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HP's latest datacentre is built on 13.4ha of land out in Western Sydney. It has been designed from the ground up, in the form of three separate shells that are able to operate independently of each other. So far, the first shell has been completed, within which reside two cells. Only one of those two cells is finished at this point.
These tanks store water, but they're not for cooling the system — they're for fire suppression. Instead, the site uses the cooler local climate in Western Sydney to air-cool the facility as much as possible. This reduces the centre's reliance on condenser-based cooling and is key to the facility achieving what HP claims is a 40 per cent improvement in energy efficiency, compared to its closest competitor.