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[en] Wastewater, collected and transported in sewers to treatment plants, is a potential source of low-carbon energy through heat recovery. This solution is particularly interesting where consistent flows of wastewater and waste heat circulate close to potential users such as swimming pools and buildings. But before looking for potential users, it is necessary to identify the sections of the sewer network with the highest waste heat recovery potential. The Department of Seine-Saint-Denis decided, as part of its energy and environment policy, to map the waste heat potential of its 550 km combined and separate sewers. Several criteria were studied to select potentially promising sections, including minimum and average dry weather flow rates. Flow rate data are abundant but disseminated in numerous documents resulting from temporary measurement campaigns carried out by municipalities and by the Department to investigate dry weather flows, or need to be calculated from continuous measurements performed for sewers operation. In both cases, the available information is very local and describes flow-rate only over a relatively small area, without directly providing information on a larger scale. This work consists therefore in collecting all the available flow-rate data (about 300 measurement points) and, through extrapolation, to provide the most comprehensive estimate of heat recovery potential possible. The result of this work comes out as a cartographic tool that allows the Seine-Saint-Denis to respond quickly to planners' requests with various information, both on the flow rates and estimated recoverable waste heat and on the reliability of the available data. (authors)
[en] After having indicated an assessment of heat losses in city buildings (in domestic equipment, in waste water, in data processing installations, in meeting rooms, in sport rooms), of possible savings by heat recovery, of existing heat recovery technologies, this publication describes how to produce heat or cold in a decentralised way (moderate-temperature water loops), the contribution of this loop to energy transition objectives defined by public policies (role of the water loop, preferential uses of the water loop in buildings and districts, economic and environmental benefits of the heat pump on moderate-temperature water loop), how to support the development of the sector (identification of levers and brakes to the development of heat pumps on moderate-temperature water loop). Recommendations are then stated: to strengthen analyses of heat recovery, to make planning and public order actors aware of technologies of decentralised production of heat or cold, and to extend the Heat Fund. The eco-district approach is discussed in 4 dimensions and 20 commitments.
[fr]Alors que la France doit doubler sa part d'energies renouvelables et de recuperation d'ici 2030 pour atteindre 32 pc de la consommation d'energie, l'Institut National de l'Economie Circulaire et France Energie revelent les resultats d'une etude inedite sur le potentiel de recuperation de la chaleur en ville et les manieres de mieux l'exploiter. Principales conclusions de l'etude: 1. En ville, les activites humaines generent de la chaleur perdue, dont l'Institut National de l'Economie Circulaire et France Energie proposent une premiere evaluation quantitative inedite: 1,3 MWh/an de chaleur perdue par l'electromenager (seche-linge...) d'un menage de 3 personnes; 1,2 MWh/an de chaleur perdue dans les eaux usees d'un menage de 3 personnes; De 25 a 75 kWh / an de chaleur perdue par les installations informatiques d'une PME; 0,5 MWh / an de chaleur perdue dans une salle de reunion occupee 200h / an; 0,1 MWh / an de chaleur perdue dans les salles de sport pour chaque sportif; un foyer francais consomme en moyenne 14,7 MWh / an. Voir infographie plus bas. 2. En l'etat actuel des technologies et du marche, la recuperation de chaleur en ville permettrait de diminuer de 20 pc la consommation de chaleur / froid des batiments collectifs, pour contribuer aux objectifs de la transition energetique et notamment a la Renovation Wave Strategy publiee par la Commission Europeenne le 14 octobre 2020. Exemples d'equivalences sur le territoire du Grand Paris: dans les immeubles tertiaires du Grand Paris: 3,4 TWh / an recuperables en l'etat actuel de la technologie, soit la consommation de la metropole de Nimes (250 000 habitants); dans les logements collectifs du Grand Paris: 1 TWh/an recuperable en l'etat actuel de la technologie, soit la consommation de la ville de Colmar (70 000 habitants). 3. Les technologies pour recuperer cette chaleur perdue existent et sont francaises. Par exemple: Qarnot Computing decentralise les supercalculateurs informatiques pour utiliser leur chaleur comme source de chauffage dans les batiments. A Bordeaux, Qarnot chauffe, grace a 350 radiateurs-ordinateurs, 6000 m2 de logements sociaux et de bureaux. France Energie recupere la chaleur en exces des batiments (facade ensoleillee, cuisine, eaux usees...) pour la rediffuser dans les pieces qui en ont besoin grace a des pompes a chaleur sur boucle d'eau. Cette technologie permet par exemple de reduire de 40 pc la consommation d'energie de la Banque de France (Paris) ou de la Tour TF1 (Boulogne). 4. Pour accelerer le developpement de la recuperation de chaleur en ville, l'Institut National de l'Economie Circulaire et France Energie recommandent aux pouvoirs publics de: Developper une meilleure connaissance du potentiel de la recuperation de chaleur decentralisee en ville et de ses technologies via la realisation d'etudes quantitatives; Encourager la recuperation de chaleur decentralisee dans la commande publique pour la renovation energetique des batiments publics; Faire beneficier du Fonds Chaleur de l'ADEME la recuperation de chaleur decentralisee.
