As a Data Center Technician in the Pacific Northwest, I'm shocked that antiquated facilities like this are still being built. They will never reach the power density or PUE/DCiE threshold they are aiming for. Aside from the Liebert DS CRAC units along the walls, this data hall looks like it was built at least 10 years ago. Raised floor/dropped ceiling layouts with perforated tiles always result in poor hot aisle/cold aisle isolation, and the Liebert DS units (with their single-speed centrifugal blowers) run at hog-wild inefficient fan speeds and overcompensate for bypass air with 150+ CFM/kW!
For the record, modern energy star certified servers in eco-mode run at less than 80 CFM/kW with some equipment in the ~50 CFM/kW range. This leads to a deltaT of 39.5DegF @ 80CFM/kW or 57.5DegF @ 55 CFM/kW! A supply air temperature of 72DegF in the data hall could have exhaust temperatures at the rear of the server of nearly 130 degrees. The answer is not to
DILUTE this exhaust air with excessive bypass and wasted fan energy, but to duct the hot server air directly back to the cooling unit with a variable-speed fan programmed to maintain a steady slight negative pressure in the ducting system. Data centers like these are the cancer that permeates modern high-performance computing.
/Mozilla I am disappoint/