Installation of new generation cooling systems

STMicroelectronics met en place des groupes froid nouvelle génération ainsi que des systèmes de free cooling afin d’améliorer la performance énergétique de ses sites et de réduire leur consommation de gaz naturel.

Main project's drivers for reducing the greenhouse gas (GHG) emissions

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Energy and resource efficiency

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Energy Decarbonisation

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Energy efficiency improvements

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Improving efficiency in non-energy resources

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Emission removal

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Financing low-carbon issuers or disinvestment from carbon assets

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Reduction of other greenhouse gases emission

Project objectives

Improve the energy performance of the industrial processes used and decarbonize the energy used on these sites.

Detailed project description

This project includes two actions:

  • The installation of refrigeration units with energy recovery, which offer two main advantages. Refrigeration units cool down the production equipment in the clean room more efficiently than the current units. The heat recovered from these refrigeration units is used to heat the sites’ offices, without having to use traditional town gas boilers.


  • The installation of a free cooling system that uses the outside air to cool down the production equipment, thereby reducing the use of refrigeration units in the intermediate seasons.

The structural design phase began in Q4 2020 and the project will be completed in 2021.

Emission scope(s)

on which the project has a significant impact

Scope 1

Direct emissions generated by the company's activity.

Scope 2

Indirect emissions associated with the company's electricity and heat consumption.

Scope 3

Emissions induced (upstream or downstream) by the company's activities, products and/or services in its value chain.

Emission Removal

Carbon sinks creation, (BECCS, CCU/S, …)

Avoided Emissions

Emissions avoided by the activities, products and/or services in charge of the project, or by the financing of emission reduction projects.

Scope 1 – Lower use of gas boilers to heat clean rooms or offices 

  • Quantification: 1,300 tCO2/year

Scope 2 – The chillers and free cooling systems use less electricity  

  • Quantification: 300 tCO2/year 

Using the heat produced by the operation of the cooling units lowers the consumption of natural gas (7.27 GWh[GCV]/year) or 1,338 tCO2/year (considering an emission factor of 184 tCO2/GWh GCV).

The increased efficiency of the chillers and the use of free cooling systems saves 6.9 GWh/year, which represents 300 tCO2/year considering an emission factor of 43 tCO2/GWh.

Key points

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Invested amount

More than 10 M€ in this project for the 3 sites.

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Starting date of the project


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Project localisation

Crolles (Isère), Rousset (Bouches-du-Rhône), Tours (Indre et Loire) et Rennes (Ille et Vilaine)

Project maturity level

Prototype laboratory test (TRL 7)

Real life testing (TRL 7-8)

Pre-commercial prototype (TRL 9)

Small-scale implementation

Medium to large scale implementation

Economic profitability of the project (ROI)

Short term (0-3 years)

Middle term (4-10 years)

Long term (> years)

Illustrations of the project

Installing new generation cooling systems contributes to the following Sustainable Development Goals (SDGs):

  • SDG 7 Affordable and Clean affordable energy: lower energy use (heat recovery, and more efficient cooling units) and lower energy carbonation (free cooling from the outside air).
  • SDG 9 Industry, Innovation, and Infrastructure: improving the sustainability of ST’s industrial site, thanks to lower operating costs and reduced equipment obsolescence.

The chillers with heat recovery and free cooling systems can also be installed on other sites in Europe. The feasibility study is underway.

These systems can also be installed on sites outside Europe. The potential is equivalent to the total for Europe. The feasibility study will take place in 2021.

Two partnerships have been established with:

  • EDF-Dalkia
  • Engie
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Contact the company carrying the project

STM’s other projects :