79579

SOURCES OF POWER

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Иностранные языки, филология и лингвистика

SOURCES OF POWER The industril progress of mnkind is bsed on power: power for industril plnts mchines heting nd lighting systems trnsport communiction. In fct one cn hrdly find sphere where power is not required. t present most of the power required is obtined minly from two sources. The second wy of producing electricity is by mens of genertors tht get their power from stem or wter turbines.

Английский

2015-02-13

28.42 KB

1 чел.

6. SOURCES OF POWER

The industrial progress of mankind is based on power: power for industrial plants, machines, heating and lighting systems, transport, communication. In fact, one can hardly find a sphere where power is not required.

At present most of the power required is obtained mainly from two sources. One is from the burning of fossil fuels, i. e. coal, natural gas and oil. The second way of producing electricity is by means of generators that get their power from steam or water turbines. Electricity so produced then flows through transmission lines to houses, industrial plants, enterprises, etc.

It should be noted, however, that the generation of electricity by these conventional processes is highly uneconomic. Actually, only about 40 per cent of heat in the fuel is converted into electricity. Besides, the world resources of fossil fuels are not ever-lasting. On the other hand, the power produced by hydroelectric plants, even if increased many times, will be able to provide for only a small fraction of the power required in the near future. Therefore much effort and thought is being given to other means of generating electricity.

One is the energy of hot water. Not long ago we began utilizing hot underground water for heating and hot water supply, and in some cases, for the generation of electricity.

Another promising field for the production of electric power is the use of ocean tides. Our engineers are engaged in designing tidal power stations of various capacities. The first station utilizing this principle began operating in Russia on the Barents Sea in 1968.

The energy of the sun which is being used in various ways represents a practically unlimited source.

Using atomic fuel for the production of electricity is highly promising. It is a well-known fact, that one pound of uranium contains as much energy as three million pounds of coal, so cheap power can be provided wherever it is required. However, the efficiency reached in generating power from atomic fuel is not high, namely 40 per cent.

No wonder, therefore, that scientists all over the world are doing their  best to find more efficient ways of generating electricity directly the fuel. They already succeeded in developing some processes which are much more efficient, as high as 80 per cent, and in creating a number of devices capable of giving a higher efficiency. Scientists are hard work trying to solve these and many other problems.


 

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