I think destilled water is only relevant for watercooling, because the effort to keep it dielectic is too high, right?

Regarding the PSU the 92% Efficiency of Alphaminer PSU tells me that heat development of PSU (8%) is much less then heat development of Hashboards (92%). Is watercooling meaningful for PSU, due to "centralized" heat sources (like asics at the hashboards) or is it unsuitable?

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Regarding coolant of immersion cooling i guess safety effort is a tradoff for other requierements. Obviously non flammable coolant is desirable, but i am not sure if one should take it absolute. For example pressurized Propan and Butan are coolants for heat pumps, low climate impact, low price, dielectric and good thermal characteristics, but flamable. I guess no one ever tried that as a coolant for mining hardware (i will neither), but i would not rule out that, because with highter safety effort the risk seems to be manageable.      

I think destilled water is only relevant for watercooling, because the effort to keep it dielectic is too high, right?

Regarding the PSU the 92% Efficiency of Alphaminer PSU tells me that heat development of PSU (8%) is much less then heat development of Hashboards (92%). Is watercooling meaningful for PSU, due to "centralized" heat sources (like asics at the hashboards) or is it unsuitable?

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Regarding coolant of immersion cooling i guess safety effort is a tradoff for other requierements. Obviously non flammable coolant is desirable, but i am not sure if one should take it absolute. For example Propan and Butan are coolants for heat pumps, low climate impact, low price, dielectric and good thermal characteristics, but flamable. I guess no one ever tried that as a coolant for mining hardware (i will neither), but i would not rule out that, because with highter safety effort the risk seems to be manageable.