I've done some renovations on similar products and that stuff often goes to recycling centers and if they can't do that, the guys usually buy it from the company for scrap metal prices. The interesting thing about a lot of this equipment is that once it is used it cannot be insured. When working on these facilities insurance is the big problem, even moving them requires insurance and a line of paperwork. so it is often cheaper and easier for some guy to throw it on it trailer and the liability ends the moment it is on the other persons trailer.
There are guys I work with who run refurbishing businesses and they can give them a certificate saying "this has a 3 year warranty on it" and then smaller businesses can take that to their insurance and install stuff there. I see this most often with large back up diesel or natural gas generators but it also happens with some of the larger HVAC equipment. Lots of these cooling things go on to returaunts and the generators often goto automotive work shops or CNC shops.
It's also not uncommon for people to dismantle them and sell them as "used good" parts.
The most disappointing thing about them is that there is usually absolutely nothing wrong with any of the equipment other than the insurance company says no.
No, I haven't seen any of these large scale datacenters dump their equipment yet, but there are people who are worried about it because these are big units and the datacenters use LOTS of them. Lots of generators and lots of cooling towers. Most places usually only have 1 or 2 units and datacenters can have 30 or 40 of each one. The large scale transformers will get bought up electric companies and I really don't know what they do with them after that. I've heard that they either goto small towns that need an upgrade or get used as cheap alternatives for shopping centers and strip malls, but they're also typically property of the local electric company and we're legally not allowed to touch them.
We refer to them as "on the road" but they can be under or in the building, but we have a saying. Everything from the road to the meter is owned by the electric company and everything "from the meter" is our responsibility. I don't have any insight on how some of these new buildings we entire separate grids work. I've been doing this stuff since 2004 and this is completely new territory. I would usually hear from other crew leads what's going on but there are so many NDAs on these jobs that I'm not joking when we often aren't even allowed to talk to each other and have fences around designated work areas. If you need something outside your work area you have to radio to someone and they'll go grab you what you need.