Questionable.
Turbines generally extract energy from the fluid passing through them, cooling it.
Actually, if I think about it, it does make sense. Cold air come out of an air conditioner if you are in front of it, but when you are outside you feel hot air coming out. At least that is how I see it
Definitely true for compressible fluids like air, that's why they install air dryers on compressed air lines feeding tools like impact wrenches lest they literally freeze up.
Not so sure that it works for incompressible fluids like water (the tailraces below the turbines at Boulder dam would fill with ice bergs!). I think the power extracted shows up as reduced kinetic energy (static and dynamic head are reduced in proportion to the extracted power).
Regards,
GtG
A "cooling fan", as used on many types of equipment, adds energy to the fluid flowing through it, warming it, but nonetheless helps to cool equipment by increasing the effectiveness of heat transfer across a thermal gradient.
The atmosphere of the planet loses a lot of heat to space. How effectively heat gets carried from the surface of the planet and out into space varies depending upon many factors. Conceptually, things which reduce the intermixing of different-temperature volumes of air would, all else being equal, likely reduce the effectiveness of the heat transfer. Of course, there are so many interacting feedback mechanisms that it would be impossible to honestly identify the exact balance of effects caused by any particular action.