Well, evaporation is an energy absorbing action, so it DOES have a cooling effect, though whether it will help much depends on how much evaporation is going on. But it will tend to increase your pH. We recommend aeration when one is lowering TA and needs to raise pH without TA rising.

running your filter at night with the pool uncovered should bleed off some heat energy as well. Consider solar panels. If you run them at night it speeds up cooling, like a giant car radiator. Don't run them during the day.