Heat Pipe is a thermal energy absorbing and transferring tool which can transfer heat at the sonic speed to the other end and hence it is also known as the the super conductor of heat transfer.
The heat pipe can carry about one thousand times more heat energy than all equivalent size of Copper rod for the same temperature gradient. In other words it has an effective thermal conductivity several hundred times more than an equivalent size of copper.
The pipe is evacuated to the tune of 10¯4 torr and is filled with small qty of liquid ( water, ethanol, methanol etc).
When installed vertically the lower portion is called as the evaporator section and the upper portion is called as the condenser section.
When the condenser section comes in contact with the hot fluid or the hot air, the liquid inside vaporizes at very low temp because of the vacuum and the vapors go to the condenser section and transfer heat to the outside of the pipe and from there is the heat is picked up by the air or liquid and is given to the process.
