1. Wigner Datacenter cooling system upgrade
HEPIX 2017 Spring, Budapest
Gábor Szentiványi
Systems engineer
Wigner Datacenter

2. Agenda Datacenter and cooling system structure Cooling problem
Solution
Future plans
Nem kell részletezni

3. Datacenter and cooling system structure
4 computer rooms
1200 kW heat load, unevenly distributed
2 cooling circuits, 7 chillers each
2 manifolds with 4-4 main pumps
40-42 LCPs per computer room

4. Cooling problem
See previous site reports from Domokos Szabo and Szabolcs Hernath
Coolant flow in manifolds was not designed well
7 chillers teamwork with one built in master
Just control system not regulation
Also separeted mode software problems
Manual control since 2015
Badly planned system
Control system is the past, now we have regulation

5. Solutions Data collecting from the system New regulation system
Regulation by the power consumption
Superior master PLC
New software for chillers
New operation mode
Still manageable on our old EBI system
Not enough sensors, had to extend
Data from all 4 seasons
Speak about the regulation

6. Solutions (cont.) 1 chiller test 3 chiller test (now)
Cooling circuit no 2 test
Upgrade whole cooling system
Valós helyzet elmesélése

8. Future plans With the new operation mode we can optimize our PUE
LCP regulation optimization
Raising the temperature
Safety -> efficiency
LCP flow sensors need upgrade, valves Vs fans
+2 °C temperature -> -5% energy (from Carnot)

9. Thank you!