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Thermoeconomic optimisation of heat recovery steam generators of combined cycle gas turbine power plants considering off-design operation

机译:考虑非设计运行的联合循环燃气轮机电厂热回收蒸汽发生器的热经济优化

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摘要

One of the practical uses of the thermoeconomic models is to find a trade-off between efficiency and cost in the design of a power plant. Usually, the thermoeconomic analyses involve a thermodynamic model of the power plant and an economic model dedicated to assess the costs. In combined cycle gas turbine (CCGT) power plants, the thermodynamic model usually calculates the performance and the energy balances of the power plant at the design conditions. However, nowadays, after several years of CCGTs operation experience, data of annual operation may be found, which differ to some extent from the design conditions. This paper shows a methodology to achieve thermoeconomic optimisations of CCGT power plants taking into account the frequent off-design operation of the plant. Therefore, the aim of the work is to improve the thermoeconomic design of the power plant by means of considering a more realistic annual operation scenario. In addition, the methodology is applied to optimise several CCGT configurations operating under different scenarios of energy production. The results of the optimisations are compared to those obtained with usual thermoeconomic models based on design conditions performance.
机译:热经济模型的实际用途之一是在电厂设计中找到效率和成本之间的权衡。通常,热经济学分析涉及电厂的热力学模型和专用于评估成本的经济模型。在联合循环燃气轮机(CCGT)电厂中,热力学模型通常在设计条件下计算电厂的性能和能量平衡。但是,如今,经过CCGTs几年的运行经验,可能会发现年度运行数据,这些数据与设计条件有所不同。本文介绍了一种方法,该方法考虑了电厂经常进行的非设计运营,从而实现了CCGT电厂的热经济优化。因此,工作的目的是通过考虑更现实的年度运行方案来改进电厂的热经济设计。此外,该方法还用于优化在不同能源生产情景下运行的几种CCGT配置。根据设计条件性能,将优化结果与使用常规热经济模型获得的结果进行比较。

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