How green is my valley?

Hier is enkele uittreksels van ‘n artikel hier: Netright Daily

Die argument is dat windkrag nie groen is nie en net met belastinggeld aan die gang gehou kan word.

Land. 

 Wind turbine installations impact vast amounts of land, far more than traditional power plants.

Arizona’s Palo Verde nuclear plant generates 3,750 megwatts of electricity from a 4,000-acre site.

The 600-MW John Turk ultra-supercritical coal-fired power plant in Arkansas covers part of 2,900 acres; two 600-MW coal-fired units in India use just 600 acres.

Gas-fired units like Calpine’s 560-MW Fox Energy Center in Wisconsin require several hundred acres. All generate reliable power 90-95 percent of the year.

By contrast, the 600-MW Fowler Ridge wind installation (355 turbines) spans 50,000 acres of farm country along Indiana’s I-65 corridor. The 782-MW Roscoe project in Texas (627 turbines) sprawls across 100,000 acres.

Oregon’s Shepherds Flat project (338 gigantic 2.5 MW turbines) covers nearly 80,000 wildlife and scenic acres along the Columbia River Gorge, for a “rated capacity” of 845 MW.

To replace just 20 percent of the United States’ 995,000 MW of total installed generating capacity, we would need to blanket an area the size of Kansas with wind turbines, and then add nearly a thousand 600-MW gas-fired backup generators … and thousands of miles of new high voltage transmission lines.

Raw materials. 

Wind turbine installations require vast amounts of steel, copper, rare earth metals, fiberglass, concrete, rebar and other materials for the turbines, towers and bases.

A single 1.7 MW wind turbine, like 315 of the Fowler Ridge units, involves some 365 tons of materials for the turbine assembly and tower, plus nearly 1100 tons of concrete and rebar for the foundation.

Bigger units require substantially more materials. Grand total for the entire Fowler wind installation: some 515,000 tons; for Roscoe, 752,000 tons; for Shepherds Flat, 575,000 tons; for Chokecherry, perhaps 2,000,000 tons. Offshore installations need far more raw materials.

To all that must be added millions of tons of steel, copper, concrete and rebar for thousands of miles of transmission lines — and still more for mostly gas-fired generators to back up every megawatt of wind power and generate electricity the 17 hours of each average day that the wind doesn’t blow.

Money. 

Taxpayers and consumers must provide perpetual subsidies to prop up wind projects, which cannot survive without steady infusions of cash via feed-in tariffs, tax breaks and direct payments.

Transmission lines cost $1.0 million to $2.5 million per mile. Landowners get $5,000+ per turbine, plus royalties on all energy produced from the turbine, plus payments for every foot of access road and transmission lines.

However, taxpayers pay more, while the landowners’ neighbors suffer property devaluation, scenic disruption, noise, health problems and interference with crop spraying, but no monetary compensation.

Direct federal wind energy subsidies to help cover this totaled $5 billion in FY 2010; state support added billions more; still more billions were added to consumers’ electric bills.

The Other People’s Money well is running dry. The “manmade catastrophic climate change” thesis behind the wind energy campaign is in shambles.

Voters and consumers are understandably fed up.

Read more at NetRightDaily.com: http://netrightdaily.com/2011/09/our-least-sustainable-energy-option/#ixzz1XMaqI95o

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3 Comments

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3 responses to “How green is my valley?

  1. HeavyHenry

    Waarsie nukes?Nice pos!

  2. TS

    Ek verstaan van die tegniese goed niks maar in my brein verstaan ek nie hoekom die mense nie natuurkragte met vrug kan aanwend nie?

  3. vuurklip

    Eenvoudig: Die energie-digtheid van natuurkragte soos wind en son is veel laer as die van fossielbrandstowwe. Daar is bv ontsaglik baie energie in die atmosfeer agv wind, maar om daardie energie te oes moet jy duisende wind tubines plaas. En dan kom jy net die energie wat naby die grond is by. Die energie in die kilometers bo wind tubines is onbereikbaar. So ook is daar meer energie as wat ons ooit kan gebruik net in golwe in die see. Dink aan die onmeetlike tonne water war deur golwe op-en-af beweeg word. Maar om dit te oes, verg net soveel “waterpompe” as windmeulens. ‘n Onhaalbare droom.

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