Revolutionary Cooling in the Data Centre

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Revolutionary Cooling in the Data Centre

By Alex Breary
blue water cylinders in cooling system

In 2014 Custodian introduced what is commonly known as evaporative adiabatic cooling into the data centre. It’s a cooling system that nullifies any need for mechanical cooling and it provides a great impact on the data centres efficiency and the environment.

The process in the data centre

For 90-95% of the year, Custodian uses fresh air cooling. However, in the event that temperatures in the UK hits heights beyond that of a set threshold, the revolutionary evaporative adiabatic system comes into play.

Generally speaking, any adiabatic process is a process with the constant amount of energy in the system. Evaporative adiabatic cooling happens when the air temperature is lowered without taking any of the energy out of it and increasing the humidity.

As a data centre, it enables the ability to have an automatic inbuilt efficient humidity control at low-temperature winter-type conditions, which is where you get the real electrostatic discharge issues, ultimately giving better efficiency.


A reverse osmosis plant keeps the water as clean as possible. This will then produce fine mist and within a large chamber, the moisture is used to raise the humidity of the slow moving air which passes through, decreasing its temperature. The system also acts as a room humidifier and is supported by dual water mains which ensures that it is resilient against mains failure.

Importantly, this system is effectively 2N resilient. This is because it runs off of two completely separate duplicate systems. Each system protects the cooling process against failure and should one go down due to an outage or technical issues, the other is there to back it up.

Being a former winner of Green Data Centre of the Year, the environment is at forefront of everything that happens in and around the data centre. This cooling system still allows Custodian to operate within a Class A classification of cooling for high-density computing.

Our brand new data centre is coming soon. Find out more.