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1 воздействие производства энергии на окружающую среду
воздействие производства энергии на окружающую среду
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
environmental impact of energy
Energy and environmental problems are closely related, since it is nearly impossible to produce, transport, or consume energy without significant environmental impact. The environmental problems directly related to energy production and consumption include air pollution, water pollution, thermal pollution, and solid waste disposal. The emission of air pollutants from fossil fuel combustion is the major cause of urban air pollution. Diverse water pollution problems are associated with energy usage. One major problem is oil spills. In all petroleum-handling operations, there is a finite probability of spilling oil either on the earth or in a body of water. Coal mining can also pollute water. Changes in groundwater flow produced by mining operations often bring otherwise unpolluted waters into contact with certain mineral materials which are leached from the soil and produce an acid mine drainage. Solid waste is also a by-product of some forms of energy usage. Coal mining requires the removal of large quantities of earth as well as coal. In general, environmental problems increase with energy use and this combined with the limited energy resource base is the crux of the energy crisis. An energy impact assessment should compare these costs with the benefits to be derived from energy use. (Source: RAU)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
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Русско-немецкий словарь нормативно-технической терминологии > воздействие производства энергии на окружающую среду
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2 гора
гора
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
mountain
A feature of the earth's surface that rises high above the base and has generally steep slopes and a relatively small summit area. Mountains are an important source of water, energy, minerals, forest and agricultural products, and recreation. They are storehouses of biological diversity and endangered species and an essential part of the global ecosystem. About 10% of the world's population depend on mountain resources and nearly half of these people are affected by the degradation of mountain watershed areas. (Source: MGH / WRIGHT)
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Русско-немецкий словарь нормативно-технической терминологии > гора
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3 длительный допустимый ток
- Strombelastbarkeit, f
- Dauerstrombelastbarkeit, f
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Русско-немецкий словарь нормативно-технической терминологии > длительный допустимый ток
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4 микропримесь
микропримесь
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
trace material
1) Both metals and non-metals, essential for the metabolic processes of algae, invertebrates and vertebrates. Organisms that derive nearly all their energy via photosynthesis are especially dependent upon dissolved trace substances. 2) Impurities that are present at small but detectable levels. (Source: NATURE / GEMAIR)
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Русско-немецкий словарь нормативно-технической терминологии > микропримесь
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5 неотпускание
неотпускание
Максимальное или близкое к максимальному мышечное сокращение, вызванное электрическим воздействием.
Примечание - Длительность неотпускания при повторяющемся электрическом воздействии может быть меньше, чем при единичном воздействии.
[ ГОСТ Р МЭК 60050-195-2005]EN
(electrical) tetanization
maximal or nearly maximal muscular contraction caused by electrical stimulation
NOTE – A continuous tetanization may be produced by electric stimuli repeated at intervals shorter than the duration of the tetanization produced by a single stimulus.
Source: 891-01-12
[IEV number 195-03-02]FR
tétanisation (électrique)
contraction musculaire maximale ou proche du maximum provoquée par stimulation électrique
NOTE – Une tétanisation soutenue peut être provoquée par des stimuli électriques répétés à des intervalles inférieurs à la durée de la tétanisation produite par un seul stimulus
Source: 891-01-12
[IEV number 195-03-02]Тематики
Синонимы
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Русско-немецкий словарь нормативно-технической терминологии > неотпускание
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6 опреснительная установка
опреснительная установка
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
desalination plant
1) Plants for the extraction of fresh water from saltwater by the removal of salts, usually by distilling.
2) Parts of the world with severe water shortages are looking to desalination plants to solve their problems. Desalination of water is still nearly four times more expensive than obtaining water from conventional sources. However technology is improving and costs are likely to decrease slightly in the future. There is now more interest in building distillation plants beside electric installations so that the waste heat from power generation can be used to drive the desalination process.
