People may be first to heard about this word, actually most of the peoples in this world already use it for several decades. The typical example is the icebox.
Icebox often using a lot of heat pipes to radiate the heats , also like the PC and air condition they are use the same important component—heat pipe

The principle behind heat pipe's operation is actually very simple. It divided into two parts, one is the condenser one is the body, Peak Solar heat pipe use TU1 copper it acts like a high conductance thermal conductor. Due to its thermal-physical properties, its heat transfer rate is thousand's times greater than that of the best solid heat conductor of the same dimensions. The basic heat pipe is a closed container with a small amount of vaporizable fluid.

A heat pipe employs an evaporating-condensing cycle, which accepts heat from an external source, uses this heat to evaporate the liquid (latent heat) and then releases latent heat by condenser at the header pipe of manifold. This process is repeated continuously by a return feed mechanism of the condensed fluid back to the heat zone.