A global optimization method synthesizing heat transfer and thermodynamics for the power generation system with Brayton cycle

7th European Thermal-Sciences Conference

Fu, Rong-Huan^1 ; Zhang, Xing^1

Key Laboratory for Thermal Science and Power Engineering, Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Beijing

100084, China^1

关键词: Global optimization method;    Heat transfer theory;    Minimum energy consumption;    Power generation systems;    Supercritical carbon dioxides;    Thermo dynamic analysis;    Thermodynamic cycle;    Thermodynamics analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/745/3/032005/pdf
DOI  :  10.1088/1742-6596/745/3/032005

来源: IOP

【 摘 要 】

Supercritical carbon dioxide operated in a Brayton cycle offers a numerous of potential advantages for a power generation system, and a lot of thermodynamics analyses have been conducted to increase its efficiency. Because there are a lot of heat-absorbing and heat-lossing subprocesses in a practical thermodynamic cycle and they are implemented by heat exchangers, it will increase the gross efficiency of the whole power generation system to optimize the system combining thermodynamics and heat transfer theory. This paper analyzes the influence of the performance of heat exchangers on the actual efficiency of an ideal Brayton cycle with a simple configuration, and proposes a new method to optimize the power generation system, which aims at the minimum energy consumption. Although the method is operated only for the ideal working fluid in this paper, its merits compared to that only with thermodynamic analysis are fully shown.