Cooling towers

Along the lines of little-discussed but concrete line-item manifestations of climate change expenses:

I’ve now heard of several facilities with cooling towers which struggle to keep up with their loads during times of peak temp/humidity in the summer. For instance,

Rogers said there are strong indications that increasing the water’s flow rate at the cooling towers can increase the operating efficiency under stressful environmental conditions including high wet bulb (the temperature air would have if it were cooled to the saturation point).

OLCF Staff Study Possible Temperature Changes to Chilled Water Systems – Oak Ridge Leadership Computing Facility

In some ways this is unsurprising - a cooling tower is a big infrastructure investment and facilities of all kind naturally push to upgrade, expand, increasing heat loads. On the other hand, big capital investments are usually modelled to account for upgrades, and so a widespread problem suggests that the assumptions and projections that went into the sizing of these units are slightly invalid.

And indeed,

This is despite

https://doi.org/10.1016/j.energy.2018.07.080 (which is talking about natural convection towers):

Mon, Jan 12, 2026

Due to the warm weather, ICT is experiencing cooling system issues in the data centre — which hosts the Plato high-performance computing cluster.

We have made the decision to drain the Plato cluster in order to reduce the heat load in the data centre.

Jobs:

  • Currently running jobs will continue to run to completion

  • Queued jobs will remain in the queue

  • Any new jobs submitted to the scheduler will be queued until the cooling issues are resolved

No action is required on your part.

Thanks for your understanding.
The ARC team

This email was sent in the winter of the coldest province of the year.