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本文采用热经济学结构理论方法,以太阳能辅助600 MW燃煤发电系统为研究案例。构建了该系统的物理结构图、生产结构图,可以准确描述出系统各个设备之间的生产关系。使用所建立的燃料产品热经济学模型量化了各个设备的消耗、消耗的组成以及相互间消耗的交互关系。通过系统仿真,深入分析了太阳能辅助发电系统热力性能与原普通燃煤机组的差别。对太阳能辅助发电系统在变工况下系统性能及系统组成部分性能特性进行了详细研究。结果表明热经济学结构理论弥补了传统热力学分析方法(如未能考虑系统各个设备不可逆损失的不等价性等)不足,能够简单明确表示出每个组元对外部资源的消耗情况,并可以量化太阳能资源与燃煤资源对系统的影响。
In this paper, thermal economics structure theory method, solar energy-assisted 600 MW coal-fired power generation system as a case study. The physical structure diagram and production structure diagram of the system are constructed, which can accurately describe the production relations between the various equipments in the system. Using the established thermal economics model of the fuel product, the consumption of each device, the composition of consumption, and the interactions consumed with each other are quantified. Through the system simulation, the differences between the thermal performance of the solar assisted power generation system and the original ordinary coal-fired units are deeply analyzed. The performance of the solar assisted power generation system under varying operating conditions and the performance characteristics of the system components are studied in detail. The results show that the thermoeconomic structure theory makes up for the deficiency of the traditional thermodynamic analysis methods (such as the failure to consider the inequality of the irreversible losses of various equipments in the system), can simply and clearly show the consumption of external resources by each component element, and The impact of solar energy, resources and coal-fired resources on the system can be quantified.