Cooling and heat reuse for data centers

A data hall turns electricity into heat around the clock. The cooling plant has to remove it without stopping, and more and more operators are asked what they do with the heat afterwards.

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Outside the site →Heat consumerNeighbours or a heat networkReceiving heatData hallOnly water in and outPlant roomAll CO2PRO units together · R744 inside eachDry coolersHeat released to airAvailable when neededHeat to the neighbours
  1. 1Data hall Server racks inside. Only a chilled-water circuit goes in and out of the building; no refrigerant enters.
  2. 2Plant room All the CO2PRO units in one place, easy to service and maintain. The CO₂ (R744) circuit is sealed inside each unit.
  3. 3Heat to the neighbours The hall never needs its own heat. When someone else does – a neighbour, a heat network – the hot water goes there.
  4. 4Dry coolers When nobody needs the heat, the diverter sends the hot water to the fans and the heat goes to air.
Only water crosses the wall of the data hall. All the CO2PRO units stand together in their own plant room, and the CO₂ (R744) circuit is sealed inside each unit. The heat leaves as hot water: to neighbours or a heat network when someone needs it, otherwise to the dry coolers, where it goes to air. Illustrative system principle, simplified. Not a delivered installation.

Challenges we can help with

  1. Chilled water for the facility loop

    Cooling at the facility loop interface, sized to the hall as it is today and at full build-out.

  2. Heat reuse to the building or a heating network

    The heat removed from the hall is delivered where it can be used, instead of being rejected.

  3. Part load and redundancy

    Several units in parallel for N+1 redundancy, with part-load operation as the hall fills up.

  4. Figures for reporting

    Flow, temperatures and running state on one screen, so energy reporting is a readout rather than an estimate.

What the plants offer

Cooling and useful heat from one machine
Water-to-water chiller and heat pump in one unit, ejector available as an option.
Scalable from low to high capacity
A model series per family, and several units in parallel when the duty grows. Sized to your figures, never read off a shelf.
R744, a natural refrigerant
Not toxic, not flammable, GWP of one, and no phase-out date. It does not require a fire-rated EX machinery room, and it is well suited to heat recovery.
Made for retrofit
Compact units that fit into existing machinery rooms and plant rooms, replacing older plants without rebuilding the room around them.
PLC-controlled HMI with options
Our own control system and screen, with integrated flow measurement, valve control, remote access and a range of options chosen for your plant.

How it works

Illustrative system principle

  1. Data hall

    The facility water loop carries the heat away from the hall.

  2. CO₂ plant

    Chills the loop and lifts the heat to a useful temperature in the same machine.

  3. Heat receiver

    The building itself or a local heating network.

Cooling only
The loop is chilled and the heat is rejected outside, as any chiller does.
Cooling with heat reuse
The same machine delivers the heat to the receiver instead, when there is one that can take it.

Relevant systems

Process cooling and heating

CO2PRO Chiller/Heat

Chilled water for the facility loop and heat delivered to the building or a heating network, from one machine. Tell us the loop temperatures and the redundancy you need, and we will say plainly whether it fits.

Explore process cooling and heating

Send us the loop and the load.

Send the dutyDiscuss distribution

Related

Industrial heating and cooling

Many sites buy energy for heat while the cooling plant rejects heat. One CO₂ plant can do both jobs, when the temperatures and the timing of the loads fit.

Learn more

Process cooling and heating

A CO₂ chiller and a heat pump in one unit. The heat your process gives off does not leave through the roof — it comes back as hot water you can use.

Learn more