Exergic analysis has become an effective method of thermodynamic behavior evaluation for power systems. The current study focuses on an integrated solar–gas combined cycle (ISCC) system for electric power generation and refrigeration. Exergic analysis of the ISCC system is conducted by using the gray-box model as well as the Ebsilon software. The results show that under the rated working condition, the total exergy loss and overall exergy efficiency of the ISCC system are 119.078 MW and 44.63 %. The two largest exergy losses exist in the combustion chamber and solar DSG system, which are 56.45 MW and 28.52 MW, respectively. The LiBr–H₂O absorption chiller system, HRSG, steam turbine and condenser have the same grade exergy losses. When the solar intensity augments, though the solar DSG system has an increase in the exergy efficiency, its exergy loss also increases, leading to the increase in the total exergy loss as well as the decrease in the overall exergy efficiency of the ISCC system. Therefore, further optimizations of the ISCC system should focus on the improvements of the solar DSG system and combustion chamber. The economic and ecological evaluations demonstrate that the ISCC system is economically feasible and ecologically friendly.

用能分析已成为电力系统热力学行为评估的有效方法。当前的研究重点是用于发电和制冷的集成太阳能-燃气联合循环（ISCC）系统。使用灰盒模型和Ebsilon软件对ISCC系统进行了能动分析。结果表明，在额定工况下，ISCC系统的总火用损失和总火用效率分别为119.078兆瓦和44.63％。燃烧室和太阳能DSG系统中最大的两个火用损耗分别为56.45 MW和28.52 MW。LiBr–H ₂O吸收式制冷机系统，HRSG，蒸汽轮机和冷凝器的同级火用损耗。当太阳能强度增加时，尽管太阳能DSG系统的（火用）效率有所提高，但其（火用）损耗也增加了，从而导致ISCC系统的总（火用）损耗增加以及整体（火用）效率下降。因此，ISCC系统的进一步优化应集中在太阳能DSG系统和燃烧室的改进上。经济和生态评估表明，ISCC体系在经济上是可行的，并且在生态上是友好的。