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Why is a personal computer hot?  
The backseat player “Heat release technology”

Interesting “Technology world”

3F

You may happen to burn yourself if you let it be...

Actually, everything powered by electricity “becomes hot”

In today's world, at least you have to be able to make full use of computers. You research something on the internet, write a paper touching keys lightly, and you might call yourself a “hotdogger”. You might finish it for the meantime and try to save data in a CD... Oh? Hasn't this PC become hot?

Everyone may have such an experience. Also, your mobile phone's recharger may be hot, or you may say “It's too hot” when you touch a light bulb to exchange it without caution...

Yes, electronic products you are usually using without much attention release “heat” when you are using them. This is caused by the frictional resistance when electricity runs through. A familiar phenomenon “Things become hot when rubbed” is happening in the invisible world of electron. Electric heaters and toasters make use of this principle. Electricity runs through high resistance and easy-to-heat metal which is selected on purpose so it releases heat.

The more multi-functional it becomes, the more heat it releases. It's a hassle, but reality.

A CPU releases most heat in a personal computer and recent high-speed and large capacity models tend to release a lot of heat. Especially, as notebook computers have various functions in their small bodies, they can easily be heated up. The state of an IC which is filled with elements such as semiconductors is just like inside a crowded train and it's hot even in winter. If you keep using it without taking any countermeasures, the CPU becomes such hot that you can even cook a soft-boiled egg on it. At worst, the CPU is damaged by this heat and you might have to say “Oh, shoot! I lost all the data!” If it happens, your homework you took the trouble to, the Web which you collected your “favorites” and e-mails will be lost. And what is more, what would you do if your DVDs and TV tuner break? For this reason, heat release which cools down PC is important.

Not look before you leap, but “cool down before it breaks.” This is the heat sink.

Of course, to prevent it from happening, there is a structure which releases CPU's heat. That is the system called “heat sink.” There are various types from for large sizes to for mobile phones, but this time, we'll tell you about “heat pipe type heat sink” which is used for notebook computers. A heat pipe literally means something that liquid (purified water) is filled in “a pipe”. One end of the pipe is close to the CPU and the liquid vaporizes by absorbing CPU's heat, and then it is carried to the other end which touches the outer surface of the body and absorbs heat, after that, it returns to liquid. This cycle - when the heat is disposed of, it returns to around the CPU - is repeated. This acting is called “latent heat transit”. “Water sprinkling” which was performed in Tokyo for the past few years in an effort to blow over the heat-island phenomenon has the same effect.

[Heat pipe]liquid carries heat efficiently.

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3F Interesting “Technology world”
  • 01 Heat release technology
  • 02 superconductivity cable
  • 03 Next-Generation Automobiles
  • 04 Smart Grid
  • 05 High-Capacity Optical Communication
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