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Harnessing energy from a PSA foundry to heat the town of Charleville-Mézières

The challenge Dalkia solution Key figures Clients benefits Témoignages Dalkia contact

An innovative heat-recovery system

In 2016, the town of Charleville-Mézières put out an invitation to tender designed to meet three goals : make the Citadelle district heating network more eco-friendly by creating a mix comprising more than 50% renewable and recovered energy, develop the heating network to incorporate new neighbourhoods and Charleville-Mézières hospital, supply heating at competitive rates to as many people as possible. Dalkia was already operating the Ronde Couture system in addition to the Citadelle network, covering more than half the population of Charleville-Mézières, and in June 2017 won the contract to install a biomass heating plant and harness waste heat from the PSA Peugeot-Citroën manufacturing plant to supply clean energy for the network.


The solution : harnessing waste heat from the PSA plant

he PSA plant on the outskirts of Charleville-Mézières is Europe's largest foundry for the automotive industry. The 55-hectare site makes engines and other parts for the carmaker's assembly plants. Dalkia was quick to see the potential in heat recovery at the site, and devised a solution to harness the heat given off by the furnaces for use in the district heating network. The plan immediately sparked the interest of the manufacturer as part of its drive to curb the environmental impact of manufacturing activities.

How it works ?

To create the heat recovery system, an internal network of heat exchangers will be installed on the PSA site to harness the heat given off by six aluminium melting furnaces (300°C) and three sand regeneration furnaces (400°C), which will then be fed into the network - 28 GWh recovered per year.

To create a more eco-friendly supply, the PSA site will also be equipped with an 800 kW biomass heating plant.

Once recovered, the heat will flow through a "transit" system to the Ronde Couture heating network for distribution via the Citadelle network. A gas-fired plant with cogeneration capabilities will be used in winter to provide additional heating to back up the eco-friendly solution.

The Citadelle heating network is due to come on stream on 1 January 2019.

60 %

renewable and recovered energy


equivalent of homes

6 Km

The resulting extension which will span and will supply the Manchester district and hospital complex.

7 000

tonnes of CO2 avoided each year, equivalent to taking 3,930 cars off the road

What are the benefits?

The new solution meets three key goals: it is eco-friendly, urban and cost-effective! PSA will improve the energy performance of its site and make it more competitive while reducing the environmental impact of manufacturing activities. Charleville-Mézières will develop the Citadelle heating network and make it more eco-friendly while benefiting from competitively priced heating. Environmental benefits : 60% renewable and recovered energy, 7,000 tonnes of CO2 avoided each year, equivalent to taking 3,930 cars off the road. Economic benefits : reduced VAT of 5.5% on user energy bills, stable prices avoiding risks related to the volatile price of fossil fuels.

PSA plant in Charleville-Mézières

Given that PSA PEUGEOT CITROËN is the biggest employer in Charleville-Mézières, most of our employees use the heating network, which means they are working to reduce their energy bill, which makes this initiative all the more meaningful.




This is an innovative project in terms of eco-friendly solutions for the region, and will make Charleville-Mézières a pioneer in the field.




Dalkia contact
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