LYON Research OKAY CONTACT www.dalkia.fr Who are we ? Heat network Environment Customer services News Home | Customer services | Glossary Glossary Discover the meaning of commonly used abbreviations and specific terms specific to district heating networks. Biomass Renewable energy, biomass brings together all the plant material likely to be collected for energy recovery purposes. It includes plants that can be used directly and the residues of a first exploitation of biomass (forest, agricultural by-products, etc.). It contributes to the enhancement of ecosystems and has a neutral CO 2 balance . Energy wood This is the name given to all the applications of wood as a fuel. Wood energy is a type of bioenergy using biomass made up of wood. It can be renewable energy if the wood is produced through sustainable forest management. It comes in four essential forms: logs wood pellets or pellets reconstituted wooden bricks forest chips District heating or district heating It is a collective heating system which supplies, from a heat production plant, a kind of central boiler, housing, public buildings, leisure or health facilities ... The heat produced is transported and distributed by a network of underground pipes. Boiler room The central boiler room produces the energy necessary for the operation of the district heating network. Composed of several boilers, and in some cases coupled with a cogeneration unit, the boiler room guarantees the temperature of the water or steam circulating in the network to the end user. Public Service Delegation In France, the public service delegation (abbreviated as DSP) is the set of contracts by which a legal person governed by public law entrusts the management of a public service for which it is responsible to a public or private delegatee whose remuneration is substantially linked to the operating result of the service. Energy L'énergie est obtenue par l'utilisation de combustibles (pétrole, essence, gazole, fioul, gaz, charbon, etc.), de l'électricité ou de forces naturelles comme le vent ou l'énergie solaire. L'énergie peut donc se présenter sous plusieurs formes qui peuvent se transformer, par exemple, en production d'électricité ou en production de chauffage d'une maison. Sans énergie, on ne se chauffe plus, on ne s'éclaire plus, on ne se transporte plus, on n'a plus de téléphone, d'ordinateurs ou de télévisions. L'énergie se mesure en joules ou plus communément en kW (3,6 millions de joules). Énergies Renouvelables (ENR) These are the energies from elements which renew themselves indefinitely such as water, wind, sun, wood and the warmth of the earth. By definition, fossil fuels are not renewable. Fossil fuels These are energies resulting from the decomposition of animal and plant debris, which under the effect of the pressure in sedimentary layers and in the absence of oxygen, were transformed slowly, over millions of years, to give coal, petroleum or natural gas. FOD Heating oil Gas CO 2: Carbon dioxide SO 2: Sulfur dioxide NOx: The compounds analyzed by the air pollution alert and measurement networks are NO (nitrogen monoxide) and NO 2 (nitrogen dioxide), grouped under the generic term of nitrogen oxides. (NO x ). Greenhouse gas The greenhouse effect is a natural phenomenon essential to life on our planet. Certain gases contained in the atmosphere retain a fraction of the solar heat and allow the maintenance of an average temperature of 15 ° C (without these gases, the temperature would be 18 ° C). The increase in the concentration of these gases, whose _ come from the combustion of fossil fuels, will cause an increase in the average temperature, which could rise from 1.4 to 5.8 ° C by 2100 This warming could have catastrophic consequences: melting sea ice and glaciers, sea level rise of 15 to 95 cm, extreme weather phenomena (droughts, storms, desertification, floods, etc.). MW MegaWatt: Unit of power equal to 1000 Watt. The electric watt (abbreviation: We) corresponds to the production of electric power. Its multiples are the electric megawatt (MWe) and the electric gigawatt (GWe). The thermal watt (abbreviation: Wt or Wth) corresponds to the production of thermal power. Its multiples are the thermal megawatt (MWt or MWth) and the thermal gigawatt (GWt or GWth). This precision is necessary to distinguish the electricity production from the thermal production of a power plant. For example, the Embalse nuclear power plant in Argentina generates 2109 MW of heat (2109 MWth), and only 648 MW of electricity (648 MWe), since the transformation of thermal energy into electrical energy can only be done 'with losses (efficiency of the order of 30 to 40%). Substations The substation is the heat delivery point of the building, where it plays the role of a conventional boiler room, thanks to a heat exchanger. Substations are simpler, safer and much less cumbersome than a boiler room. Tep A unit of comparison, the toe (tonne of oil equivalent) is the quantity of energy obtained in the form of heat by the combustion of a tonne of oil. 1 ton of oil = approximately toe 1 ton of coal = 0.6 toe 1 ton of wood = around 0.3 toe P1, P2, R1 and R2 terms - P1 (energy): optimized energy management (from the purchase of the fuel (s) to the optimization of technical efficiency: production and use). - P2: operation, maintenance and repair of managed installations and minor maintenance work. - R1: The term R1 is a proportional element representing the cost of fuels or other sources of energy deemed necessary, in quantity and quality, to ensure the supply of one MWh intended for space heating or one cubic meter of 'hot water. - R2: The term R2 is a fixed element representing the sum of the following annual costs: the cost of electrical energy used for mechanical purposes to ensure the operation of energy production and distribution facilities; the cost of driving services, minor maintenance services, fixed administrative costs necessary to ensure the operation of the heating network installations; the cost of major maintenance and equipment renewal services; the financing of service works. 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