| Popis: |
If at the end of the nineteenth century the most widespread energy used – the electricity – had an auxiliary and insignificant role in the global energy balance, then in 1930 about 300 billion kWh of electricity were produced in the world, and in 2004 this figure reached 21,000 billion kWh [1]. The material and the spiritual level of mankind are directly dependent on the amount of the available energy. The stringent laws of the nature state that useful energy can be obtained only by converting it from other forms. The World energy structure analysis shows that 4 out of 5 kW are obtained, in principle, using the same method by which the primitive man heated himself, that is by burning fuel, or by using its chemical energy converted into electricity at power plants. Of course, fuel combustion methods have become much more perfect. |
