I've tried it but i don't think its an engineering system...
Thermal energy flows from a material at a higher temperature to a material at a lower temperature. This general process is called heat transfer. Conduction is the transfer of heat energy by which moving particles make other particles move by the direct contact of particles of matter. Conduction can also occur through the material. A good example of this is a hot cup of tea that is stirred with a metal spoon. As heat flows from the tea to the immersed part of the spoon, that section of the spoon becomes hot. The atoms begin to vibrate rapidly. The immersed atoms are tightly connected to the neighboring atoms along the handle of the spoon. As a result, these atoms also begin vibrating. Their vibrations cause the molecules in your fingertips to vibrate, which creates the feeling of warmth. In metals, free electrons carry the heat energy faster than the atomic vibrations and transfer it by colliding with other electrons and atoms. Because of this, metals are particularly good conductors of heat because their particles are very closely packed so the vibrations are passed on very quickly.
