Green energy: sustainable electricity supply with low by Eric Jeffs

By Eric Jeffs

Defines the way forward for the world's electrical energy offer method, exploring the foremost matters linked to international warming, and which strength platforms are most fitted to decreasing it. --from writer description

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So there are a number of applications of existing technology which if applied, not everywhere, but in a sufficient number of places, could achieve a significant reduction in electricity demand or of fuel consumption. The generation of electricity more efficiently is only one part of the equation. The other is the efficiency of transmission. Losses in transmission have increased as voltages have increased and applications of electricity have diversified. Synchronous or reactive compensation systems can improve the situation on long lightly loaded lines, outside of peak times.

But the other issue of green technology is the energy use in setting it up. because it requires large numbers of low output devices. 7 MW, in offshore wind farms around the coast to supply every home in the country with electricity from renewable power sources by 2020 is highly dubious, given the logistics involved of building the components and assembling them out at sea at the rate of two units a day and then connecting them up to the grid. Wind farms have no greenhouse gas emissions but there is an lot of steel in 7000 units which accounts for a huge expenditure of energy to produce the materials, assemble the components and install them out at sea.

Yet every signatory to the Kyoto Protocol has set targets for up to 10% of electricity to be supplied by renewables by 2010 and have little or no chance of meeting it. For a wind farm with 30 generators to match the 90% availability of a thermal power plant would require 27 of them to be running 365 days a year at their maximum continuous rating, which is something of which no wind turbine has yet been shown to be capable. This is the fallacy of the Green argument for renewables and better insulation to supply all our energy needs.

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