Abstract

This paper presents a thermodynamic and economic modeling of Rankine cycles (RCs) that use waste exhaust energy of a gas turbine in the power plant of Sirri Island in Iran based on energy, exergy and economic concepts. In addition, the exergoeconomic and advanced exergy analyses were performed. This cycle is composed of a supercritical CO₂ Rankine and a transcritical CO₂ cycle. Two objective functions, including the most rate of net power generation of the Rankine cycle (as a thermodynamic criterion) and the lowest total purchased equipment cost (as an economic criterion), are considered simultaneously. This model is constructed on the basis of the energy, exergy and economic analysis according to the Total Revenue Requirement (TRR) method. After validating the model, the advanced exergy analysis is performed to split exergy destruction rate into endogenous, exogenous, avoidable and unavoidable parts in order to provide detailed information about the potential improvement of the system components. The final results indicate that the net electric power output of the Rankine cycle and the total purchased equipment cost become 2.31 (MW) and 301473 (US$), respectively. Also, the exergy efficiency and the total exergy destruction of the cycle reach 48.4% and 8757.4 (KW), respectively.

中文翻译：

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燃气轮机双级Co 2功率循环的优化及超前热力学分析

摘要

本文基于能量，火用和经济概念，提出了兰金循环（RC）的热力学和经济模型，该循环利用伊朗西里岛发电厂的燃气轮机的废排气能。此外，进行了能效经济分析和高级能值分析。这个周期是由超临界的CO ₂朗肯和跨临界CO ₂周期。同时考虑了两个目标函数，包括朗肯循环的净发电率最高（作为热力学标准）和最低购置设备总成本（作为经济标准）。该模型是根据总收入需求（TRR）方法在能源，火用和经济分析的基础上构建的。验证模型后，将进行高级火用分析，以将火用破坏率分为内源性，外源性，可避免的和不可避免的部分，以提供有关系统组件潜在改进的详细信息。最终结果表明，朗肯循环的净电力输出和购买的设备总成本分别为2.31（MW）和301473（US $）。也，