**5. Conclusions**

The objective of this study was to investigate the performance of an existing 135 MW ISCC power plant in Kureimat. The ISCC power plant was thermodynamically studied under Kureimat climatic conditions. Energy and exergy analyses were performed for the ISCC power plant as a whole at di fferent ambient temperatures (5, 20, and 35 ◦C) and di fferent solar heat inputs (0, 50, 75 MW). Moreover, the exergy destruction and the exergetic e fficiency for the main components of the ISCC power plant were calculated and investigated regarding the influence of the ambient temperature and

#### *Appl. Sci.* **2020**, *10*, 4980

the solar heat input to identify the causes and locations of the highest thermodynamic irreversibility. The integration of solar energy into a natural gas CCPP was analyzed as a power-boosting mode.

The main conclusions of this study are as follows:


**Author Contributions:** A.T. is responsible for the technical, analysis, writing and funding acquisition parts. A.E. has contributed strongly to the design and preparation of the investigation. A.T., A.R., A.E., F.A., and B.E. discussed the formulation and the results and contributed to the review and editing of the manuscript. All authors have read and agreed to the published version of the manuscript.

**Funding:** The authors appreciate the Technical University of Darmstadt for funding the publication costs for the article in an open-access journal. The corresponding author appreciates the Egyptian Government for o ffering the PhD scholarship.

**Conflicts of Interest:** The authors declare no conflict of interest.
