Liquid cooling, cool

I am currently building a laptop cooler. The design I have is ready to be built, and my original design has a patent pending. The one I am building is more just for complete overkill, while looking good as well. The question that comes into play is whether I could implement a liquid cooler into the equation.

What I want to do is have a liquid cooler on the laptop cooler itself. I want to have the radiator for it with the tubing running under the fans. My thought process behind this is that the fans will blow into the bottom of the laptop (as my current design is already doing) With the cooling radiator underneath the fans, the air pulled into the bottom will then become essentially chilled air. Will the radiator be cold or does the liquid running through it basically stay at room temperature? If it stays at room temperature, it would obviously be useless. I just don't have the funds to buy a system, realize it doesn't work and throw it aside for later use. I need to know if it will be cold or not. Thanks!

Cooling temperature doesn't come from no where I'm afraid. If you use water to cool with and the water is 20C (room temp) then that is going to be your "cold sink"

The good thing about your system is liquid is much better at heat transfer than a gas is (like air). In other words if you use 20C liquid to cool a 40C processor it will cool much faster than trying to blow 20C air across the processor fins.

I think of it this way. Take 50 degree F air and blow it across your bare back (open the refrigerator door and let the air blow across you. Now go to the faucet and get 50F cold water and throw it on your back. Even without doing it, you already know the water will feel much much colder, and this is because the liquid absorbs heat directly from your back and cools it to 50F almost immediately, whereas the air takes a long time to get the same effect. Liquid is like 240 times more efficient at conducting heat compared to air.