Saturday 22 December 2018

Germany's Green Transition

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Quoting from here.


To fulfill the German target of getting 60% of their total energy consumption from renewables by 2050, they must multiply the current power production from solar and wind by a factor of 15. They must also expand their output from conventional power plants by an equal amount, to balance and backup the intermittent renewable energy. Germany might import some of this balancing power, but even then the scale of this endeavor is enormous. 
Perhaps more important, the amount of land, concrete, steel, copper, rare earth metals, lithium, cadmium, hydrocarbon-based composites and other raw materials required to do this is astronomical. None of those materials is renewable, and none can be extracted, processed and manufactured into wind, solar or fossil power plants without fossil fuels. This is simply not sustainable or ecological. 
Construction of solar and wind “farms” has already caused massive devastation to Germany’s wildlife habitats, farmlands, ancient forests and historic villages. Even today, the northern part of Germany looks like a single enormous wind farm. Multiplying today’s wind power capacity by a factor 10 or 15 means a 200 meter high (650 foot tall) turbine must be installed every 1.5 km (every mile) across the entire country, within cities, on land, on mountains and in water. 
In reality, it is virtually impossible to increase production by a factor of 15, as promised by the plans. 
The cost of Germany’s “Energiewende” (energy transition) is enormous: some 200 billion euros by 2015 – and yet with minimal reduction in CO2 emission. In fact, coal consumption and CO2 emissions have been stable or risen slightly the last seven to ten years. In the absence of a miracle, Germany will not be able to fulfill its self-imposed climate commitments, not by 2020, nor by 2030. 
What applies to Germany also applies to other countries that now produce their electricity primarily with fossil or nuclear power plants. To reach development comparable to Germany’s, such countries will be able to replace only about one quarter of their fossil and nuclear power, because these power plants must remain in operation to ensure frequency regulation, balance and back-up power. 
Back-up power plants will have to run idle (on “spinning reserve”) during periods of high output of renewable energy, while still consuming fuel almost like during normal operation. They always have to be able to step up to full power, because over the next few hours or days solar or wind power might fail. So they power up and down many times per day and week. 
The prospects for reductions in CO2 emissions are thus nearly non-existent! Indeed, the backup coal or gas plants must operate so inefficiently in this up-and-down mode that they often consume more fuel and emit more (plant-fertilizing) carbon dioxide than if they were simply operating at full power all the time, and there were no wind or solar installations.

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