中文摘要：

建立太阳能Braysson热机系统的一般模型,探讨集热器的辐射热损、太阳辐照强度、工质变比热容、有限速率热传导、工质与热源间的传热系数比等对系统性能的影响,应用数值计算和图解方法,对热机系统的功率、效率、集热器的最佳工作温度等性能参量进行分析和优化,同时也详细讨论了一些重要性能界限,所得结论不仅能导出相关论文的主要结果,且可为太阳能热机的性能参数设计提供参考.

英文摘要：

A solar-driven Braysson heat engine system was established and the effects of the radiation heat loss of the solar collector, the solar radiation intensity, the temperature-dependent heat capacity of the working fluid, the finite rate heat transfer and the ratio of heat-transfer coefficients on the performance characteristic of the system were investigated. By using numerical value calculation, the power output and overall efficiency of the system, the operating temperature of the solar collector, and so on were analyzed and optimized. At the same time, some important performance bounds of the system were discussed in detail. The related results in literature can be deduced from the conclusions in the present paper. The resuhs obtained may provide some theoretical guidance for the parameter design of solar-driven heat engines.