It seems to me that the energy output of a LENR reaction can take on many forms simultaneously. The production of heat could be just one weak contributor to the energy output product.
Some of these forms may be carried as pressure increase like in Papp, RF radiation, Magnetic radiation, electric current, production of high frequency EMF like XUV to visible light, kinetic energy like in a shock wave, endothermic nuclear reactions like in Mizuno. If Mills only depends on the capture of just one of these forms of energy like he seems to be doing, for example only the capture of light, then he will be at a distinct disadvantage in the competitive COP competition between LENR reactor designs. Some types of energy are inherently inefficient such as low quality heat as its thermodynamics will make power conversion grossly inefficient. The reactor designer that can capture the most energy from multiple energy output sources will have a leg up in the forthcoming over unity reactor race.
