Saksa on tuonut enemmän ligniittihiiltä ja ydinenergiaa naapurimaistaan sen jälkeen kun Fukushiman ydinonnettomuus pakotti sen aloittamaan vanhenevien ydinreaktorien sulkemisen. Saksa silti vie yhtä sähköenergian lähdettä Ranskaan: aurinkovoimaa.
"Kun keskipäivällä on runsaasti aurinkotuotantoa, silloin jopa Ranska tuo sähköä meiltä," meklari sanoi Reutersille.
Tuo on tavallaan ymmärrettävää sillä vuoden aikana Saksa on nettosähkön myyjä toisin kuin Suomi, joka ostaa prosentuaalisesti saman määrän kuin Saksa myy (eli noin 4 % ja vuodesta riippuen 150-250 kWh asukasta kohti).
Aurinkoenergia-ala työllistää 40000 henkilöä, joten tuosta voisi helposti tulla uusi työpaikka monelle energia-alalla ydinreaktorissa työskenneelle...
Lähde:
Germany has imported more lignite coal and nuclear energy from its neighbours since the Fukushima disaster pushed it to begin closing its ageing nuclear reactors. But it is still exporting one source of electricity to France: solar power.
"When there is a lot of solar production at midday, then even France imports from us," a trader told Reuters.
Germany is one of the world's leading solar photovoltaic (PV) energy producers, with a solar capacity of almost 17GW, 40,000 employees and a 2% electricity market share. In 2010, the country set a world record for installations of solar PV in one year.
But supplies from variables such as wind and solar are intermittent – depending on the elements – and their electricity generation on one day measured in February varied from a high of 32% of supply at midnight, to a low of 18% at sunrise.
Solar PV generated more than 8,000 MW of that amount – 13% of the overall supply – for two hours at midday. But conventional sources such as oil and gas generated some 50,000 MW during the same period.
Despite this, advances in weather forecasting are making variables increasingly attractive, according to a report in the Guardian newspaper yesterday (25 May).
Nuclear 'will never provide electricity for peak hours'
Paolo Frankl, head of the International Energy Agency's (IEA) Renewable Energy Unit, told EurActiv that concentrating only on "base load" providers such as coal and nuclear energy would be a mistake.
"You need to balance all the load demand and supply," he said, "and nuclear will never provide electricity for peak hours".
"This is why the huge quantities of solar PV in Germany are helping to meet the peak demand in France," he added.
Balancing demand and supply dynamics in power systems with large shares of 'variables', has traditionally raised questions about grid integration and stability.
But a new report released on Tuesday (24 May) by the IEA, 'Harnessing Variable Renewables: a Guide to the Balancing Challenge', proposes a four-step method for measuring existing resources.
After assessing the flexibility of different energy sources, the constraints of their power systems are then analysed, maximum flexibility requirements are calculated, and the amount of extra variability that can be balanced in demand and supply chains is identified.
The IEA study found that Denmark had a 63% potential to balance large shares of variable renewable energies, while the Nordic countries' potential was 48%, the UK and Ireland's was 31% and Spain and Portugal's was just 27%.
According to Frankl, "national political willingness" to harness solar PV power had partially eclipsed better criteria for locating plants.
Some well-known environmentalists, including George Monbiot, oppose tariffs for solar PV in cloudy countries such as Germany and the UK on account of their low financial returns.
"In the future, we hope that peak demand [in France] will be covered more by PV installations in the country's south or from Italy than from the north," Frankl said.
http://www.euractiv.com/en/specialreport-solarpower/special-report-solar-power-aids-german-nuclear-shutdown-news-505132
"Kun keskipäivällä on runsaasti aurinkotuotantoa, silloin jopa Ranska tuo sähköä meiltä," meklari sanoi Reutersille.
Tuo on tavallaan ymmärrettävää sillä vuoden aikana Saksa on nettosähkön myyjä toisin kuin Suomi, joka ostaa prosentuaalisesti saman määrän kuin Saksa myy (eli noin 4 % ja vuodesta riippuen 150-250 kWh asukasta kohti).
