samedi 3 octobre 2020

Limitless Power From Graphene And Brownian motion

Quote:

Physicists Build Circuit That Generates Clean, Limitless Power From Graphene

The idea of harvesting energy from graphene is controversial because it
refutes physicist Richard Feynman’s well-known assertion that the thermal
motion of atoms, known as Brownian motion, cannot do work. Thibado’s
team found that at room temperature the thermal motion of graphene
does in fact induce an alternating current (AC) in a circuit,
an achievement thought to be impossible.

In the 1950s, physicist Léon Brillouin published a landmark paper refuting
the idea that adding a single diode, a one-way electrical gate, to a circuit
is the solution to harvesting energy from Brownian motion. Knowing this,
Thibado’s group built their circuit with two diodes for converting AC into
a direct current (DC). With the diodes in opposition allowing the current
to flow both ways, they provide separate paths through the circuit,
producing a pulsing DC current that performs work on a load resistor.

Additionally, they discovered that their design increased the amount
of power delivered. “We also found that the on-off, switch-like behavior
of the diodes actually amplifies the power delivered, rather than reducing
it, as previously thought,” said Thibado. “The rate of change in resistance
provided by the diodes adds an extra factor to the power.”

They haven't actually got to step two: harvesting this energy.
I especially like the idea that if no current were flowing the resistor
would cool down.


via International Skeptics Forum https://ift.tt/34ka3al

Aucun commentaire:

Enregistrer un commentaire