600MW火电机组热力系统的火用分析.docVIP

摘 要 在这篇研究论文里，为了评价系统性能，我们采用及经济学的方法来决定蒸汽透平电厂每一部分的损失和系统每一流程的成本。一项完整参数的研究也研究了像效率及关于系统性能变化的损总成本。分析结果揭示了，与其他循环部分相比，燃烧室是系统最主要的损失部分。并且他的效率低于其他部分，这是由于在工质和炉膛温度之间存在很高的传热温差。另外，通过提高蒸汽透平入口温度可以降低这部分的损失。另一方面，燃烧室里由于损失造成的成本很高。因此，提高蒸汽透平入口温度是改善循环损失的最佳选择。通过本文的研究可知，分析是一种评价热力系统中各设备及其过程性能价值的方法。分析方法包括确定一系列能量转换过程中不同状态点的值。分析结果为人们在提高蒸汽透平电厂的效率、经济性和环境指标方面指明了努力方向。 关键词 蒸汽透平 效率 损失 分析 ABSTRACT In this research paper, to assess system performance, exergy and exergo-economic analyses are conducted to determine the exergy destruction of each component and cost of each flow line of the system.A complete parametric study is also carried out to study the effect of certain design parameters such as exergy efficiency and total cost of exergy destruction on system performance variation. The exergy analysis results revealed that the combustion chamber (CC) is the most exergy destructive component compared to other cycle components. Also, its exergy efficiency is less than other components, which is due to the high temperature difference between working fluid and burner temperature. In addition, it was found that by increasing the TIT (turbine inlet temperature), the exergy destruction of this component can be reduced. On the other hand,the cost of exergy destruction, which is a direct function of exergy destruction, is high for the combustion chamber. Therefore, TIT is the best option to improve cycle losses.According to literature, exergy analysis is a methodology for the evaluation of the performance of devices and processes, and involves examining the exergy at different points in a series of energy-conversion steps . Exergy analysis results can aid efforts to improve the efficiency, and possibly the economic and environmental performance of turbine power plants. Keywords: turbine power plant, Exergy analysis, Efficiency, Exergy destruction, Economic analysis 目 录 摘 要 1 ABSTRACT 2 目 录 3 第一章 绪 论 1 1.1 课题研究的背景 1 1.2 课