Reference Designs

Explore various customer deployment scenarios designed for our Stockholm 4 South site, with its flexible design and preparation for high density and liquid cooling. Here, you’ll find three distinct examples, each highlighting a different approach to effective cooling:

  • Air Cooling: Explore a design that leverages traditional air cooling methods, emphasizing energy efficiency and simplicity.
  • Direct-to-Chip Liquid Cooling: Delve into a scenario featuring direct-to-chip liquid cooling, offering high-performance thermal management for demanding applications.
  • Immersion Cooling System: Innovative design for unparalleled heat dissipation and energy savings.

Each example provides detailed insights and practical layouts to help you envision the best cooling strategy for your needs.

Example 1 – Air cooling 1.5 MW

Cooling Capacity: 1.5 MW air cooling
Rack Design: 40 kW per rack
Total Deployment:
– Four pods with 10 racks each
– Total of 40 racks
Power Supply Requirements:
– Each rack requires two 63A 3-phase PDUs
– Two 400A busbars above each row of racks

Below is an image illustrating how this deployment could look like in this scenario.

Example 2 – Direct-to-Chip Liquid Cooling 3.6 MW

Cooling Capacity: Maximized power with direct-to-chip liquid cooling, totaling 3.6 MW
Rack Design: 64 kW per rack
Total Deployment:
– 3.6 MW net server load (NSD)
– Approximately 56 racks
Power Consumption:
– 2.8 MW using liquid cooling
– 840 kW using air cooling, equivalent to 15 kW per rack
Power Supply Requirements:
– Each liquid-cooled rack requires two sets of two 63A 3-phase PDUs
– Four 630A busbars above each row of racks

Below is an image illustrating how this deployment could look like in this scenario.

Example 3 – Immersion Cooling System 1 MW

Cooling Capacity: 1 MW total NSL distributed across multiple immersion cooling systems
System Design:
– Each immersion system consumes 0.5 MW (4 tanks per system)
– 1 MW total requires 2 immersion systems
– Equivalent to 2.4 kW/U with fully equipped tanks having 52U each
Power Consumption:
– Air system: 5-10 kW
– Remaining hall space can be used for air cooled systems
Power Supply Requirements:
– Each immersion-cooled tank requires two sets of three 63A 3-phase PDUs
– Four 400A busbars above each immersion system

Below is an image illustrating how this deployment could look like in this scenario.

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