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IRAN STATISTICAL YEARBOOK 1393 9. WATER AND ELECTRICITY Introduction Aquatic year: see Chapter 1, Definitions and he statistics appeared in this chapter have concepts. been provided as register records by the Water produced: the amount of water gained from Ministry of Energy on two topics of water" various (surface and underground) water resources T and "electricity". such as wells, springs, subterranean canals, dams and river basins. Water Dam: a structure built against the flow of water to This section includes information on reserve water or change the direction of flow or "underground waters", "reservoir dams", and manage it for satisfying different needs such as "length of networks and number of water and drinking, industry, irrigation (agriculture), sewage extensions". The related statistics have electricity generation and control of flood. been added to the Statistical Yearbook of Iran Reservoir dam: a dam made for reserving, since the year 1346. managing or controlling the flow of water to Statistics on underground waters and reservoir reserve it for procuring water for irrigation, dams have been provided by Water Resources drinking, industry, electricity generation and Management Company and statistics on the length control of flood of networks and number of water and sewage Large reservoir dam: refers to all dams with a extensions has been obtained from the Water and height of 15 metres or more as well as 10 to 15 Sewage Engineering Company. metres high dams having a reservoir with a It is notworthy that Central and Internal basin, volume of 1 million cubic metres or more and/or a Hamun basin, and Sarakhs basin were renamed by capacity of flood discharge of 2000 or more cubic Water Resources Management Organization as metres per second. Central Plateau, Eastern Border and Qareh Qum, Inflow: annual volume of water entered the respectively, in the year 1383. reservoir of a dam through the river. Electricity Outflow: total annual volume of water discharged Data related to electric power industry was first from different outlets of a dam (weir, silt ejector collected in the year 1343 by the then Ministry of channels, take-out gates, drainage channels) and Water and Power (renamed the Ministry of evaporation. Energy in 1353). Since the year 1346, the Water extension: refers to the part of branched- Ministry has regularly provided the annual off water pipes, containing pipe, related statistics on the power industrycomprising power accessories, with a profile appropriate to the water generation, transmission, distribution, and metre and the extension capacity of public water, consumption. The statistics, a part of which which connects a private water distribution line or appears in some tables of this yearbook, are public water distribution network from installation presented in various annual publications released place of the extension valve to the delivery point by the Ministry. (valve following the watermetre). Moreover, through two successive censuses of Public water distribution network: a collection of population and housing in the years 1365 and interconnected pipe lines with needed pressure for 1375, the SCI collected data on residential units distributing water for household, office and and households benefiting from piped water and industrial consumption in a region or inside the electricity which are reflected in Chapter 10, city , all of which belong to the Water and Sewage “Construction and Housing,” of the yearbook. Company. Sewage extension: refers to the part of minor Definitions and concepts sewage pipelines, including pipes and related Water basin: see Chapter 1, Definitions and accessories, with a profile appropriate to siphon or concepts. contractual capacity, which carries joint sewages 359 9. WATER AND ELECTRICITY IRAN STATISTICAL YEARBOOK 1393 away from the siphon to the private line or to the Tractor Industries, and Sarcheshmeh Copper public network for collecting sewages. Industries. Public network for collection and transmission Interconnected network: the collection of of sewage: refers to all installations and equipment, production sites and regions of energy such as main collectors, used for collection and consumption around the country connected transmission of sewage to water treatment house together with a network of transmission lines and and pump houses of urban sewage and public side high voltage stations. The network lets electricity networks, all belonging to the Water and Sewage exchange between the regions covered, and makes Company. The network is not responsible for the export of electric energy possible. collection, transmission and disposal of rainfall Isolated network (generation and power water flowing on passages, flood channels and consumption): refers to regional, provincial and channels inside and outside cities located in the island networks not connected with adjacent customers’ estates. networks or interconnected network. Nominal capacity (registered nominal power): Load-demand: the power consumed during a refers to the maximumexpected output of an certain period in a certain part of the network. electricity generator in designing condition Maximum coincidental load: in a full defined by the manufacturer. Nominal power is interconnected electricity system, maximum usually installed in KVA or KW for smaller coincidental load for a day, a week, a month, or a generators on the generator. year refers to the sum of load at the peak of Actual capacity or actual power (registered consumption in regions in megawatt. Where the power): refers to the maximum amount of interconnected system does not cover the total electricity that could be generated by a generator country, the maximum coincidental load may be while regarding the environmental conditions calculated by adding up maximum load of (altitude, temperature, and relative moisture). interconnected network and load of separate Maximum coincidental power generated: refers regions in megawatt simultaneously. With regard to the sum of electric power generated at the peak to the difference between peak hours of of network load during a certain period. The sum consumption in different regions connected to the of maximum coincidental power generated might interconnected network, maximum coincidental be equal or less than the total capacity of the load is less than the sum of the maximum loads of the plants. regions. Gross generation: refers to the amount of Maximum non-coincidental load: the sum of the electricity generated by a generator or a plant peak of consumption in different regions of the during a certain period which is measured on country during a certain period, which are not output series of the main or supplementary necessarily simultaneous. generators and stated in kilowatt hour (kWh) or Power Company: the companies (Ltd.) which are megawatt hour (MWh). by law engaged in generation, transmission and Net generation: refers to the electricity measured distribution of electricity or in a part of such at the point of transmission to the power grid. activities and provide the customers with During a certain period, the net generation may be electricity. The definition covers the water and calculated by subtracting the gross internal power organizations as well. consumption form the gross generation in the Power plant: refers to the installation place of same period. generators and related equipment. Other institutions: the institutions which generate Hydroelectric power plant: a power plant in electricity for their own consumption and also sell which the potential energy of water accumulated a part of their production to other institutions but at dams or flowing energy of rivers water is used are independent from the Ministry of Energy; to drive the hydroelectric turbine for electricity some examples are, Esfahan teelworks,Mobarakeh generation. Steel Industries, Petrochemical Industries, Tabriz Thermal power plant: a power plant in which chemical energy inherent in solid, liquid, gaseous 360 IRAN STATISTICAL YEARBOOK 1393 9. WATER AND ELECTRICITY fuels is transformed into electricity. This Power transmission line: a line composed of definition covers nuclear, steam, gas, combined- conductors, insulators and other subsidiary cycle and diesel power plants. equipment used for transmission of high amount Steam power plant: a kind of power plant in of electricity, with high voltages in long distances which thermal energy produced from liquid, solid between source points (power plants and receiving and gas fuels is used for steam production and points. then driving the steam turbine to generate Sub-transmission line: a collection electricity. oftransmissionlines with voltages from 63 to 132 Gas power plant: a type of power plant in which kV. hot gas produced from the thermal energy in gas Electricity customers: natural or legal persons and liquid fuels drives gas turbine to generate whose specifications are registered by customers electricity. division according to the regulation of the power Combined-cycle power plant: a kind of power company after submitting the required documents plant in which, in addition to electric energy in and payment of the related costs, and are offered a gas turbine, the heat in gases off the gas turbine is customer number. used for production of steam using a recycling Household uses: electricity used by households to steam kettle. The steam produced is transformed operate common electric appliances and for lights into electric energy in a steam turbo generator set. in residential units. Diesel
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