Some months ago I speculated that LENR might one day be used as a heat source to generate light directly using a thermophotovoltaic effect. This work suggests it might be feasible. I even mentioned it to Rossi, on his blog but he just saw it as a means to generate electricty from the light produced.
Harry On Tue, Feb 28, 2012 at 12:45 PM, Mark Iverson-ZeroPoint <zeropo...@charter.net> wrote: > The key wording is here: > > > > "A heated semiconductor light-emitting diode at low forward bias voltage > V<kBT/q is shown to use electrical work > > *to pump heat from the lattice to the photon field.*” > > > > It is converting *heat* energy to light… not electricity-to-light!!! > > > > Thus, as they *lower* the forward bias V, *electrical* efficiency INCREASES > because it is not using electrical current for operation; as Jones said, > it’s the E-field which ALLOWS the HEAT-to-LIGHT conversion. If the material > is not very conductive, one can have a large E-field with miniscule current > flow… thus, very little ELECTRICAL power use. > > > > -Mark > > > > From: Daniel Rocha [mailto:danieldi...@gmail.com] > Sent: Tuesday, February 28, 2012 9:21 AM > To: vortex-l@eskimo.com > Subject: Re: [Vo]:Over unity at MIT > > > > Why do you think it would violate the 2nd law? I don't understand. > > 2012/2/28 Harry Veeder <hveeder...@gmail.com> > > On Tue, Feb 28, 2012 at 11:57 AM, Daniel Rocha <danieldi...@gmail.com> > wrote: >> Pay attention at this: >> >> " Experiments directly confirm for the first time that this behavior >> continues beyond the conventional limit of unity electrical-to-optical >> power >> conversion efficiency." >> >> It is above the conventional, not that it produces energy out of nothing. >> This is just a way of saying that it exceeded expectation of light >> emission >> for a LED. > > Yes. It uses electricity to change heat into light. The abstract: > > "A heated semiconductor light-emitting diode at low forward bias > voltage V<kBT/q is shown to use electrical work to pump heat from the > lattice to the photon field. Here the rates of both radiative and > nonradiative recombination have contributions at linear order in V. As > a result the device’s wall-plug (i.e., power conversion) efficiency is > inversely proportional to its output power and diverges as V > approaches zero. Experiments directly confirm for the first time that > > this behavior continues beyond the conventional limit of unity > electrical-to-optical power conversion efficiency." > > however, wouldn't this require a violation of the second law of > thermodynamics? > > Harry > > > > > > -- > Daniel Rocha - RJ > > danieldi...@gmail.com > >
