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首页> 外文期刊>Entropy >Off-Design Modeling of Natural Gas Combined Cycle Power Plants: An Order Reduction by Means of Thermoeconomic Input–Output Analysis
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Off-Design Modeling of Natural Gas Combined Cycle Power Plants: An Order Reduction by Means of Thermoeconomic Input–Output Analysis

机译：天然气联合循环发电厂的设计外建模：借助热经济投入产出分析的降阶

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摘要

In a European context characterized by growing need for operational flexibility across the electricity sector, the combined cycle power plants are increasingly subjected to cyclic operation. These new operation profiles cause an increase of production costs and decrease of revenues, which undermines the competitiveness of the combined cycles. Power plant operators need tools to predict the effect of off-design operation and control mechanisms on the performance of the power plant. Traditional Thermodynamic or Thermoeconomic models may be unpractical for the operators, due to their complexity and the computational effort they require. This study proposes a Thermoeconomic Input–Output Analysis model for the on- and off-design performance prediction of energy systems, and applies it to La Casella Natural Gas Combined Cycle (NGCC) power plant, in Italy. It represents a stand-alone, reduced order model, where the cost structure of the plant products and the Thermoeconomic performance indicators are derived for on- and off-design conditions as functions of the load and of different control mechanisms, independently from the Thermodynamic model. The results of the application show that the Thermoeconomic Input–Output Analysis model is a suitable tool for power plant operators, able to derive the same information coming from traditional Thermoeconomic Analysis with reduced complexity and computational effort.
机译：在欧洲范围内，整个电力部门对运营灵活性的需求不断增长的背景下，联合循环发电厂越来越多地经历循环运行。这些新的运行方式导致生产成本增加和收入减少，从而削弱了联合循环的竞争力。电厂运营商需要工具来预测非设计运行和控制机制对电厂性能的影响。由于操作员的复杂性和所需的计算量，传统的热力学或热经济模型对于操作员可能不切实际。这项研究为能源系统的设计时和设计时性能预测提供了一个热经济投入-产出分析模型，并将其应用于意大利的La Casella天然气联合循环（NGCC）发电厂。它代表一个独立的，减少订单的模型，其中工厂产品的成本结构和热经济绩效指标是根据设计负荷和不同控制机制的功能，针对设计和非设计条件得出的，而与热力学模型无关。该应用程序的结果表明，热经济投入-产出分析模型是发电厂运营商的合适工具，能够以较低的复杂性和计算量从传统的热经济分析中获得相同的信息。

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