By A. R. Meetham
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Extra info for Atmospheric Pollution. Its History, Origins and Prevention
In several countries much more fuel oil than formerly is being used for steam raising at power stations, and nuclear energy is also coming into use. The growth of steam turbines and water power in Great Britain is shown in Table 15. The annual output of electric power has been doubling every ten years since 1920 until the peak year of 1973 after which electricity generation has levelled off. This has been in line with the rate of increase in the world as a whole—over 10 per cent per year. TABLE 15.
The annual output of electric power has been doubling every ten years since 1920 until the peak year of 1973 after which electricity generation has levelled off. This has been in line with the rate of increase in the world as a whole—over 10 per cent per year. TABLE 15. Electricity generated in Britain million k Wh\year Steam Hydroelectric 1920 1930 1940 1950 1959 1967 1974 1977 4200 12 10,400 320 27,800 800 53,300 1035 102,900 2175 176,900 16,100 232,400 13,500 242,500 12,500 In mountainous countries, hydroelectric power stations are relatively more important than in Britain.
The calorific value of an oil is the amount of heat given off by unit quantity when it is completely burned. This is normally expressed in joules per kilogram (J«kg_1)—usually as a number of megajoules (MJ) per kilogram (1 MJ = 10° J). 2. Viscosity. The viscosity of any fluid is a measure of its resistance to flow and is defined as the force needed to shear a cube of the fluid of unit dimensions at unit speed. I. units of kinematic viscosity are m 2 s _1 . However, the "Stoke" is more usually used (1 m 2 s _ 1 —10,000 Stokes).
Atmospheric Pollution. Its History, Origins and Prevention by A. R. Meetham