The performance of two layouts of integrated solar combined cycle (ISCC) are analyzed and compared with reference combined cycle in this study. Detailed models of the proposed cycles were developed in Mathcad environment to evaluate the cycle’s performance. The results show that the power of steam bottoming cycle is increased to about 43 MW that is about 8 % of total power of ISCC represent the solar fraction of the plant in summer period. Less increase is observed of about 12 MW at midday in winter months with soar fraction reaches to 3%. Moreover, an annual evaluation of the ISCC system’s output power is carried out, to assess the annual performance of the cycles.