(Source: ALL / WRIGHT)
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Русско-немецкий словарь нормативно-технической терминологии > опреснительная установка
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7 органический азот
органический азот
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
organic nitrogen
Essential nutrient of the food supply of plants and the diets of animals. Animals obtain it in nitrogen-containing compounds, particularly aminoacids. Although the atmosphere is nearly 80% gaseous nitrogen, very few organisms have the ability to use it in this form. The higher plants normally obtain it from the soil after microorganisms have converted the nitrogen into ammonia or nitrates, which they can then absorb. This conversion of nitrogen, known as nitrogen fixation, is essential for the formation of amino acids which, in turn, are the building blocks of proteins. (Source: WRIGHT)
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Русско-немецкий словарь нормативно-технической терминологии > органический азот
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8 пастбищные угодья
пастбищные угодья
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
grassland
Grassland cover nearly one-fifth of the Earth's land surface. They include savannah, the prairies of North America, and the steppes of Russia and Central Asia. Grassland ecosystems support thousands of different species, above and below the ground, and have a vital part to play maintaining the ecological balance of the world. (Source: WRIGHT)
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Русско-немецкий словарь нормативно-технической терминологии > пастбищные угодья
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9 песчаная отмель
песчаная отмель
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
sand flat
A sandy tidal flat barren of vegetation. A tidal flat is an extensive, nearly horizontal, marshy or barren tract of land that is alternately covered and uncovered by the tide, and consisting of unconsolidated sediment (mostly mud and sand). It may form the top surface of a deltaic deposit. (Source: BJGEO)
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Русско-немецкий словарь нормативно-технической терминологии > песчаная отмель
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10 Северный Ледовитый океан
Северный Ледовитый океан
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
Arctic Ocean
The smallest and most poorly studied of the oceans on earth. It covers an area of 14 million square km that is divided by three submarine ridges, i.e. the Alpha Ridge, the Lomonosov Ridge, and an extension of the mid-Atlantic ridge. It is also nearly landlocked, covered year-round by pack ice, and the third of its area is continental shelf. (Source: OCEAN)
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Русско-немецкий словарь нормативно-технической терминологии > Северный Ледовитый океан
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11 хвойные
хвойные
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
conifer
An order of conebearing plants which includes nearly all the present day Gymnospermae. Most are tall evergreen trees with needle-like (e.g., pines), linear (e.g. firs) or scale-like (e.g., cedars) leaves. They are characteristic of temperate zones and the main forest trees of colder regions. They provide timber, resins, tars, turpentine and pulp for paper. (Source: ALL)
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Русско-немецкий словарь нормативно-технической терминологии > хвойные
См. также в других словарях:
nearly — nearly, almost, approximately, well nigh are comparable when they mean within a little of being, becoming, reaching, or sufficing. Their differences in meaning are often imperceptible. However, nearly is suitable when mere proximity is implied… … New Dictionary of Synonyms
nearly — [nir′lē] adv. 1. almost; not quite; all but [nearly finished] 2. Now Rare closely; intimately [to be nearly related] 3. Archaic parsimoniously; stingily not nearly not at all; far from … English World dictionary
nearly — ► ADVERB ▪ very close to; almost. ● not nearly Cf. ↑not nearly … English terms dictionary
Nearly — Near ly, adv. In a near manner; not remotely; closely; intimately; almost; as, he nearly lost his life in the accident. [1913 Webster] … The Collaborative International Dictionary of English
nearly — index almost Burton s Legal Thesaurus. William C. Burton. 2006 … Law dictionary
nearly — (adv.) 1530s, carefully; sense of almost, all but is from 1680s; see NEAR (Cf. near) + LY (Cf. ly) (2) … Etymology dictionary
nearly — [adv] almost about, all but*, approaching, approximately, as good as*, circa*, close but no cigar*, closely, give or take a little*, in effect, in essence, in substance, in the ballpark*, in the neighborhood*, just about, more or less, most, much … New thesaurus
nearly — [[t]nɪ͟ə(r)li[/t]] ♦♦ 1) ADV GRADED: ADV group, ADV before v Nearly is used to indicate that something is not quite the case, or not completely the case. Goldsworth stared at me in silence for nearly twenty seconds... Hunter knew nearly all of… … English dictionary
nearly — near|ly [ nırli ] adverb *** 1. ) almost or near to a particular amount of time, money, people, or things: It took nearly six hours to download this software. They ve spent nearly four million dollars. Nearly 1,600 people were evacuated. nearly… … Usage of the words and phrases in modern English
nearly — adverb 1 especially BrE almost, but not quite or not completely: It took nearly two hours to get here. | Michelle s nearly twenty. | Is the job nearly finished? | He s nearly always right. | Louise is nearly as tall as her mother. | very nearly:… … Longman dictionary of contemporary English
nearly — near|ly W1S1 [ˈnıəli US ˈnırli] adv 1.) especially BrE almost, but not quite or not completely = ↑almost ▪ It took nearly two hours to get here. ▪ Michelle s nearly twenty. ▪ Is the job nearly finished? ▪ Louise is nearly as tall as her mother. ▪ … Dictionary of contemporary English