DoF - District of Future project

DoF - District of Future project


Share  |


  • OrleansUseCase_Biomass
  • Orleans

The city of Orleans is located in the region Centre, one hour from Paris by train. Orleans is a regional capital, in the centre of an Agglomeration Orleans Val de Loire (270 000 inhabitants) and an urban area including more than 400,000 people.


Full energy-consumption monitoring at a district level, including social housing and municipal buildings.


Three Sources of Energy Generation to be tackled in the project:

  1. Biomass plant (CHP)
  2. Photovoltaic plat
  3. Air Source Pumps


Biomass Plant

25 MWh cogeneration biomass plant is tested in November and December 2012 and is now in Ful Service (2013) in the Area of Study, la Source. 43 000 tons CO2 will be saved each year (50% from substitution to gas for heating and 50% from electricity production). 90 000 tons of wood is needed on a local perimeter (maximum 100 km) to provide the biomass plant.

More information here:


The challenge to be addressed is the individualization of the meters for 13 000 equivalent households heated, but also to balance the energy mix at different seasons of the year (average mix is 72% biomass, 28% gas) and to address the electricity production topic. In connexion with the new biomass plant, the social housing “Les Résidences de l’Orlénais” works with Dalkia to improve the inner cooling system inside the buildings, and to individidualize the consumptions. The project will focus much more on the outputs than on the inputs of the biomass plant.


Photovoltaic plat

It is a 200 m² photovoltaic plat installed in 2009, 20 680 Wc, by TENESOL (Connectis system) with 100 m² left in summer 2012, after vandalism, to be extended to 200m² after final repairing of new school Pauline Kergomard built in 2009). There is already a screen to check production and consumption of energy on that school (2492 m² with objective to product 2/5 of school consumption, with an ROI in less than 18 years).


The screen shows that 61,39 MWh electricity has been produced and 22,72 tons CO2 saved from the installation to November 26th 2012.

Additional cheap features such as “by-pass” or “one inverter per cell” can improve the efficiency of the whole system. The Region Centre is specialized in these technologies imported from the United States, and already produced by ST Microelectronics in France. 


Green roof and solar cells at Kergomard School


Air Source Pumps

The Public Librairy “Médi@thèque” uses 2 heat pumps LENNOX type EAR0812SM2HNFP (2008) with cooling power of 75,5kW and heat power of 79kW each. The expectation was an annual consumption from 107 750 kW/h to 45 045 kW/h and the CO2 emissions divided by 3.

Three Sources of Consumption to be tackled in the project : Nurserie, Medi@tech and Social households.


- Nurserie (biomass) “Bolière” renewed in summer 2012:

It’s a 35 years old building (983 m²), with a 461 000 € investment last years to improve energy performance and user’s wellness. Windows have been changed 3 years ago, and whose roof has been reinforced (isolation) in summer 2012. New heaters installed in 2012 uses the urban heating system, thus it will be connected to the grid and the biomass plant by January 2013. Improvements should be measured with the DoF project, including the new ventilation system in the calculus. 

Lights have been changed for low consumption (4*14 W class A instead of 2*36 W) everywhere, with presence detectors.


Before these changes, the diagnosis was (2008) :

Medi@tech built in 2009 (Maurice Genevois)

This new public library, specialized in web and media delivering, represents a 3 784 941 euros investment. The isolation, the solar orientation, special windows and the green roof (cooling or refreshing system) are supposed to reduce energy consumption and optimize user’s wellness. For what concern the green roof, it is already agreed to renew it in 2013 spring because the thick is not big enough to really makes vegetation works. The improvements should be measured up to the DoF project. As for every building in the municipality, there is already a real time regulation system for the heating/cooling:


The already existing regulation system:

As every public building, the Médi@thèque has an automatic extinction procedure for the computers (21:00 every day). In addition to air-air heating and cooling pumps, the Médi@thèque is connected to the urban heat grid, and thus will benefit from renewable energy after Janurary 2013. Consumption screening in real time, seen by everyone, will be an additional feature, up to the “DoF” project. Screening should show energy consumption information in KWh or some equivalents very relevant and understandable by every user.


- Social households

One “passive social house”, whose new inhabitants arrived on May 15th 2012, will be tackled.


Also the Grisafi Architect designed something very original (pergolas...), not looking like the usual “low consumption boxes”, the building achieved very convincing performances. The energy target was 15kWh/m²/year for the heating and ventilation system, and the first measurement (air leakage) shows that it achieves 13,9kWh/m²/year. Domestic Hot Water control therefore becomes predominant, as it represents 41,1kW/m²/year. Households behaviour can make a big difference too.

Another social “testimony flat” will be tackled in order to compare the performances. Among social houses renewed a roof energy leakage analysis based on a plane pictured map with thermographs scheme as already be done and a “testimony flat” is to be chosen to implant additional meters (2 flats are monitored right now to make the final choice, adresses : 2 A Louis Pergaud street, the other 8 Leopold Sedar Senghor street).


Screening should show energy consumption information in euros.


Smart Grid

one of the first French region tackled by the grid regulators Grid regulators are expected to deliver information on a district scale for gas and electricity consumption.

ERDF will provide this information on electricity consumption as soon as the Linky device is installed. This will eventually allow real-time following of the consumption, from the individual to the district scale.

ERDF Linky system has already been successfully tried in the region of Lyon, and in the region Centre (whose capital is Orleans). As soon as the system, that we include a possibilty to cut off some equipments from the grid, is validated by the government, It can be deployed within an entire city – the size of Orleans – within 2 years, as soon as the details are settled. Final goal is to disconnect temporarily some infrastructures from the networks - 100 000 housing have already tested this kind of solutions in France, with a real decrease (15%) in CO2- or to influence economic actors (including households) behavior, which can lead to an additional saving from 8 to 25% depending on their awareness, their expectations and the point 0.

GRDF can provide this information on gas consumption every day for the big clients (industry), every month for the tertiary buildings (services) and twice a year for most of the consumers. Modeling is used to simulate the consumption between two measurements. GRDF can provide the city of Orleans information for every street of the area. They will use Orleans as a model for other city”s gathering of the data on a geographic scale.


Deployment equipment

Different meters will need to be installed in the three facilities to complete the existing.


Historical information about consumption

It is completely available for use case devlopment and validation.

Back to page

Projects & Scenarios

District of Future Partners more infomation

  •  Telefonica 
  • - Edenway 
  • - everis 
  • - IDP engineering • environment • architecture 
  • - VTT 
  • - Dalkia 
  • - Electric Corby CIC 
  • - Ville d\'Orleans 
  • - Sabadell 
  • - University of Cardiff 
Jose Manuel Hernandez
Project Details
Starting date:
36 months
Total Cost:
6.242.551 €
EU Grant:
3.801.732 €