Abstract A constant CO2 emissions factor in energy mix models is often used when trying to show the CO2 emissions reduction benefit in deploying a large amount of renewable power on the grid. This approach is flawed due to its inability to capture the impact of cycling operations on the emissions characteristics of various coal fired power plants (CFPPs). This can be improved by incorporating a model that predicts the turbine cycle heat rate of different types of CFPPs at various load conditions. Such a generic variable turbine cycle heat rate (V-TCHR) model has been developed in a previous study. This paper discusses the application of the V-TCHR model for determining the CO2 emissions factor of CFPPs at varying load conditions. A demonstration study was carried out to investigate the CO2 emission characteristics at part load of six hypothetical CFPPs having different re-heat architectures. The predicted emissions factors were compared against published benchmark data and found to agree very well. The variable emissions factor model presented is useful to energy modellers as it does not require detail thermodynamic plant models, or gross assumptions, and can be used to model any hypothetical CFPP-based energy system.

中文翻译：

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燃煤电厂循环：预测 CO2 排放的通用 CO2 排放因子模型

摘要 当试图显示在电网上部署大量可再生能源的 CO2 减排效益时，经常使用能源组合模型中的恒定 CO2 排放因子。这种方法存在缺陷，因为它无法捕捉循环运行对各种燃煤电厂 (CFPP) 排放特征的影响。这可以通过结合一个模型来改进，该模型可以预测不同类型 CFPP 在各种负载条件下的涡轮循环热率。这种通用的可变涡轮循环热率 (V-TCHR) 模型已在先前的研究中开发。本文讨论了 V-TCHR 模型在确定不同负载条件下 CFPP 的 CO2 排放因子中的应用。进行了一项示范研究，以研究具有不同再热架构的六个假设 CFPP 在部分负荷下的 CO2 排放特性。将预测的排放因子与公布的基准数据进行比较，发现非常吻合。提供的可变排放因子模型对能源建模者很有用，因为它不需要详细的热力学工厂模型或总假设，并且可用于对任何假设的基于 CFPP 的能源系统进行建模。