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Kickstarted by the Etablissement Public d’Aménagement Paris-Saclay (EPAPS) public development agency, the Paris-Saclay campus is a highly ambitious project. The goal here is to bring together over 1,740,000 m2 of higher education establishments, universities, laboratories, public and private research centres, and high-tech companies for a positive-energy academic and scientific hub that combines eco-friendly, sustainable, and economic development.
Our cutting-edge expertise ensured we were selected to take on this high energy efficiency project. The EPAPS entrusted us with their development plans, contracting us to handle design, development, operations and maintenance for the site. The contract applies to the entire cooling and heating network set to supply the Paris-Saclay urban campus. Idex will take on responsibility for all heating, domestic hot water, air-conditioning, and cooling needs for over a hundred buildings.
Intermediate geothermal energy refers to the solar energy stored underground in the form of calories - a major source of renewable heat. In our case, the network is structured over a calorie-distribution system fed into by the Albien aquifer groundwater in the Paris basin. The Albien aquifer contains an estimated 700 billion m3 of high-quality water reserves.
Heat pumps supply the heating and cooling system using water heated to 30°C, a temperature that ensures residual energy currently unrecovered and left over from research activities and processes on the Plateau de Saclay can be reused, with no additional energy needed.
The heating and cooling network will be linked up to a smart electricity network to form Paris-Saclay’s very own multi-energy smart grid. This network’s ground-breaking USP lies in its high-performance buildings that are interconnected to one another. Its eco-friendly design and the manner in which it is paving the way forward for smart energy management across the region and scientific cooperation make it a flagship French tech project in the energy transition sector.
Recovering local renewable energy
Getting users’ and occupants’ energy bills under control, with the focus on competitive pricing in the short term, and total stability over the long term
Harnessing the region’s incredible wealth of resources to design the energy services of the future
Slashing the urban campus’s carbon footprint (CO2 emissions of under 75g of CO2/kWh, three times less than gas).
8,1 km of heating network line
5 km of cooling network line
8,9 km of warm water network line
55 substations
6 100 tonnes of CO2 saved every year
4 geothermal drills in the Albien aquifer (-700 m, 30°C, 400 m3/h)
2 heat and cold production thermal stations
Idex runs and manages the urban air-conditioning and heating network in Paris-La Défense, Europe’s largest residential and business district, via its Enertherm subsidiary. It is now France’s largest cooling and heating network. The infrastructure here meets the daily energy needs of thousands of people, all in stringent compliance with the very best practices in force in terms of health, safety, the environment, and energy performance.
As the concessionary for Géneria (the La Défense region’s urban heating joint association) until 2032, Idex produces and distributes heat and chilled water across the residential and business district. Idex subsidiary Enertherm is the contracting authority tasked with developing and maintaining all the infrastructure needed to provide this service, at its own risk and cost. It is also responsible for ensuring the service runs smoothly.
The Courbevoie – La Défense station and that of Nanterre were renovated and upgraded in 2005 and 2008 respectively. They supply the energy needed to power urban heating and air-conditioning for the buildings linked up to the network, for a total of 160 office blocks and public-sector offices, as well as 66 housing units and 56 retail spaces.
The Courbevoie – La Défense station comprises a heat production unit with a decanting via piggybacking zone, a desulphurisation unit, cold production, and ice storage. The idea behind ‘energy storage’ is to create flexibility and bolster energy systems’ reliability, rebalancing energy supply and demand over the long term. This storage serves as an emergency solution and provides back-up assistance when air-conditioning demand is high.
The heating network operates via the two aforementioned stations, as well as two additional remote stations (Carpeaux and Valmy), which feed into the pipe network used to transport superheated and chilled water to the buildings’ delivery points. The pipe network is primarily installed in tunnels.
The Paris-La Défense heating and cooling network contributes to a wider sustainable development policy, thanks in particular to its four-fold certification (ISO 9001, ISO 14001, OHSAS 18001, and ISO 50001), and to the investment injected into major works in 2008 and 2014 (GFVT) that has resulted in greenhouse gas emissions being halved.
