It’s evaluating the heating properties of propane and showing the results of an ai model they put to work to evaluate the efficacy of propane in heat pumps. The outcome was that oil tends clogs in propane heated oil based heat pumps that lack an oil separation unit and that work needs to be done to prevent that from happening in systems where refrigerants and oil are mixed/used in the same system.

The main reason i posted it was because it’s hard to find anything defending propane as efficient and a next generation refrigerant. I also wanted to just point out the GWP of propane which is like 3. Though I just googles that and it says the updated data based on European data, it’s 0.02 over 100 years which is next to nothing compared to natural gas and wood burning.