Bengi, I can’t answer your questions rgdg mixing the activated & non-activated fluids. As it is individual molecules that are charged with energy from sunlight, energy they retain until said energy is expressed as increased temps when the fluid is passed through a catalyst filter. The molecule can then be returned to the solar collector to be recharged, over and over. They say the catalyst is showing to be durable, suffering only minor degradation that would eventually require replacement or some kind of recharging. one big breakthrough is the more recent version of the fluid was able to eliminate flammable toluene as the medium the molecules were carried in. That combined with the durable heat retaining molecule & catalyst is why I suspect the scientists are so enthusiastic about possible commercial application as soon as 10 years. They say there are 15 teams working on this technology around the world, so I would think we will see more good news soon. Apparently the molecule takes only a small amount of the wavelength of sunlight into it as energy, primarily the blue and UV parts of the spectrum, so obvious expanding that would be a priority.
I foresee a vast array of applications if the application proves out and improves. The ability to turn sunlight into steam using solar collectors could drive turbines to create electricity at the same time it’s heating your floors. Excess heat could warm greenhouses during winter months. The fluid, once charged could be transported safely and could possibly drive steam engine vehicles if the energy/weight ratio improves enough. They say there isn’t anything about the manufacturing processes they see in creating these planned systems that is environmentally destructive. Honestly, if a 300 gallon tank in the back yard and solar collectors on the roof is part of the price I pay for reliable heat all winter and for many winters to come while eliminating fossil fuel use...here, take my money!