As committed as ever to achieving energy efficiency and tightly-controlled greenhouse gas emissions, Idex is currently developing plans to transform and upgrade two of the four oil-fired boilers. Once these renovation works are completed, the boilers will be fuelled by agro-pellets, granules made of agricultural waste and by-products, becoming the first heating network in France and Europe to harness this type of energy!
24 km of heating network line et 14 km of cooling network line
3 500 000 m2 supplied
296 MW: power for the two heating stations
114 MW: power for the cooling station
12 MW: heating power from the thermo-refrigerating pump
8 MW: cooling power from the thermo-refrigerating pump
12 MW: power from the gas cogeneration system
45 MW: agropellet station (currently in development)
As part of our quest to help build sustainable cities, we took up the challenge set by the greater Bordeaux area and the Bordeaux Euratlantiquet Etablissement Public d’Aménagement (EPA, public development agency): supplying heating to 570,000 m2 of new-build BBC (low-energy consumption) buildings and linking up 11,000 existing housing units via a heating network that draws 90% of its energy from the Astria household waste recovery plant.
Greenhouse gas (GHG) emissions contribute to the greenhouse gas effect, which in turn increases global warming around the world. With this in mind, the Bordeaux greater area and its public development agency decided to embark on a mission to reduce these emissions by building an eco-district underpinned by an urban heating network.
We developed a local energy solution in which 90% of the network is powered by the Unité d’Incinération des Ordures Ménagères (household waste incineration unit) in Bègles (UIOM ASTRIA). The Bordeaux greater area’s waste recovery and processing centre lies at the heart of this network.
To ensure uninterrupted service during the UIOM ASTRIA’s maintenance periods, a gas-powered heating system was built at the Bordeaux Brienne Marché d’Intérêt National.
They require high urban density, space, and availability of renewable local resources.
In this example, the Unité d’Incinération des Ordures Ménagères de Bègles (UIOM) has been transformed into an fully functional heating station.
A cooling system is in place, drawing on recovery of waste heat produced by the unit. The power available to the heating network is greater than domestic hot water need in the summer season. This means that the available waste heat can be absorbed and reused in the cooling system come summer.
90% recovered renewable energy
27 000 The equivalent of homes supplied
18 km of network line
15 000 tonnes of CO2 saved every year
No fewer than 74 hectares have been renovated into an eco-district, primarily located across Renault’s former industrial sites, and now transformed into offices, housing, retail spaces, facilities and public spaces that blend seamlessly in with the local landscape.
Before the project launched, the town of Boulogne-Billancourt put forward a number of smart energy and architecture options. Idex was chosen to handle operations and maintenance works for the heating and air-conditioning installations, thanks to its expertise in managing multi-energy networks. For this project, we combined several sources of renewable energy and local energy, all in line with sustainable development policy.
Traditionally, electricity, natural gas, heating, cooling, and water supply networks were designed as independent, standalone systems.
Even today, each tends to be managed on an individual basis. But when it comes to energy transition, the future lies in thinking holistically.
Developing an eco-district means drawing on a start-to-finish overview of available energy, and harnessing complementary attributes by creating synergies between networks. The end goal is to incorporate as much local and renewable energy as possible.
We set up a cooling and heating network powered by three different sources of energy, thereby ensuring uninterrupted heating and cooling supply thanks to:
This is the first BBC RT 2012-certified network (title V). ‘BBC’ is an acronym that stands for bâtiment basse consommation in French, meaning ‘low-energy building’.
When combined with French thermal regulation RT 2012, it aims to reduce buildings’ energy consumption. The regulation entered into force in 2013, and was reviewed by the various Grenelle environmental round tables. The standard applies to new-build housing, and restricts annual energy consumption per square metre to 50 kWh. It highlights the importance of using renewable energy.
