Some laptop manufacturers are engaged in the manufacture of a Leather Laptop Case and passive notebook cooler, that is to say, it does not have fans or moving parts. Although they are uncommon, there are two types.
The aluminum shelf looks like a bar of active cooling, but the interior is empty. Fins of the heat pipes provide dissipation. This is a generally thin and flexible tablet in appearance. The interior contains a conductive (sodium sulfate decahydrate Na2SO4.10H2O1) phase change which is solid when cold and is liquid under heat, thus creating the heat pipe principle.
These devices are effective, but to a lesser extent, if the temperature reaches just over 5 degrees, they become ineffective with prolonged computer use. Advantage include no noise and ease of travel related to the smaller size. The gains are relatively low for a PC that will heat up a lot, and the system becomes ineffective with prolonged computer use.
