Dear Mamdouh

Your answer was clear and excellent

The exergy analysis is more useful for system optimization, because it's defined for the useful work and energy.

following

Because exergy evaluates the potential places where improvements could made.

Regards

Exergy defines the quality of energy which is stored.

As Mamdouh El Haj Assad has stated, an accurated exergy analysis of a complex system shows the steps of the process where there are more losses and, depending of the costs of improvements, which are the parts of the process that it is more economic to re-design

Because exergy analysis gives the more meaningful evaluation of the system and maximum work is obtained.

Exergy analysis of thermal systems reveals the available work content in all energy streams in your cycle.

Moreover, it reveals the underlying sources of internal exergy destruction and external exergy losses to the surroundings. By having this kind of insight, you get a systematic way to target the processes/components in your system responsible for the largest drops in performance.

I would highly recommend the classic book by Bejan, Thermal Design & Optimization.

Thanks all you

Exergy analysis is an effective tool for the optimization of the system and identfies possible improvements

Exergy analysis helps in finding the following:

• It can be used to determine the type, location and magnitude of energy losses in a system
• It can be used to find means to reduce losses to make the energy system more efficient

At this point, it is worth mentioning that the environment plays an important role in evaluating the exergy (composite property).