Consumption of electric energy is measured by W·h (Watt x Hour):^). 1 W·h = 3600 joule = 859.8 calorie energy in one year. Electric/Electronics devices consume electric energy to generate desired output(i.e. light, heat, kinetic etc.), while its operation some part of energy are consumed in unintended output. see Electrical efficiency In 2008, world total of electricity production and consumption was 20,279TWh. This number corresponds to a consumed power of around 2.3 TW on average. The total energy needed for producing this power is roughly a factor 2 to 3 higher because the efficiency of power plants is roughly 30-50%, see Electricity generation. The generated power is thus in the order of 5 TW. This is approximately a third of the total energy consumption of 15 TW, see World energy consumption. In 2005, the primary energy used to generate electricity was 41.60 Quadrillion BTU (Coal 21.01 quads, Natural Gas 6.69 quads, Petroleum 1.32 quads, Nuclear electric power 8.13 quads, Renewable energy 4.23 quads respectively). The gross generation of electricity in that year was 14.50 Quads; the difference, 27.10 Quads, was conversion losses. Among all electricity, 4.84 Quads was used in residential area, 4.32 Quads used in commercial, 3.47 Quads used in industrial and 0.03 Quads used in transportation. 16816TWh(83%) of electric energy was consumed by final users. The difference of 3464TWh(17%)was consumed in the process of generating power and consumed as transmission loss and all most consumed at misuse.
Posted on: Sat, 19 Oct 2013 02:47:55 +0000
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