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The optimum pressure for working fluid in feed water heaters of steam power plants

机译:蒸汽发电厂给水加热器中工作流体的最佳压力

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The aim of this study is to find the optimal water pressure and percentage of supply vapour in the feed water heaters (fwhs) of steam power plants, such that they maximize the thermal efficiency of the Rankine cycle within pre-specified values of minimum and maximum pressures of the thermodynamic cycle. Thermal efficiency is defined as a function of unknown variables (fluid pressure and vapour percentage of each fwh), and it is maximized numerically using the nonlinear constraint optimization method. Precise values of enthalpy are used in computations of thermal efficiency during the nonlinear optimization process. The enthalpy and entropy values at different points of the thermodynamic cycle are calculated utilizing the industrial formulation of IAPWS-IF97.
机译:这项研究的目的是在蒸汽发电厂的给水加热器(fwhs)中找到最佳的水压和供应蒸汽的百分比,以使兰金循环的热效率在预定的最小值和最大值之间最大化。热力学循环的压力。热效率定义为未知变量(每个fwh的流体压力和蒸汽百分比)的函数,并且使用非线性约束优化方法将其最大化。焓的精确值用于非线性优化过程中的热效率计算。利用IAPWS-IF97的工业配方计算热力学循环不同点的焓和熵值。

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