中文摘要：

在这份报纸， exergy 分析方法被开发估计一个 Rankine 周期系统，由把 supercritical CO2 用作工作液体并且以太阳能为动力。建议系统由撤离太阳的收集者组成，扼杀阀门，高温度的热 exchanger，低温度加热 exchanger，并且喂泵。系统被设计为利用撤离太阳的收集者把太阳能变换成机械精力和因此电。以便调查并且估计这个系统的 exergy 性能，精力，熵， exergy 平衡为部件被开发。exergy 破坏和系统部件的 exergy 效率值也是坚定的。结果显示那个太阳的收集者和高温度加热让低 exergy 效率贡献最大的份额到系统不能反逆的性能并且应该是优化设计焦点改进系统 exergy 有效性的 exchanger。进一步， exergy 分析是一个有用工具在这方面当它允许要评定的每个过程和损失的表演被确定。Exergy 分析结果能在设计，优化，和改进努力被使用。

英文摘要：

In this paper,exergy analysis method is developed to assess a Rankine cycle system,by using supercritical CO2 as working fluid and powered by solar energy.The proposed system consists of evacuated solar collectors,throttling valve,high-temperature heat exchanger,low-temperature heat exchanger,and feed pump.The system is designed for utilize evacuated solar collectors to convert solar energy into mechanical energy and hence electricity.In order to investigate and estimate exergy performance of this system,the energy,entropy,exergy balances are developed for the components.The exergy destructions and exergy efficiency values of the system components are also determined.The results indicate that solar collector and high temperature heat exchanger which have low exergy efficiencies contribute the largest share to system irreversibility and should be the optimization design focus to improve system exergy effectiveness.Further,exergy analysis is a useful tool in this regard as it permits the performance of each process to be assessed and losses to be quantified.Exergy analysis results can be used in design,optimization,and improvement efforts.