**5. Conclusion**

In this paper, solar energy usage by means of photon enhanced thermionic emitter is analyzed via extended exergy analysis, which is one of the methods for evaluating sustainability, and dynamic performance analysis is conducted. Izmir, which is the third biggest city in Turkey and has great monetary flow, is chosen as considered location. Since, it has good solar potential. Some important results and recommendations are listed as follows:


• The maximum values of the indices show that it has good potential where global irradiation is high and generally, its losses are greater for the times when the solar irradiation is lower.

Finally, it is recommended that extended exergy analysis should be applied to other systems, which are energy conversion systems, because of its advantages in sustainability aspects mentioned before.
