1. Eurotech Aurora HPC solutions
Aurora Liquid Cooling

2. Liquid cooling for Eurotech
What is liquid cooling is for us
Liquid cooling for us is:
• Hot.That means: using hot water wherever possible
• Direct. Taken inside the rack in direct contact with the
components
• Green. Able to use free cooling or natural cooling in any climate
zone
• Comprehensive.. Cools any source of heat in the server
(including power supply)
• Serviceable and safe. Allows ease of maintenance and doesn’t
represent a risk for the electronics in the server
Plus liquid cooling for us is:
• Flexible. Offering an engineering solution, a choice of processors,
acting on coolant temperature, flow rate to provide to the
customer the solution and operating conditions that guarantee
maximum performance at the lowest total cost

3. Aurora liquid cooling
High level description
• The main components of the Aurora cooling system are:
• Cooling circuit, that is the pipe work which bring the water to the heat
exchanger and back to the rack
• The heat exchanger for free cooling
• Distribution pipes which are mounted in the rack
• The back plane, which collects the liquid from the distribution pipes and
distributes it to the cold plates
• Cold plates: aluminum boards which are intimately coupled with the electronic
boards of compute nodes, PCUs and switches
• Quick disconnects that are mounted on the cold plates for inflow and outflow
of liquid in the plates. The quick disconnects are fine pieces of engineering that
seal immediately when the boards is extracted from the back plane. No
leakage is possible

4. Aurora hot water cooling
Aurora Rack
Liquid
distribution Backplane
Heat bar
exchanger
Quick
Cold Plate
Cold Plate
Cold Plate
Cold Plate
disconnects

5. Aurora liquid cooling infrastructure
Dry cooler
Filter
Loop #1
Loop #6
Heat
Loop #12
exchanger
Internal cooling Loop
Pump

6. Complete Node Card Aurora
Node card covered by the cooling cold plate, with space for optional SSD. 32 of such
boards (64 CPUs) packed into 6U

7. Dry Coolers example: 400 kW installation
• Redundant (2 fans) Drycooler e.g. ThermoKey
Cooling installation
for 4 racks Aurora Pumps and filter
2x dry-cooler 220 kW

8. Advantages of the Eurotech approach
Hot liquid cooling
• Avoid/limit expensive and power hungry chillers with the only
cooling method that requires almost always dry coolers only
• Minimize PUE and hence maximize energy cost savings
• Reuse thermal energy for heating, air conditioning, electrical
energy or industrial processes
• “Clean” free cooling: no dust, no filters needed to filter
external air
Direct on components liquid cooling via cold plates
• Allow very high densities and very limited heat spillage
• Save in maintenance cost thanks to smooth heat distribution
(no board and data center hot spots)
• A seamless hot swap solution that guarantees serviceability
and ease of maintenance
Eurotech competencies with water cooling
• First in the market to offer an hot swap liquid cooled solution
• Years of experience in dealing with water