Transition

A2A, in partnership with Qarnot, is opening a data centre from which heat is recovered

At the Lamarmora power station in Brescia: it will help to supply the district heating network with an initial annual output of 800 MWh of thermal energy

3' min read

Translated by AI
Versione italiana

3' min read

Translated by AI
Versione italiana

A2A has opened a new data centre at the Lamarmora power station in Brescia, designed by the French company Qarnot. Thanks to an advanced liquid-cooling system, the centre recovers thermal energy at high temperatures – up to 65 °C – which is fed directly into the grid to supply heat to buildings.

The project is one of the first applications in Italia of heat recovery from data centres, and the first in a city-wide network to use innovative liquid cooling technology; it addresses a global energy challenge: harnessing the waste heat from digital infrastructure – which is constantly expanding and highly energy-intensive – to produce useful thermal energy for cities.

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“The rapid expansion of data centres and the growing electrification of consumption require significant investment in electricity networks to meet the increased demand for energy. But it also presents an extraordinary opportunity for cities with district heating networks: to recover waste heat from servers and convert it into thermal energy,” explained A2A’s CEO, Renato Mazzoncini: “The pilot project with Qarnot that we are launching today is proof that integrating energy recovery into the design of data centres from the outset means creating strategic infrastructure for the future: more competitive cities, more sustainable regions, and heat available where it is needed, without the need for fossil fuels.”

“Once again, Brescia has proved itself to be a ‘laboratory city’, trialling increasingly advanced technologies to reduce CO₂ emissions into the atmosphere,” added Laura Castelletti, Mayor of Brescia: “Just as was the case with district heating in the 1970s, when Brescia, together with ASM, was the first in Italia to make this infrastructure available to its citizens, today we are launching a new technology that refines our strategies for tackling air pollution and marks a step forward towards the city’s decarbonisation.”

“This first project carried out in Italia represents a strategic milestone for Qarnot,” explained Paul Benoit, CEO and co-founder of Qarnot: “Made possible thanks to our partnership with A2A, it enables us to meet the growing demand in the Italian market for high-performance computing (HPC) cloud solutions that are energy-efficient and capable of ensuring a high level of technological autonomy. Our infrastructure is particularly well-suited to sectors such as the automotive, aerospace, energy and maritime sectors, and, more generally, all simulation-intensive industries: fields that require not only computing power, but also data control and security. Our model enables us to cover the entire HPC cloud value chain, from the design of low-emission infrastructure to the provision of high-performance computing services. By designing data centres capable of generating reusable heat, we combine performance, sustainability and the creation of value for the local community.”

This initiative continues the process launched by A2A to make district heating increasingly sustainable, through various projects aimed at recovering and utilising the decarbonised heat sources available in the area: from heat generated by the thermal power plant and its flue gases to that from other industrial sources such as the Alfa Acciai and Ori Martin steelworks, right through to the use of thermal storage tanks for hot water. Thanks to these solutions, which have helped to reduce reliance on gas, 83 per cent of the heat distributed in Brescia in 2024 will come from non-fossil sources. This proportion is set to grow further thanks to the contribution of computational processes in data centres.

The Qarnot project is structured in two phases. The first, which is already operational, comprises 30 QBx computing units capable of generating around 800 MWh of thermal energy per year, thanks to liquid cooling, which allows heat to be recovered at temperatures of up to 65 °C – suitable for direct use in the district heating network via heat exchangers. Air cooling, on the other hand, recovers heat at around 30 degrees, requiring the thermal gap to be bridged using heat pumps. The second phase, Qarnot 2, is already at the design stage and involves the installation of servers in the former coal store at the Lamarmora power station.

The project, which is receiving European funding, will produce 16 GWh of clean thermal energy per year, enough to supply heating and hot water to around 1,350 flats. The aim is to have it up and running within the next two years.

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