[en] The start-up Datafarm proposes an energy solution for low-carbon digital technology. Within a circular economy system, it powers data centers with energy produced through methanization, by installing them directly on cattle farms.
[fr]La start-up Datafarm propose une solution energetique pour un numerique bas carbone. Dans un systeme d'economie circulaire, elle alimente ses data centers avec de l'energie methanisee, en les installant directement au sein des exploitations agricoles bovines.
[en] If Waste Water Treatment Plants are especially well performing about the quality of treated water, it has to be noted that the water industry use approximately 3.5% of UE electricity consumption for pumping, water treatment and waste management. The challenge is to move towards energy self-sufficiency, cut carbon and exploit all the opportunities for customer-controlled energy. Anaerobic Digestion and Gas Network Injection technology is advancing rapidly, with gas cleaning systems already generating 144 GWh HHV/year (Feedback Gaz reseau distribution France GRDF), with a total potential assessed at more than 1,500 GWh HHV/y. Renewable energy from biogas will help drive the industry towards genuine carbon neutrality and energy self-sufficiency. This article presents the case study of the new injection plant at Angers Loire Metropolis. It has been injecting the bio-methane issued from the AD into the natural gas network since June 2017. Around 15,000 MWh HHV per year are already injected and this capacity will be soon increased by optimising the process to heat the digester. This production has to be compared to the consumption annual electricity: around 9,000 MWh/year. Depending on the conversion coefficient used, 2.58 in France under the RT 2012, the self sufficiency will soon be 77.6%. One step further is needed to be really self sufficient. As treatment processes may be further optimised thanks R and D, the opportunity for greater energy self sufficiency and renewable energy export will rise. This would be further increased if any spare capacity could be used for the co-digestion of energy crops or other liquid organic wastes depending on regulation rules under discussion. (authors)
Energy efficiency as a response to the economic crisis - Energy efficiency at the heart of industrial recovery? Each application has its solution. Sodeleg valorises its smoke releases in its process. Daudruy feeds the Dunkirk heat network. Arts Energy saves precious kilowatt-hours. A third of electricity saved in ten years in a AkzoNobel factory. Inveest: a training to fund energy efficiency
[en] After the Covid-19 crisis which resulted in an economic crisis, notably in the industrial sector, this set articles highlights efforts made by this sector in order to optimise energy efficiency, as wells as actions which are still to be undertaken. Among them and as discussed in an article, the valorisation of waste heat requires preliminary studies to define the most technically and economically relevant solution. Various solutions are overviewed which depend on the industrial application (heat recovery and valorisation in a process, or heat network supply). Within this context, the ISO 50001 certification and its continuous improvement are key issues for industrials who want to improve their actions. An article however outlines that the high level of necessary investments could be a break for development. Thus, an article outlines the need to train all actors of the investment chain about the stakes of energy efficiency (example of the Inveest programme)
Renewable heat: The reasoning of project holders, notably communities, is not based on the sole economic equation any longer; Kimberly-Clark, to tackle lost heat; Dunkirk: The heat network supplied by the CVE via an energetic hub; In Ciel, 12 farms associated within a methanisation project; methanisation in continuous dry process; The challenge of Gazteam Energie; Solar thermal better supported by the Heat Fund; AAP solar thermal, always larger installations; Long-term leasing to compress prices; The Terra Lumina home and its solar loop
