Money Renewables: scenarios of a full supply

15:35  22 july  2021
15:35  22 july  2021 Source:   tagesspiegel.de

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Germany can meet its energy needs soon completely from renewable energy sources, have DIW researchers calculated. Critics believe this is unrealistic.

Energie, die der Wind bringt. Der Ausbau von Windkraftanlagen verläuft in Deutschland zu schleppend. © Photo: Jens Büttner / dpa energy that brings the wind. The expansion of wind power plants in Germany runs too slowly.

whole without fossil fuels, lignite, hard coal, natural gas and nuclear power for energy supply - that's apparently considering. Germany could meet its needs from 100 percent renewable energy when the expansion pace of wind and solar energy is greatly increased , revealed to the German Institute for Economic Research (DIW) in Berlin. That gave the energy economist Claudia Kemfert, head of the DIW Department of Energy, Transport and Environment, said Wednesday. will possible that in ten to 15 years, not only for the current demand, but for the entire energy demand. "100 percent renewable energy is technically feasible and economically efficient," Kemfert said. The scientists calculated scenarios of a full supply based on photovoltaic, wind power on land and at sea, and other renewable energies for the current study.

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No more nuclear power, no coal - where should be the power come from?

The topic is controversial. Because Germany's climate targets must reach to the end of 2022 getting out of nuclear power and no later than 2038, step by step from the coal, it is about the question of where the power is meant to arrive - and whether the renewable energies cover the complete needs.

Video: What a waste of energy! (Dw.com)

According to the DIW study, although the trend would rise strongly for the electrification and thus more power needed. The scientists of more than 1,000 terawatt hours in 2018, the demand was 500 terawatt hours. The total energy consumption is but 1,200 terawatt hours less than half as high as in 2018, when he came in at 2,600 terawatt hours.

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Two scenarios, the researchers have developed: Both are based on a production mix of renewable energy throughout Europe, taking into account electricity, heat and transport. According to the "integrated scenario," the expansion of capacity of generation and storage will connected to the network expansion. It is the second "disintegrated" scenario superior because the energy closer to the consumer: will produce inside and therefore need less battery storage and power lines. What is important here is that the potential for renewable energy in all regions there is. It would been used very unequal, says DIW research director for international infrastructure policy and industrial organization, Christian von Hirschhausen. Total supply was not jeopardized. Then let include calculations for which the researchers faced internal electricity production and consumption in the winter at the time of the lowest feed-in of solar and wind energy. "High levels of fossil natural gas power generation in network development plan for Germany are the shadows of an energy policy of the past," says kemfert.

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We need more windmills

Malte Küper by the Institute of the German Economy (IW) in Cologne sees the study, however, critically: "The DIW has highlighted potential, the actual implementation while maintaining security of supply is, however, very ambitious, especially since only the number of new wind turbines increased in recent years, far too slow, "the IW Speaker declared energy on demand. Also the waiver of non-European imports of hydrogen and synthetic fuels keeps Küper given the required amounts not appropriate, as there is great potential remained unused. The pace of expansion in wind and solar energy, however, must set actually strong.

The fossil power has passed its peak worldwide in the year 2018th This says a study by two NGOs, which was also unveiled on Wednesday. Because solar and wind energy would cost less and less, many developing countries would coal and gas quasi Skip to strengthen their power, declared the British initiative Carbon Tracker and the Indian Institute CEEW. The study is based, the data and forecasts of the International Energy Agency IEA and the OECD. AFP / dpa

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