Installation of a tri-generation plant

In order to stop gas consumption on its production site in Lentzweiler (Luxembourg), Tarkett has the project to install by 2024 a tri-generation plant on its site which will stop the incinerator currently used in the production process.

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

Reduce GHG emissions at the Lentzweiler site by eliminating the use of gas and stopping the incinerator

Detailed project description

The project consists in installing a tri-generation plant (capacity 52kt of wood/year) in partnership with Engie close to the Tarkett plant.


  • To supply Tarkett with 47GWh/year of energy :
    • Thermal (28 GWh/year for the process and 7.3 GWh/year for heating)
    • Refrigeration (9.6 GWh/year)
  • Inject 36.3 GWh of electricity into the Luxembourg grid
  • Recover fatal heat (30°C < water < 40°C depending on the season) to produce pellets (41,1 GWh/year)


This project is divided into several phases.

Phase 1:

Currently, the thermal oil used in the production processes is heated by the combustion of gas in two

gas in two boilers.

The thermal energy, supplied in the form of steam, will be used to heat the thermal oil

necessary for the process as well as the heating network of the buildings. It will also allow, thanks to an

It will also provide the cold necessary to produce the chilled water required for the process, thanks to an absorption unit.

This will reduce emissions by nearly 8400 tCO2 eq (7200 tCO2 eq for Cofely with the

transport of the Biomass).


Phase 2:

Another project related to the biomass installation is the shutdown of the incinerator currently used to burn

the fumes from the coating line in order to comply with environmental standards.

The incinerator would be replaced by a flue gas condenser.

Shutting down the incinerator would result in savings of 12 GWh/year and a reduction in emissions of 2800 t

CO2 eq.

These 2 joint projects would make it possible to stop consuming gas at the Lentzweiler site.

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 - Stopping the consumption of gas for heating and production Shutdown of the incinerator

  • Quantification: -8.4 ktCO2/year

Scope 1 - Shutdown of the incinerator

  • Quantification: -2.8 ktCO2/year

Scope 2 - Heat (steam) imported from the trigeneration plant

  • Quantification:  Marginal (<1 tCO2/year) 

Avoided Emissions -Injection of electricity produced from the trigeneration plant on the Luxembourg grid

  • Quantification:  -14,8 ktCO2

The Lentzweiler site consumed 47 GWh PCI of gas per year before the project was launched. Considering

an average EF of 239 kgCO2/MWh PCI, this represented nearly 11.2 ktCO2/year.


The cessation of gas consumption for heating and production lines (thermal oil production) as well as the

production lines (thermal oil production) as well as the shutdown of the incinerator will enable the site to completely eliminate its gas consumption.


Phase 1 of the project, which consists of replacing the energy produced by the two gas boilers with the

tri-generation plant will reduce gas consumption by 28 GWh PCI/year for the process part and 7.3 GWh PCI/year for the heating part. We can therefore consider a total saving thanks to phase 1 of the project of about 8.4 ktCO2/year.


Phase 2 aims at stopping the incinerator and the associated gas consumption (12 GWh PCI/year). This is equivalent to to a reduction of emissions of about 2.8 tCO2eq/year (it is considered that the condenser does not smoke does not lead to GHG emissions).


Phases 1 and 2 therefore reduce emissions by 11.2 tCO2eq/year.

The energy required for the site's uses is now produced by the tri-generation plant.

The emission factor of this heat is very low compared to that of natural gas.

The production of the 47GWh (from the tri-generation plant) therefore leads to estimated marginal CO2 emissions (<1 tCO2/year).

The tri-generation plant allows the production of 36,3 GWh/year injected in the Luxembourg grid. In

considering that the emission factor of the electricity of the Luxembourg grid is 410 kgCO2/MWh

(Ademe carbon base). This makes it possible to avoid nearly 14.8 ktCO2/year.

Key points

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Invested amount

About 40 to 50 M€

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Starting date of the project


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Project localisation

Lentzweiler, Luxembourg

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 (> 10 years)

Illustrations of the project

This project brings other benefits:

  • Creation of 10 jobs in the biomass plant
  • Creation of 15 jobs for the pellet plant
  • The wood used (shrubbery, roadside clearing, forestry pellets) will come from a radius of of 200km maximum around the plant

Particular economic set-up with a direct link to Luxembourg aid for this type of project

A long-term commitment contract has been signed with Engie

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Contact the company carrying the project

Tarkett’s other projects :