When you think about our brains, this makes a lot of sense and one of those things that seem obvious in hindsight. Our brains are efficient and have high computing power, but why don't they heat up? Because liquid (blood) is constantly flowing through it to keep it cool. But unlike traditional liquid cooled computers, blood also powers our brain. What I'd like to know, which I don't think they mentioned in the articl…
Our brains also use far less energy than almost any computer but your cell phone. 2500 kilocalories / day = 120 Watts. Your brain is something like a quarter of that, so about 30 Watts for your brain.
This is true, but without the blood to carry excess heat away your brain would still heat up to the point where its cells would no longer be able to function and you would die (only need in increase of about ~3C).