j0shua on Nostr: I get that the problem lies in transferring the heat from the asic to the fridge ...

I get that the problem lies in transferring the heat from the asic to the fridge generator. For discussion sake, couldn't you use an S9 Hydro (or any other Hydro model) and route the hot water from the S9 to a heat exchanger on the generator of the fridge. According to Wikipedia the fridges operate around 14-16 bar, which puts the vapor point for ammonia around 97-106°F, according the P/T chart. If I'm not mistaken, it would simply be a matter of adjusting the flow rate of the S9 water circulator to ensure it was heated to at least few degrees above that point.