369 Introduction
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IRAN STATISTICAL YEARBOOK 1390 8. WATER AND ELECTRICITY Introduction drinking, industry, irrigation (agriculture), electricity he statistics appeared in this chapter have generation and control of flood. Reservoir dam: a dam made for reserving, managing been provided as register records by the or controlling the flow of water to reserve it for Ministry of Energy on two topicsof "water" procuring water for irrigation, drinking, industry, and "electricity". T electricity generation and control of flood 1. Water Large reservoir dam: refers to all dams with a Thissection includes information on "underground height of 15 metres or more as well as 10 to 15 waters", "reservoir dams", and "length of networks and metres high dams having a reservoir with a number of water and sewage extensions". The related volume of 1 million cubic metres or more and/or a statistics have been added to the Statistical Yearbook capacity of flood discharge of 2000 or more cubic of Iran since the year 1346. Statistics on underground waters and reservoir dams metres per second. Inflow: annual volume of water entered the reservoir have been provided by Water Resources Management of a dam through the river. Company and statistics on the length of networks and Outflow: total annual volume of water discharged number of water and sewage extensions has been from different outlets of a dam (weir, silt ejector obtained from the Water and Sewage Engineering channels, take-out gates, drainage channels) and Company. evaporation. Central and Internal basin, Hamun basin, and Sarakhs Water extension: refers to the part of branched-off basin were renamed by Water Resources Management water pipes, containing pipe, related accessories, with Organization as Central Plateau, Eastern Border and a profile appropriate to the water metre and the Qareh Qum respectively, in the year 1383. extension capacity of public water, which connects a 2. Electricity private water distribution line or public water Data related to electric power industry was first distribution network from installation place of the collected in the year 1343 by the then Ministry of extension valve to the delivery point (valve following Water and Power (renamed the Ministry of Energy in the watermetre). 1353). Since the year 1346, the Ministry has regularly Public water distribution network: a collection of provided the annual statistics on the power interconnected pipe lines with needed pressure for industrycomprising power generation, transmission, distributing water for household, office and industrial distribution, and consumption. The statistics, a part of consumption in a region or inside the city , all of which appears in some tables of this yearbook, are which belong to the Water and Sewage Company. presented in various annual publications released by Sewage extension: refers to the part of minor sewage the Ministry. Moreover, through two successive censuses of pipelines, including pipes and related accessories, with a profile appropriate to siphon or contractual capacity, population and housing in the years 1365 and 1375, which carries joint sewages away from the siphon to the SCI collected data on residential units and the private line or to the public network for collecting households benefiting from piped water and electricity sewages. which are reflected in Chapter 9, “Construction and Housing,” of the yearbook. Public network for collection and transmission of sewage: refers to all installations and equipment, such as main collectors, used for collection and transmission Definitions and concepts of sewage to water treatment house and pump houses Water basin: see Chapter 1, Definitions and of urban sewage and public side networks, all concepts. belonging to the Water and Sewage Company. The Aquatic year: see Chapter 1, Definitions and concepts. network is not responsible for collection, transmission Water produced: the amount of water gained from and disposal of rainfall water flowing on passages, various (surface and underground) water resources flood channels and channels inside and outside cities such as wells, springs, subterranean canals, dams and located in the customers’ estates. river basins. Nominal capacity (registered nominal power): refers Dam: a structure built against the flow of water to to the maximumexpected output of an electricity reserve water or change the direction of flow or manage it for satisfying different needs such as generator in designing condition defined by the manufacturer. Nominal power is usually installed in KVA or KW for smaller generators on the generator. 369 8. WATER AND ELECTRICITY IRAN STATISTICAL YEARBOOK 1390 Actual capacity or actual power (registered power): Maximum non-coincidental load: the sum of the refers to the maximum amount of electricity that could peak of consumption in different regions of the be generated by a generator while regarding the country during a certain period, which are not environmental conditions (altitude, temperature, and necessarily simultaneous. relative moisture). Power Company: the companies (Ltd.) which are by Maximum coincidental power generated: refers to the law engaged in generation, transmission and sum of electric power generated at the peak of network distribution of electricity or in a part of such activities load during a certain period. The sum of maximum and provide the customers with electricity. The coincidental power generated might be equal or less definition covers the water and power organizations as than the total capacity of the plants. well. Gross generation: refers to the amount of electricity Power plant: refers to the installation place of generated by a generator or a plant during a certain generators and related equipment. period which is measured on output series of the main Hydroelectric power plant: a power plant in which the or supplementary generators and stated in kilowatt potential energy of water accumulated at dams or hour (kWh) or megawatt hour (MWh). flowing energy of rivers water is used to drive the Net generation: refers to the electricity measured at hydroelectric turbine for electricity generation. the point of transmission to the power grid. During a Thermal power plant: a power plant in which certain period, the net generation may be calculated by chemical energy inherent in solid, liquid, gaseous fuels subtracting the gross internal consumption form the is transformed into electricity. This definition covers gross generation in the same period. nuclear, steam, gas, combined-cycle and diesel power Other institutions: the institutions which generate plants. electricity for their own consumption and also sell a Steam power plant: a kind of power plant in part of their production to other institutions but are which thermal energy produced from liquid, solid independent from the Ministry of Energy; some and gas fuels is used for steam production and then examples are, Esfahan Steelworks,Mobarakeh Steel driving the steam turbine to generate electricity. Industries, Petrochemical Industries, Tabriz Tractor Gas power plant: a type of power plant in which hot Industries, and Sarcheshmeh Copper Industries. gas produced from the thermal energy in gas and liquid Interconnected network: the collection of production fuels drives gas turbine to generate electricity. sites and regions of energy consumption around the Combined-cycle power plant: a kind of power plant in country connected together with a network of which, in addition to electric energy in gas turbine, the transmission lines and high voltage stations. The heat in gases off the gas turbine is used for production network lets electricity exchange between the regions of steam using a recycling steam kettle. The steam covered, and makes the export of electric energy produced is transformed into electric energy in a steam possible. turbo generator set. Isolated network (generation and power Diesel power plant: a kind of power plant in which gas consumption): refers to regional, provincial and or liquid is used in cylinders to transform mechanical island networks not connected with adjacent networks energy produced by coupled generator into electric or interconnected network. energy. Load-demand: the power consumed during a certain Internal consumption: refers to the sum of electricity period in a certain part of the network. consumed internally by units and for non-technical Maximum coincidental load: in a full interconnected cases, as well as consumption of lights, etc. in a power electricity system, maximum coincidental load for a plant in a certain period in kilowatt-hour (kWh). day, a week, a month, or a year refers to the sum of Losses: refers to the energy lost in transmission and load at the peak of consumption in regions in megawatt. distribution lines in a network or a certain system. Where the interconnected system does not cover the total Energy lost by transformers is considered as losses of country, the maximum coincidental load may be transmission and distribution. calculated by adding up maximum load of Sale or consumption of electricity: the amount of interconnected network and load of separate regions in electricity sold to the consumers for various megawatt simultaneously. With regard to the consumptions. difference between peak hours of consumption in Energy produced by the fuel (thermal value): the different regions connected to the interconnected amount of heat (kilo calorie or B.T.U.) produced network, maximum coincidental load is less than the sum of through burning of the mass unit of a certain fuel. the