[en] After an interview which discusses the favourable assessment of the Heat Fund operation in 2019 (evolution of numbers of projects, of new installations, of renewable and recoverable energy production), an article comments actions and investments undertaken by the Kimberly-Clark plant in Villey-Saint-Etienne to reduce its environmental impact, notably through the recovery of the unavoidable heat in its atmospheric releases. The next article presents an innovating platform designed as an outlet for the heat of an energetic valorisation centre, and as a supply of the heat network of the urban community of Dunkirk. A methanisation project involving 12 farms in Saone-et-Loire is presented, and then the development by Gazteam Energie of a methanisation unit based on the continuous dry process. Then, in order to illustrate the development of the solar thermal sector, an article outlines the better support awarded to this sector by the Heat Fund, and another one outlines that a call for projects in 2019 concerned large thermal installations. The practice of long-term leasing of solar thermal installations by Eklo Invest in the Oleron island is then commented, and the example of a solar thermal installation for domestic water heating in a social housing building in Marseille is presented
[en] The Siarce ('Syndicat intercommunal d'amenagement, de rivieres et du cycle de l'eau') is a mixed union in charge of public services for water supply, sanitation and river management, serving about 300,000 inhabitants in 69 municipalities of south parisian region. Based on the natural habitat and the technical facilities it manages, Siarce is developing its capacity to produce renewable energy. For example, it has carried out a solution capturing the heat produced in wastewater to heat and cool its headquarters offices, it plans to produce bio-methane from a 346,000 HE (habitant equivalent) wastewater treatment plant and re-inject it into the public grid, to recover the heat from the treated effluent, which is equivalent to the need for more than 5,000 dwellings, it is developing a prototype of a waterside hydroelectric turbine, and wants to enhance his properties by installing photovoltaic solar production. The mixed union organizes these various actions by leading a master plan which will give rise to dialogue with the members. This article is a sharing of experience that provides numerical data on current projects or realizations. (authors)
[en] This publication proposes an assessment of variation ranges of the average complete cost of production of a MWh (also called Levelized Cost of Energy or LCOE) for renewable sectors producing electric power and/or heat, but also for sectors related to electricity storage and to bio-methane injection. For each sector, the main objective was to calculate LCOE variation ranges for an installation put into service in France in 2018, in 2030 or in 2050. For some sectors, the study also tracked LCOE evolutions between 2008 and 2018, and compared the LCOE in France in 2018 with that of some other countries (when data were available). Sectors are herein associated with the energy source: photovoltaic (residential, middle sized roofs, large roofs, ground-based plants), wind (onshore, offshore), hydroelectricity, domestic heat (wood, thermal solar, domestic heat pumps), collective industrial or agricultural heat (thermal solar, biomass, surface geothermal, deep geothermal, fatal heat recovery), biogas (co-generation, injection), and storage (batteries, hydrogen). After a synthesis of results, the report presents the adopted methodology, assessments of electric power production costs for the different sectors, assessments of heat domestic production costs, assessments of collective and industrial heat production costs, the case of biogas and of electricity storage, and an assessment of production costs of solar technologies in non interconnected areas
[en] After a recall of the definition and principle of operation of the CEEs (Certificate of Energy Saving) and of the concerned actions of energy saving, a brief indication of the extension in time of a fourth period for this certificate, and a discussion of its perpetuation and evolution, this publication comments the content of the different standard sheets, notably those which concern heat and cold networks. These sheets address various aspects: network insulation (for the primary and secondary networks), the optimisation of adjustments and consumptions (for the primary and secondary networks), temperature management (for the primary and secondary networks), the connection to a heat network, heat recovery. Possible evolutions and possible new sheets are evoked. Several appendices are provided which give actual examples of these sheets
[en] The French heat pump association (Association Francaise pour la Pompe a Chaleur - AFPAC) and the National institute of circular economy (Institut National de l'Economie Circulaire - INEC) join together to do a research about heat pumps and circular economy. This paper makes an assessment of the french sector and focuses on both heat pump systems and the contribution from the entire sector to environmental public policies objectives. The supply evolution of the sector, particularly for the residential market, is presented. This evolution might respond to several issues: the sector growth and the improvement of heat pumps life cycle.