[jkqwzsoo]

I think the ultimate answer (for all kinds of waste heat recovery, or "heat economizer" technology) is that waste heat streams simply don't contain enough energy to invest in recovering (otherwise, we'd probably deploy ORCs everywhere).

This device seems more useful for generating mechanical motion at the point of use, rather than generating electrical power. I'm envisioning solar and hydro-powered pumping systems that operate in remote environments, like the third engineer interviewed in the video. He proposed that the engine could be used to pump water solely due to the temperature difference between the pumped fluid and the air.

Another interesting thing would be to run the system in reverse to turn mechanical energy into a hot and cold fluid. I haven't thought it through deeply, but it seems superficially similar to elastic band refrigerators[0,1].

[0] https://www.science.org/doi/10.1126/science.aax6182 [1] https://www.science.org/content/article/fridge-made-rubber-b...