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Peter Liddle, associate at Cundall, the consulting M&E engineers for the project, explains, “Facebook Luleå is employing a direct air cooling strategy within their data halls, which uses the cold outside air to maintain the required internal temperature. Luleå’s cold dry climate means that humidification is an essential component within the air conditioning process as without it the internal humidity could drop as low as 2%RH.
“This low level of humidity would be unhealthy for staff and present an increased risk to the servers from electro-static discharge.”
The humidification system at Facebook Luleå is one of the largest installations of its type in the World. Two penthouse ventilation areas above the data halls each incorporate 26 evaporative humidifiers, with the full length of each system stretching over 67m wide and standing 5m high. At full output both systems combine to deliver 11,700 litres of moisture per hour to the air stream entering the data halls, while operating on a maximum of just 32kW/h of electricity.
The HumEvap MC3 humidifier consists of a bank of evaporative cassettes containing a fully bonded particle-free media. Water is pumped to the top of these evaporative cassettes and flows down their corrugated surface. As the air passes through the moist media it is humidified.
The evaporative humidifiers installed at Facebook Luleå incorporate in-tank ultra violet water purification to inhibit microbial growth and maintain hygienic operation. This type of water treatment is more effective than systems fitted to water supply lines or re-circulating hoses, as it purifies the water after it has been exposed to the air stream and continues to be effective when there is no demand for humidity and the water is not circulating.
The recent humidifier installation at Facebook Luleå was the second phase in the data centre’s construction. JS Humidifiers is a member of the Condair Group of humidification companies and the first stage at Luleå saw its sister company, Condair Denmark, manufacture and install a high pressure spray humidification system.
Condair has a dedicated Data Centre Business Development Team that draws expertise from all members of the organisation to benefit clients no matter where they or their projects are located. Other global brands to have put their trust in Condair to fulfil their data centre’s humidity control requirements include Digital Reality, Ebay and Microsoft in the US, Barclays Bank and Citi Group in the UK, NHN in South Korea and Metronode in Australia.
As well as JS Humidifiers’ manufacturing, R&D and sales operations in the UK, Condair also has manufacturing and R&D facilities in Canada, Denmark, Germany, Switzerland and China as well as wholly-owned sales operations in 12 other countries and distributors in over 40 more.
