I am curious about heating and cooling, as I have built water cooling systems in PCs, but I am truly inexpert when it comes to industrial cooling. You are the o

I am curious about heating and cooling, as I have built water cooling systems in PCs, but I am truly inexpert when it comes to industrial cooling. You are the one trying to make a point, and presumably know about some interesting problem and solution. If I do a search I will start with no knowledge of Cray and no context to find this answer, even the wikipedia page is too general. If I find common fan and water cooling solutions I might not see why they are better because that information might be too subtle for me as a novice. If you don't provide it is unlikely to be found this discussion; this conversion and you will be intellectually poorer for it. The onus truly is on you to provide interesting information in conversation when you talk.