The steam heat exchanger is fully integrated into the infrastructure of a co-ownership unit. The ice storage and cooling units, meanwhile, have been incorporated into the Pont de Sèvres bridge’s abutments. The thermo-frigorific station has been installed underground in a park. These invisible energy infrastructures gave the architects free rein, allowing them to let their creative juices flow with zero visual constraints linked to heating and air-conditioning technical installations.
Idex is now a leading name in the sector, with a portfolio of 50 urban heating and cooling networks that span small rural networks to a network that covers the La Défense district. Solutions that strike the perfect balance between comfort, controlled costs, and sustainable development.
14 km of heating network line
12 km of cooling network line
1 000 000 m2 supplied
100 000 MWh of heating
40 000 MWh of cooling
2 thermo-refrigerating pumps (17 MW and 6 MW)
10 shallow geothermal wells
(-40 m, 15°C, 1 500 m3 /h)
Rezé’s urban land association (association foncière urbaine libre, AFUL) signed up to support plans to create a wood-fired heating network to serve the Rezé-Château district. This project was entrusted to Idex as part of a 20-year contract.
The heating network upgrade and extension works have now been completed, and have extended the network from 1 km to close to 7 km in total.
- This is the only way of using low CO2-emitting renewable energy on a wide scale. It is a viable alternative to gas and electricity.
- By drawing on an alternative to fossil fuels, it allows us to adapt in line with energy market fluctuations.
- It contributes to creating jobs thanks to the steps involved in collecting, converting, and using wood fuel.
The heating network features a new boiler room primarily comprised of a 5 MW wood-burning boiler and two gas boilers with combined power of 13 MW.
The Château de Rezé district boiler room heat output is low-temperature, meaning water under 110°. It is distributed via a pre-lagged, pre-insulated steel heating network.
In 2017, this boiler room supplied 14,550 MWh for the benefit of all users. 69% of all production drew on biomass energy in the form of wood chips and end-of-life wood sourced from within a 100 km radius. Idex undertakes to supply heating at a competitive price. In addition to wood energy fuel coming in cheaper than fossil fuel energy, subscribers benefit from discounted VAT rates.
5 MW of wood-fuelled power
12,8 MW of gas-fuelled power
5,5 km of network line built
1 km of existing network line
32 substations, of which 22 were newly built
5 000 tonnes of wood used every year
80% biomass cover rate
3 000 tonnes of CO2 saved in 2017
6 000 tonnes of CO2 saved since the network was put into service
The "idex.fr" website (hereinafter the "Website") is owned by IDEX SERVICES, a company registered in France under company number 632.037.982 (Nanterre RCS), whose registered office is at 148-152 route de la Reine in Boulogne Billancourt (92100) (hereinafter "Idex", “we”, “us” ans “our”).
Idex is responsible for the processing of your personal data collected through this Website (hereinafter the "Data").
If you have any questions regarding the collection and processing of your Data by Idex, you can contact our Data Protection Officer (DPO) by e-mail at the following address: dpo@idex.fr.
The personal data that we collect and process about you, are:
- Information about your device, such as its IP address, cookie ID, the pages of the Website viewed through your device and the time your device accessed our Website;
- All the data you choose to send us or provide us with, for example, via our contact form;
- Your geographical position in the "find my agency" page or, failing that, your postcode.
The personal data that we collect and process about you, allows us to:
- Respond to your enquiries;
- Request a quotation via the forms available on our Website;
- Process your applications;
- Follow the Website’s activity, number of visitors, pages consulted;
- Improve our Website and to present high-performance content;
- Ensure the proper functioning and security of the Website;
- Send the contact details of the closest agency;
- Send newsletters.
The processing of your Data for the purposes of responding to your requests of information or quotations, sending newsletters, geolocation and applications are based on your consent.
The processing of your Data within the scope of the security and well-functioning of the Website is based on our legitimate interest in ensuring the security of the platforms that we administer.
We store your Data:
- 3 years from the last contact we had with you (e.g. request for information from you) if you are not a customer; or
- 2 years from the last contact with you, if you are a candidate;
In accordance with the terms of the contract if you are a customer, and at least for 3 years from the end of our business relationship.
