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[en] The invention is applied to a tritium extraction plant of for extraction of a hydrogen isotope for instance in a nuclear reactor on in reprocessing effluents. Heat extracted from vapors during cooling at the outlet of each isotopic exchange step is used for liquid vaporization and gas preheating at each inlet of isotopic exchange step
[fr]L'intervention s'applique a une installation d'extraction et/ou de production de tritium ainsi qu'a l'extraction d'un isotope de l'hydrogene. Ce procede est caracterise en ce qu'on recupere la chaleur extraite des phases vapeur et gazeuse lors du refroidissement a la sortie de chaque etage d'echange isotopique et en ce qu'on utilise la chaleur ainsi recuperee pour contribuer a la vaporisation du liquide et au prechauffage du gaz a l'entree d'un etage d'echange isotopique
[en] For three sites located in Burundi, Madagascar and Rwanda which have been selected after a previous study, this document reports a feasibility study and the definition of the characteristics of micro geothermal plants which could be installed there. These plants convert thermodynamic energy into mechanical and electric energy, with a recoverable power of 15 kWe. After a description of the operation of such micro-plants (principle, hot water and cold water circuits, exchangers, engine, freon circuit, electric power production, regulation and automatism), and a description of the selected sites (location, physical and chemical characteristics), a pre-sizing is reported (fluid selection, needed water flow rates, components). The report discusses the use of the produced electric power, and reports an assessment of construction costs (site development, plant construction and installation), discusses the exploitation and installation of the plant. Results are globally discussed in terms of thermal and cold water flow rates, of possible electric power, and of chemistry of underground waters. If the operation appears to be technically feasible, the cost appears to be high due to the characteristics of the thermal water temperature
[en] These specifications aim at describing the typical process and content of an assessment study of unavoidable heat potentials which are available within a specific territory, thus allowing deeper and more targeted studies to be performed for the implementation of unavoidable heat recovery projects. This concerns any effluent type, whatever its type (gas, liquid) and origin (industry, waste incineration plants, energetic valorisation units, data-centres, and so on) are. Four main phases are identified and discussed: inventory of unavoidable heat sources, assessment of the local valorisation potential, proposition of a strategy of actions, and study communication.
[en] In France, the situation of cogeneration and heat networks is very different from other european countries, as the electricity supply is independent of the heating supply. 250MW of cogenerated power is currently available from the french heat network. It could be increased to 800MW, if local authorities and companies were to accept the opportunities extended to them, such as the renovation of '50 and '60 boiler plants and the construction and renovation of domestic waste incineration plants. Other than steam turbine systems should be also used: motors and gas turbines
[en] The CEA (in his five-year setting plan) has objective among others, the realization of the two first french reactors moderated with graphite. The construction of the G-1 reactor in Marcoule, first french plutonic core, is achieved so that it will diverge in the beginning of 1956 and reach its full power in the beginning of the second semester of the same year. In this report we will detail the specificities of the reactor and in particular its cooling and energy recuperation system. The G-1 reactor being essentially intended to allow the french technicians to study the behavior of an energy installation supply taking its heat in a nuclear source as early as possible. (M.B.)
[fr]Le Commissariat a l'Energie Atomique (dans le cadre du plan quinquennal) a entre autres objectifs, la realisation des deux premiers reacteurs francais moderes au graphite. La construction du reacteur G-1 a Marcoule, premiere pile plutonigene francaise, est realise afin qu'il puisse diverger au debut de 1956 et atteindre sa pleine puissance au debut du second semestre de la meme annee. Dans ce rapport nous detaillerons les specificites du reacteur et en particulier son systeme de refroidissement et de recuperation d'energie. Le reacteur G-1 etant essentielement destine a permettre aux techniciens francais d'etudier le plus tot possible le comportement d'une installation productrice d'energie empruntant sa chaleur a une source nucleaire. (M.B.)
[en] Methodology of diagnosis for energy audit in existing industrial plants by energy fluxes analysis which gives two types of indications: one with no or small investments, and the other one with important investments. This diagnosis is applied to some processes: liquid solid separation, solution concentration, heat exchangers, buildings (heating, cooling, ventilation, air conditioning). (A.B.). 13 figs. 1 tab
[en] A global thermal approach to sprinkled greenhouse cultivation was developed, which led to monographs which can be used for preliminary studies. As a second step, the thermal behaviour of this particular greenhouse was used to define the relevant parameters for the optimisation of the procedure and the ideal characteristics of the material to be used for the shelter. At the same time, a physical model of a buried tubular heat exchanger was built, together with a flexible and thoroughly tested computer program. An example of its use to help determine the dimensions for ground heating systems is presented. The various waste heat recovery procedures described have been studied, leading to an internal economic study including a comparison with other means of greenhouse heating
[fr]Une approche thermique globale de la serre a ruissellement a ete realisee, aboutissant a la construction d'abaques representatifs et utilisables pour toute etude previsionnelle. Dans un second temps, une modelisation du comportement energetique de cette serre a permis de definir les elements d'optimisation du procede et les caracteristiques ideales des materiaux de couverture de l'abri. Parallelement, un modele physique descriptif d'un echangeur tubulaire enterre a ete developpe, concretise en un programme informatique souple et teste. Un exemple d'application est donne, concernant le dimensionnement des systemes de rechauffage du sol. L'ensemble des procedes de valorisation des rejets thermiques decrits a alors ete repris et a donne lieu a une etude economique interne et comparative avec les autres modes de chauffage des serres
[en] After having indicated how the ADEME, through its aid-to-decision arrangement, financially supports studies with a quality and efficiency objective for the recipient, this document indicates the content and modalities of performance and restitution of studies performed by an intervener external to the recipient of the ADEME's support. Thus, it first indicates the objectives of the specification note and the reasons for a feasibility study in the case of a project of recovery of unavoidable heat for internal/external valorisation. Then, it presents the chronology and details the different phases of the project: phase 1 (situational analysis and scope of the project, technical-economic proposition), phase 2 (additional analysis of the whole site with data recovery, additional measures, energy assessment and deepened analysis, report), phase 3 (feasibility study with collection and consolidation of data describing existing installations, choice and sizing of installations of heat recovery and valorization, energy and environmental assessment, economic and legal arrangement, deliverables). Modalities of execution are then addressed: steering committee, meetings, documents, ownership of results, study provider, delay, mission cost, restitution and confidentiality, control. Appendices address deepened analysis methods, and aspects specific to waste incineration units.
[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] Technically the fission reactors, on service or under construction, can produce other products than the electric power. Meanwhile, these applications are known since the beginning of the reactors exploitation, they never have been developed industrially. This report examines the necessary technical characteristics for using the nuclear systems on non electric power applications with an economical efficiency. What are the markets for these products? What are the strategical challenges to favor the development of non electric power applications of the nuclear energy? (A.L.B.)