The Client

DONG Energy was established in 2006 by the merger of six Danish energy companies: DONG, Elsam, Energi E2, Nesa, Københavns Energi and Frederiksberg Forsyning.
It was created as a vehicle to develop Danish energy activities. The company has expanded significantly through organic growth and acquisitions both in Denmark and across Europe.
The merger brought together a wide range of experience, resources and activities, including oil and natural gas exploration and production, electricity generation at power stations and renewable energy facilities and natural gas and electricity distribution.

The brief

In 2009 Dong Energy required an energy efficient cutting edge design for the cooling of their state of the art new build data centre in Denmark.


The site had to retain a small footprint whilst maximising the density – for this they requested 15kW – 30kW capacity for each cabinet with a water supply temperature of 15°C. They required a Tier 3 N+1 and opted for chillers and dry air cooler in their external space.


USystems installed 23 42U cabinets with CL20 C8 rear coolers within the white space of the data centre build enabling them the packaging densities required with capacity to increase heat loads in the future within the same footprint.

Kilowatt duty

The total for this 23 cabinet data centre is 350kW

Energy savings

The ColdLogik solution offered a 90% saving on the CRAC based design Dong had previously been quoted for.

Room density

23 racks – 23 ColdLogik rear coolers 15-30kW per rack

External plant

2 x chiller and 1 x dry air cooler.


Dong Energy have subsequently replaced an existing CRAC based system with ColdLogik CL20 and are planning further upgrades.

Dong DC2 install
DONG DC 2 SAN Intro 0 00 31 46
Dong Top Boxes
Dong Valves
Dong Pipe Work

Client Comments

Since having the system installed we have now replaced other CRAC based systems with ColdLogik and are planning further expansion of our datacentre utilising ColdLogik.

Contact us