燃气-蒸汽联合循环发电系统高级(火用)经济性分析  

Advanced Exergoeconomics Analysis of Gas-Steam Combined Cycle Power Generation System

作　　者：吕嘉伟 霍兆义[1] 刘峰[1] 谢宁 王文静 LÜJiawei;HUO Zhaoyi;LIU Feng;XIE Ning;WANG Wenjing(College of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,Liaoning Province,China)

机构地区：[1]辽宁科技大学材料与冶金学院,辽宁省鞍山市114051

出　　处：《发电技术》2024年第5期941-950,共10页Power Generation Technology

基　　金：辽宁省自然科学基金项目(2021-MS-307)。

摘　　要：【目的】基于(火用)经济发展而来的高级(火用)经济分析方法,能够细化拆分系统组件的经济成本,深入探究经济成本形成的内在原因。【方法】在结合高级(火用)分析的基础上,采用高级(火用)经济分析法将燃气-蒸汽联合循环发电系统中各组件的成本拆解为内源性成本、外源性成本、可避免成本和不可避免成本,并对此进行计算。【结果】在设计工况下,联合循环发电系统中燃烧室的可避免(火用)损最大,为28.41 MW,占燃烧室(火用)损的26.55%。基于计算结果,对透平提出了不同的改进措施,降低了系统内源性和外源性(火用)损。系统中(火用)耗散成本占比最大的是内源性可避免部分,底循环改进优先级最高的是高压缸,其次是低压缸。联合循环发电系统中年度化成本外源性占比为80.59%,其中外源性可避免部分占比40.04%。【结论】研究成果可为系统提供多方面能效评价角度和优化成本的改进方向。[Objectives]The advanced exergoeconomics analysis method based on exergetic analysis development can refine the economic costs of splitting system components and deeply explore the underlying reasons for the formation of economic costs.[Methods]Combining advanced exergetic analysis,advanced exergoeconomics analysis method is used to split the costs of the components in the gas-steam combined cycle power generation system into endogenous,exogenous,avoidable and unavoidable costs,and calculate them.[Results]Under the design conditions,the avoidable loss in the combustion chamber in the combined cycle power system is the largest,which is 28.41 MW,accounting for 26.55%of the combustion chamber loss.Based on the results of the analysis,different improvement measures are proposed for the turbine to reduce the endogenous and exogenous losses of the system.The largest share of the annualized cost of the system is the endogenous avoidable portion,and the bottom-cycle improvement is prioritized highest for the high-pressure cylinder,followed by the low-pressure cylinder.The exogenous share of annualized costs in the combined cycle power system is 80.59%,of which the exogenous avoidable portion is 40.04%.[Conclusions]The findings of the study can provide the system with a multifaceted energy efficiency evaluation perspective and an improvement direction to optimize the cost.

关 键 词：发电系统 燃气-蒸汽联合循环 高级(火用)经济性分析 经济成本 高级(火用)分析 

分 类 号：TK123[动力工程及工程热物理—工程热物理]