Your traffic data and login details are kept for one year, in case of inactivity on our Website.
At the end of the retention periods indicated above, we will delete your Data. Before the expiry of these periods, we may contact you again to find out whether you agree to a longer retention period for your Data, in which case the periods indicated above will start to run again.
While providing our services, we may transmit or give access to your Data to the following departments and processors:
- Idex's communication and marketing department, for the management of the Website and for the analysis of the Website's traffic;
- Our subcontractor ensures the evolutionary maintenance and the third-party application maintenance of the Website;
- Our subcontractor providing the hosting of the Website;
- Google, for the statistical analysis solution of cookies (see their privacy policy [link]).
Idex may disclose your Data to third parties where such disclosure is permitted and required by law or court order, or where such disclosure is necessary to protect and defend its rights.
Apart from these cases, your Data will not be transferred or made accessible to any third party without your prior consent.
Idex does not transfer your Data to any country outside the European Union.
You have a right of access to your Data, the right to request its correction, deletion, or portability, as well as the right to request the limitation of the processing of your Data, to withdraw your consent and to set guidelines on the fate of your Data after your death.
You also have the possibility to object at any time:
- Processing for prospection purposes implemented by Idex;
- For reasons relating to your situation, to processing based on Idex's legitimate interest.
These rights may be exercised at any time by sending an e-mail to the following address: dpo@idex.fr, with the subject line "Request to exercise rights" or to the following postal address: My personal data - 148/152 Route de la Reine, 92100 Boulogne Billancourt.
You also have the right to lodge a complaint with a supervisory authority.
The French supervisory authority is the Commission Nationale de l'Informatique et des Libertés (CNIL), 3 Place de Fontenoy - TSA 80715 - 75334 PARIS CEDEX 07.
Le présent site internet « idex.fr » est la propriété d’IDEX SERVICES, Société par Actions simplifiée au capital de 28 646 600,00 euros dont le siège social est situé à BOULOGNE-BILLANCOURT (92100), 148-152 route de la Reine, immatriculée au Registre du Commerce et des Société de Nanterre sous le numéro 632.037.982.
L’utilisateur de ce site internet reconnaît avoir pris connaissance de la présente notice légale et s'engage à la respecter.
IDEX SERVICES se réserve le droit de corriger, à tout moment et sans préavis, le contenu de ce site internet. En outre, IDEX SERVICES décline toute responsabilité en cas de retard, d'erreur ou d'omission quant au contenu des présentes pages de même qu'en cas d'interruption ou de non-disponibilité du service.
Le contenu de ce site internet est la propriété d’IDEX SERVICES et bénéficie de la protection des lois sur la propriété intellectuelle. La reproduction (partielle ou totale), la transmission (électronique ou par d’autres moyens), la modification, la liaison ou l’utilisation de logos, photographies, images, cartes, textes ou, plus généralement, de tout élément publié sur ce site est interdite.
Toute violation de cette disposition constitue un acte frauduleux passible de poursuites civiles et pénales.
L'utilisateur est informé que lors de ses visites sur ce site internet, un cookie peut s'installer automatiquement sur son logiciel de navigation. Un cookie est un élément qui ne permet pas d'identifier l'utilisateur mais sert à enregistrer des informations relatives à la navigation de celui-ci sur ce site internet. L'utilisateur pourra désactiver ce cookie par l'intermédiaire des paramètres figurant au sein de son logiciel de navigation.
La création de liens hypertextes vers le site « idex.fr » ne saurait, en aucun cas, engager la responsabilité d’IDEX SERVICES. Les liens hypertextes établis en direction d'autres sites à partir de ce site ne sauraient, en aucun cas, engager la responsabilité d’IDEX SERVICES. »
The "idex.fr" website (hereinafter the "Website") is owned by IDEX SERVICES, a company registered in France under company number 632.037.982 (Nanterre RCS), whose registered office is at 148-152 route de la Reine in Boulogne Billancourt (92100) (hereinafter "Idex", “we”, “us” ans “our”).
