度来看，减少涡轮机的“冷端”是可取的。除了所选电厂热力学循环的数学模型外，我们还介绍了Szewalski二元蒸气循环。我们详细介绍了Szewalski循环设计的过程及其优化过程，以实现功率单元的最佳尺寸减小并限制火用损失。

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