S-CO2布雷顿循环转化效率分析

以超临界二氧化碳简单回热型布雷顿循环为研究对象，以核电站为应用背景，详细论述了系统循环模型与关键器部件的效率模型建立方法，并利用该模型初步分析了各类工程因素对布雷顿循环效率、系统体积的影响，分析结果表明，循环效率、系统体积对温度、压力、涡轮机械效率、回热器等参数的敏感性存在较大差异，其中增加透平入口温度对缩减系统总体积最为有效，需要建立完善的系统分析模型以进行S-CO₂系统的优化设计。

A supercritical carbon dioxide cycle efficiency analysis

The supercritical carbon dioxide (S-CO₂) Brayton cycle is a new type of power generation technology with broad application prospects. This paper takes the supercritical carbon dioxide simple Brayton cycle with recuperation as the research object, and takes the nuclear power plant as the application background. The system cycle model and the efficiency model of the key components is discussed in detail. Based on this model, the influence of various engineering factors on the efficiency of the Brayton cycle and the volume of the system has been discussed. The analysis results show that the sensitivity of cycle efficiency and system volume to parameters such as temperature, pressure, turbomachinery efficiency and regenerator design differs obviously, and the most effective method to reduce the system volume is increasing the turbine inlet temperature. It is necessary to establish a complete system analysis model to optimize the design of the S-CO₂ system.