Solar air conditioning
Someone with an engineering background can do the math. But keep in mind that, in general, air conditioning is based on a large temperature difference and a lot of air being forced through. Typical (I think - just a quick search) is ~ 40 degrees for the refrigerant, which would be on the order of 30 degrees difference from the desired temperature. So right away you are at a disadvantage because the difference will be much less. The second problem is the fan speed. A quick search found one window unit with 570 CFM. On that front, you may have a chance - I found computer fans anywhere from 30 - 200 CFM, though most are on the lower end of things. But the biggest problem is that an air conditioner works by expansion/compression to transfer heat. You don't have that here. What you have is simply cool (not "cold") water and trying to cool the air passing over the pipes.

Can't tell for sure without doing the math, but I am very pessimistic.