I'm surprised to see that this project uses wet cooling. Wikipedia claims it uses at least twice as much water as a coal power plant of similar capacity.
Is water surprisingly abundant in this part of the Sahara?
By definition this is low grade heat. In cold climates that can be used for stuff like heating nearby homes. In hot climates you're basically limited to running it through a bottoming cycle [1].
But that needs a delta T between the hot water coming out of your cooling system and ambient temperature of probably about 40 K, which probably requires a bigger cooling system than otherwise. So you have the added investment cost of a bigger cooling system plus the bottoming cycle, but you've gained some more energy output. Is it worth it? Impossible to say without crunching the specific numbers. But my first guess is "no" in this case. It is usually worth it for gas fired powerplants though.
Is water surprisingly abundant in this part of the Sahara?