Energy harvest inside server

[Li Yisuo]

After reading through the wonderful article regarding power analysis, https://www.semiwiki.com/forum/content/3805-power-thermal-analysis-data-center-server-ics.html, I feel Docea power is really doing a great job.
Nevertheless I just wonder why we don't have some energy harvest devices inside the server. Thomas Johann Seebeck found the thermoelectric effect in 1821, Thomas Johann Seebeck - Wikipedia, the free encyclopedia.
V=alpha * (Ta-Tb), the Seebeck effect is generally used in thermocouples.
Just imagine we skim the energy from data center with a silver spoon, the world may get greener.

 

[farshad57]

I think the amount of power we can harvest is not comparable (negligible) to the power a server consumes...

 

[Marc Murphy]

Energy harvesting skims a tiny bit of energy so it's ideally suited to an application where:
1) there is a lot of energy available to be harvested
2) the application requires a very small fraction of the energy available

Servers are not very good because they need a lot of energy and you could never harvest enough to make a difference.

A good example of energy harvesting is a self-winding watch... lots of kinetic energy available and the watch only has to harvest a tiny amount to operate.