Dr. Emma Rose

So the glycol just provides an extra bit of coolant to absorb more of the heat.

It also provides antifreeze properties.

So if it got particularly cold, then the water is not going to freeze as it's out here.

So we are standing next to one of our hybrid coolers.

They're effectively very, very big radiators.

So the coolant goes through some radiator pipes and above them are three massive fans that pull in the air from above and that cools the liquid as it runs through the radiator pipes.

That's right, yeah.

So on a day like today when it's a relatively, yeah, there's a relatively cool wind, it's not a particularly hot day, then these coolers, they run in what we call dry mode.

So we're not losing any of the, any water here.

It's, yeah, it's a closed loop.

The coolant returns back to the system.

If the temperature, the outside temperature gets a bit hotter, then...

These radiators will start dripping water down the outside of them.

That just provides a bit of extra cooling through evaporative cooling.

So there's two coolers out here to cool the two sets of racks that we've got inside.

Each one of them uses about 16 kilowatts of electricity if it's running at full capacity.

Bear in mind that each side of Isambard AI will use up to two megawatts.

So 16 kilowatts to cool two megawatts worth of heat.

Because the UK doesn't get that hot, we estimate that we would lose and drain away about 21 houses, their typical UK homes worth of water in a year.

So if you think an average sort of cul-de-sac in a town with 21 houses in it, the amount of water that those 21 houses would use is roughly what we think we'd use in a year.