Territories

La Jarne Town Council

Consulting and research 24/11/2021 La Jarne #SERMET Sud Ouest
Feasibility study for the creation of a biomass heating network.

Type of assignment

Feasibility study for the creation of a biomass heating network.

 

This study aims to:

  • Ascertain the technical and economic feasibility of installing a centralized wood boiler house and a heat distribution network between the supplied buildings (municipal hall, gym and changing rooms, new school, new homes, existing retirement home);
  • Propose a technical solution suited to the context and the site’s possibilities;
  • Find solutions aimed at ensuring sustainable supplies of wood-based fuel;
  • Find and estimate any grants that could help fund the operation;
  • Assess possible operational arrangements to implement the adopted solution

Project leader

About the subsidiary involved in the project

A few figures

2020/2021

Duration of the project

€500,000 to
€1 million

for the works, according to the scenarios under study

Services provided

This study demonstrated that a biomass heating network supplying the future school complex and the 64 new homes to be built in the new designated development area “Les 4 chevaliers”, as well as the nearby retirement home Petites Vignes, would be:

  • technically feasible (a 150 kW woodchip boiler delivering 86% of the heat requirements of the new school, new homes and care home)
  • environmentally pertinent (avoiding roughly 190 tonnes of carbon dioxide equivalent per annum, equivalent to running 85 cars for one year),
  • barely viable from an economic point of view (€89 incl. VAT/MWh, 1.5% less than gas), but this scenario does not include connection to the municipality’s existing buildings (the Mélusine room and the 4 chevaliers football pitch and gym changing rooms), because their heat requirements are too limited.

 

It should be noted that the operation’s economic balance is precarious, as it is based on ambitious choices in terms of optimizing the cost of investment and operating expenses:

  • installing the wood-fuelled boiler room in the future school building to save on the cost of building a dedicated boiler house;
  • heat distribution system in the designated development area devolved on the developer of the designated development
  • area (as is the case for the other systems such as electricity, gas, etc.);
  • disintegrated (rather than granular) wood, which is 25% to 30% cheaper per MWh.

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