在非设计条件下确定发电厂冷凝器中的蒸汽冷凝压力

IF 0.8 Q4 THERMODYNAMICS

Archives of Thermodynamics Pub Date : 2023-07-20 DOI:10.24425/ather.2021.138109

R. Laskowski, A. Smyk, A. Ruciński, Jacek

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引用次数: 0

摘要

本文给出了在不同设计条件下确定电厂冷凝器中蒸汽冷凝压力的公式。文中提供的数学模型使得可以根据冷凝蒸汽压力、冷凝器出口处的冷却水温度和冷凝器的温度来计算冷凝器的性能，以及冷凝器在可变负载条件下的效率，作为三个输入特性的函数：冷凝器入口处冷却水的温度和质量流量以及蒸汽的质量流量。该数学模型考虑了参考条件下出现的特性值，但不包含必须根据冷凝器技术规范数据或测量数据建立的常数系数。由于不存在这样的常数系数，本文提出的凝汽器模型具有普遍适用性。根据冷凝器中的保修测量值和200MW蒸汽发电机组运行期间收集的测量数据，对所提出的方程进行了检查。根据分析，可以得出结论，在设计条件不同的情况下，所提出的确定冷凝器压力的方法会以足够的精度影响冷凝器的性能。该模型可用于发电机组性能的优化和诊断分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Determining steam condensation pressure in a power plant condenser in off-design conditions

The paper presents formulas which can be used to determine steam condensation pressure in a power plant condenser in oﬀ-design conditions. The mathematical model provided in the paper makes it possible to calculate the performance of the condenser in terms of condensing steam pressure, cooling water temperature at the condenser outlet, and condenser eﬀectiveness under variable load conditions as a function of three input properties: the temperature and the mass ﬂow rate of cooling water at the condenser inlet and the mass ﬂow rate of steam. The mathematical model takes into account values of properties occurring in reference conditions but it contains no constant coeﬃcients which would have to be established based on data from technical speciﬁcations of a condenser or measurement data. Since there are no such constant coeﬃcients, the model of the steam condenser proposed in the paper is universally applicable. The proposed equations were checked against warranty measurements made in the condenser and measurement data gathered during the operation of a 200 MW steam power unit. Based on the analysis, a conclusion may be drawn that the proposed means of determining pressure in a condenser in oﬀ-design conditions reﬂects the condenser performance with suﬃcient accuracy. This model can be used in optimization and diagnostic analyses of the performance of a power generation unit.

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来源期刊

Archives of Thermodynamics THERMODYNAMICS-

CiteScore

1.80

自引率

22.20%

发文量

期刊介绍： The aim of the Archives of Thermodynamics is to disseminate knowledge between scientists and engineers interested in thermodynamics and heat transfer and to provide a forum for original research conducted in Central and Eastern Europe, as well as all over the world. The journal encompass all aspect of the field, ranging from classical thermodynamics, through conduction heat transfer to thermodynamic aspects of multiphase flow. Both theoretical and applied contributions are welcome. Only original papers written in English are consider for publication.