They go crazy because a lot of the heat is dispatched through the keyboard. So if you cover that up (i.e. close the screen) the heat will remain in the system and get pushed out the exhaust (under the screen). For it to get pushed out, the fans have to turn up to a higher RPM to get the air circulating.Everytime I close my MacBook Pro, the fans start going crazy. Is there a way to keep them quiet?
That looks like a cool little device, but I'm not so sure I agree with the way it's configured in the picture. Pointing the fan exhaust down seems contrary to efficient cooling. But I don't know how much this would actually affect things in the real world.