DATA CENTRES FANS
essential infrastructure – the risks associated with relying on laboratory samples are high. Apart from only representing a snapshot in time, sampling fails to identify dissolved oxygen eff ectively. The latter point is key; oxygen is the precursor to all forms of corrosion, either directly or by creating the conditions for bacteria to thrive, which can lead to microbial induced corrosion (MIC). Thankfully, the sophisticated monitoring aff orded to data
centre air is now available for closed system water, too. We use 24/7 remote condition monitoring to track a range of parameters that can be indicative of corrosive conditions, essentially stopping corrosion before it takes hold. Alerts are sent to responsible parties when a change in stable conditions is detected, allowing for swift investigation and resolution of problems. This approach also reduces water wastage, by reducing unnecessary fl ushing. Flushing, where vast volumes of water are used to clean out a system suspected of contamination, is often used as a knee-jerk reaction – after routine maintenance, for example. Using monitoring, maintenance teams can track the inevitable disruption caused by intervention, and see how quickly
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in-spec conditions return, avoiding fl ushing in some cases where safe levels resume swiftly.
Whether air-cooled or water-cooled, both systems require
eff ective water treatment to maximise energy effi ciency and minimise water wastage – critical to keeping costs down, meeting sustainability targets and ultimately delivering a reliable and consistent service.
Hydro-X Engineering, also part of Marlow Environmental Services Group, has developed an industry-leading cooling tower bleed recovery system that recovers a portion of the bleed water to reuse as make-up water. This approach can save data centres signifi cant amounts of money by reducing the operating costs of cooling plants. Water recycling systems can recover around 60-70% of bleed water, as well as collecting rainwater. If 65% of the cooling tower bleed off can be recovered using an 8m³/hr recycling system, up to £120,000 can be saved every year, quickly recouping the £70,000 installation costs.
www.acr-news.com • November 2024 21
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