why on earth would you want to run a computer hot?? (there are actually very economic and environmental good reasons - we'll see if anyone wants to talk about them!)
OK, I'll bite on this one. I realize spending less on cooling has an immediate economic benefit but deliberately running components hot will shorten their lifespan. If you are lucky the parts will get replaced before wearing out anyway, in which case the difference is moot, but if one of the components was marginal to begin with you might have to replace something at higher expense than an extra radiator. I know yours might be a special case due to the nature of your project but I'm not sure running hot applies to just anyone.
Data centers have shown energy improvements running hot isles or cooling with unchilled water but that's because they reduced hot spots. So while things in general are running hotter, the individual components still aren't overheating.
Also, if the purpose is to capture and use the heat then attempting to store it at high delta T is going to result in increased environmental loss. However, I'm not sure what your material is and it's optimal temperature range so I realize that might limit you. So in your case is it a lack of usefulness at lower temp, sub-optimal phase storage, or limited storage capacity? Just curious how you came to this configuration.
Also, congrats on making print! Any day an enthusiast build makes print is a good day. 🙂
So, how much environmental loss? Is the tank warm to the touch?