I'm inclined to be doubtful of this. There was very little information in Adam Grosser's talk, and the first thing I noticed was the slide that claimed this thing required no consumables, followed almost immediately by Grosser giving the lie to that, saying it needed a fire. The second thing that struck me was that he specifically said the ammonia refrigeration tables were wrong. They may be, for all I know about it, but ammonia's pretty nasty stuff and was replaced a long time ago in refrigeration applications. It'd have to be a pretty ancient refrigerator to have ammonia as the working fluid, so that doesn't really seem relevant. Absorptive refrigeration does work, and that's what he's talking about in principle, RVs and motor homes often have a propane or LPG-powered unit on board, but generally it's on a much larger scale than that, like using waste heat from a turbine to air condition a building.
And pay close attention to exactly what he said. They've done the calculations and built a prototype that demonstrates intermittent absorptive refrigeration works, but there were no details provided about that prototype machine, how big it was, how efficient it was, what the energy source was, what the working fluid was, nothing. The very first thing he said was that it's a work in process, and almost the last thing he said, as he held up that little gizmo, was that it's the fifth prototype and they're not quite done. In other words, it's not working yet.