Browsing on this Website gives rise to the deposit of cookies and web storage technologies (hereinafter “cookies”)
Cookies are small text files stored on your device, which contain a certain amount of Data about your navigation (e.g. date, time and number of visits, source of arrival, preferences).
A third-party cookie is placed on your device by someone other than Idex.
These third parties install cookies when you are connected to their websites or when you consult our Website. These cookies permit to monitor behaviour on a network of websites by analysing the history of visits, for targeting purposes.
Idex does not have access to these cookies, to find out more on how they use these cookies, you will need to visit the websites of those third parties.
Permanent cookies are stored on your terminal until its expiry date (maximum 13 months) or until you delete it.
Session cookies are automatically deleted when you exit your browser.
The cookies deposit on your terminal implies the collection of your consent, or of our legitimate interest in the case of strictly necessary cookies.
Thus, as soon as you arrive on our Website, a cookie banner pops-up and gives you some information regarding our use of cookies. This banner allows you to accept or refuse all or part of the cookies that we use.
Moreover, you can change your preferences or withdraw your consent at any time by clicking on the following link: Set cookies [link to cookie settings].
The deletion of functional cookies, which are necessary for the provision of content by Idex, may prevent you from accessing certain content on the Site.
Idex declines all responsibility for the consequences related to the degraded functioning of its Website in the case of you have refused or required to delete the strictly necessary cookies.
You also have the possibility to manage the deposit of cookies using your browser settings, by the means described below.
Choices offered by your navigation software: You can configure your navigation software so that cookies are saved on your device or, on the contrary, that they are rejected, either systematically or according to their transmitter. You can also configure your browser software so that you are offered the choice of accepting or rejecting cookies before a cookie is likely to be stored on your device.
The management of cookies differs according to the configuration of each browser. For more details, click on the links below.
- For Internet Explorer™ : http://windows.microsoft.com/fr-FR/windows-vista/Block-or-allow-cookies
- For Safari™ : https://support.apple.com/kb/ph21411?locale=fr_CA
- For Google Chrome™ : http://support.google.com/chrome/bin/answer.py?hl=fr&hlrm=en&answer=95647
- For Firefox™ : https://support.mozilla.org/fr/kb/activer-desactiver-cookies-preferences
- For Opera™ : http://help.opera.com/Windows/10.20/fr/cookies.html
This parameterisation is likely to modify your Internet browsing and your conditions of access to certain services requiring the use of cookies.
This setting will not prevent advertisements from being displayed on the websites you visit, but it will block technologies that allow advertisements to be tailored to your interests.
For more information on cookies and their use, you can consult the site of the Commission Nationale de l'Informatique et des Libertés (CNIL) at the following address: https://www.cnil.fr/fr/site-web-cookies-et-autres-traceurs.
You can opt out of resetting your ad ID and changing the privacy settings on your smartphone. To set your privacy settings:
- Apple system : https://support.apple.com/fr-fr/HT201265
- Android system : https://support.google.com/chrome/answer/95647?co=GENIE.Platform%3DAndroid&hl=fr
These cookies ensure the essential functionalities and the proper functioning of the Website. They cannot be deactivated from our systems. You can however configure your browser to block or be alerted to the use of these cookies. If this is the case, certain parts of the Site will not be able to function.
The use of these cookies by our Website is based on our legitimate interest to ensure the security, technical functioning and accessibility of the Site and our various services.
The strictly necessary cookies used are
These cookies allow us to anonymously analyse page traffic (number of visits, visitor activity, return frequencies), how you navigate on our Website and the Website's performance.
Google may place additional (third-party) cookies on your device for this purpose. These cookies are governed by Google's own data protection policy, which can be accessed by clicking on the following link: https://policies.google.com/privacy?hl=fr&gl=fr
The use of these cookies is based on your consent. If you refuse these cookies, we will not be able to know when you visited our Site, nor will we be able to know the path of your navigation on our Site.
