I know, I saw that. The article is lovely, and I love the design (dithered images like that hits all the right nostalgia notes), but it's lacking in a meaningfu

I know, I saw that. The article is lovely, and I love the design (dithered images like that hits all the right nostalgia notes), but it's lacking in a meaningful technical analysis. Directly driving the heat pump has the potential to be more efficient still, but it's 1) very hard to design and 2) a custom (and therefore quite expensive) design. Hooking your turbine to a generator, which can probably do something like 80% efficient transformation of the mechanical energy to electric energy (incorporating losses). Wire that generator to an electric heat pump. 240-320% > 100% You can lose another half of your electrical energy in transport and storage and still come out ahead. Thermodynamics is weird.