On some pages of the Website there are buttons or modules of third-party social networks (Facebook, Twitter, LinkedIn, Youtube, etc). They allow you to use directly via our Website, features of these networks such as sharing, viewing, or liking content.
If you use the social networking features, information about you will be collected. This allows IDEX to count the number of times you view a video or the number of times you share a post/video.
The use of these cookies is based on your consent, if you refuse these cookies the social networking features will not function, and we will not collect information about your use of these social networks.
3.4. Geolocation cookies
A geolocation cookie is downloaded on the Website via your browser to collect data relating to your geographical location. The aim is to enable you to find the agency closest to you.
Acceptance of the sharing of your geolocation is managed directly via your browser or your device.
You can manage geolocation from your browser settings. Below are the instructions for Google Chrome, Firefox, Safari and Internet Explorer:
Google Chrome: https://support.google.com/chrome/answer/142065?hl=fr
Safari: https://support.apple.com/fr-fr/HT5403
Firefox: https://www.mozilla.org/fr/firefox/geolocation/
Internet Explorer : https://support.microsoft.com/fr-fr/help/17479/windows-internetexplorer-11-change-security-privacy-settings
Geolocation can also be blocked at the level of your operating system. Below you will find instructions for iOS, Android and macOS:
iOS: https://support.apple.com/fr-fr/HT203033
Android: https://support.google.com/nexus/answer/3467281?hl=fr
macOS: https://support.apple.com/fr-fr/HT5403
The use of this cookie is based on your consent, if you refuse these cookies you will have to fill in this information manually to use this feature.
Host | Nom | Durée | Description |
---|---|---|---|
accounts.google.com | GAPS | Entre 1 mois et 2 ans |
Ce domaine appartient à Google. La principale activité commerciale est « User Accounts sub-domain ».
|
doubleclick.net | test_cookie | 15 minutes |
Ce domaine est la propriété de Doubleclick (Google). La principale activité commerciale est : Doubleclick est une « real time bidding advertising exchange » |
doubleclick.net | IDE | 1 an |
Ce domaine est la propriété de Doubleclick (Google). La principale activité commerciale est : Doubleclick est une « real time bidding advertising exchange » |
youtube.com | YSC | Durant la session |
YouTube est une plateforme appartenant à Google pour l'hébergement et le partage de vidéos. YouTube collecte des données sur les utilisateurs par le biais de vidéos intégrées dans des sites web, qui sont agrégées avec les données de profil d'autres services Google afin d'afficher des publicités ciblées aux visiteurs de leur propre site web et d'autres sites. |
youtube.com | VISITOR_INFO1_LIVE | 6 mois |
YouTube est une plateforme appartenant à Google pour l'hébergement et le partage de vidéos. YouTube collecte des données sur les utilisateurs par le biais de vidéos intégrées dans des sites web, qui sont agrégées avec les données de profil d'autres services Google afin d'afficher des publicités ciblées aux visiteurs de leur propre site web et d'autres sites. Ce cookie est utilisé comme un identifiant unique pour suivre la visualisation des vidéos |
youtube.com | GPS | 30 minutes |
YouTube est une plateforme appartenant à Google pour l'hébergement et le partage de vidéos. YouTube collecte des données sur les utilisateurs par le biais de vidéos intégrées dans des sites web, qui sont agrégées avec les données de profil d'autres services Google afin d'afficher des publicités ciblées aux visiteurs su site. |
In accordance with the French Data Protection Act of 6 January 1978 as amended and with the GDPR, you have the right to access, rectify, oppose, delete, and limit information from cookies and other web storage technologies.
These rights may be exercised at any time by sending an e-mail to the following address: dpo@idex.fr, with the subject line "Request to exercise rights" or to the following postal address: My personal data - 148/152 Route de la Reine, 92100 Boulogne Billancourt.
You also have the right to lodge a complaint with a supervisory authority.
The French supervisory authority is the Commission Nationale de l'Informatique et des Libertés (CNIL), 3 Place de Fontenoy - TSA 80715 - 75334 PARIS CEDEX 07.