Aurinkoenergia-ala työllistää 40000 henkilöä, joten tuosta voisi helposti tulla uusi työpaikka monelle energia-alalla ydinreaktorissa työskenneelle...
Lähde:
Germany has imported more lignite coal and nuclear energy from its neighbours since the Fukushima disaster pushed it to begin closing its ageing nuclear reactors. But it is still exporting one source of electricity to France: solar power.
"When there is a lot of solar production at midday, then even France imports from us," a trader told Reuters.
Germany is one of the world's leading solar photovoltaic (PV) energy producers, with a solar capacity of almost 17GW, 40,000 employees and a 2% electricity market share. In 2010, the country set a world record for installations of solar PV in one year.
But supplies from variables such as wind and solar are intermittent – depending on the elements – and their electricity generation on one day measured in February varied from a high of 32% of supply at midnight, to a low of 18% at sunrise.
Solar PV generated more than 8,000 MW of that amount – 13% of the overall supply – for two hours at midday. But conventional sources such as oil and gas generated some 50,000 MW during the same period.
Despite this, advances in weather forecasting are making variables increasingly attractive, according to a report in the Guardian newspaper yesterday (25 May).
Nuclear 'will never provide electricity for peak hours'
Paolo Frankl, head of the International Energy Agency's (IEA) Renewable Energy Unit, told EurActiv that concentrating only on "base load" providers such as coal and nuclear energy would be a mistake.
"You need to balance all the load demand and supply," he said, "and nuclear will never provide electricity for peak hours".
"This is why the huge quantities of solar PV in Germany are helping to meet the peak demand in France," he added.
Balancing demand and supply dynamics in power systems with large shares of 'variables', has traditionally raised questions about grid integration and stability.
But a new report released on Tuesday (24 May) by the IEA, 'Harnessing Variable Renewables: a Guide to the Balancing Challenge', proposes a four-step method for measuring existing resources.
After assessing the flexibility of different energy sources, the constraints of their power systems are then analysed, maximum flexibility requirements are calculated, and the amount of extra variability that can be balanced in demand and supply chains is identified.
The IEA study found that Denmark had a 63% potential to balance large shares of variable renewable energies, while the Nordic countries' potential was 48%, the UK and Ireland's was 31% and Spain and Portugal's was just 27%.
According to Frankl, "national political willingness" to harness solar PV power had partially eclipsed better criteria for locating plants.
Some well-known environmentalists, including George Monbiot, oppose tariffs for solar PV in cloudy countries such as Germany and the UK on account of their low financial returns.
"In the future, we hope that peak demand [in France] will be covered more by PV installations in the country's south or from Italy than from the north," Frankl said.
http://www.euractiv.com/en/specialreport-solarpower/special-report-solar-power-aids-german-nuclear-shutdown-news-505132
Vastaukset 2
Vanhimmat
Nuclear 'will never provide electricity for peak hours'
Paolo Frankl, head of the International Energy Agency's (IEA) Renewable Energy Unit, told EurActiv that concentrating only on "base load" providers such as coal and nuclear energy would be a mistake.
"You need to balance all the load demand and supply," he said, "and nuclear will never provide electricity for peak hours".
"This is why the huge quantities of solar PV in Germany are helping to meet the peak demand in France," he added.
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Huvittava, mutta totuudenmukainen selitys asiaan. Teoriassa joitain ydinreaktoreita voidaan käyttää hitaan reservin kaltaisesti, mutta kokeellisia yksiköitä lukuun ottamatta ydinvoima ei tosiaan koskaan tule tuottamaan huippukäytön tarvetta.
Hyvä, että Ranska hyötyy Saksan voimavaroista ainakin tuontienergiana jos ei nyt omatuotantona voikaan hyötyä.
Kuuluisi jälleen kerran tuonne uusiutuvien puolelle. Saksan aurinkosähkön tuotannon pitää pystyssä ainoastaan jäejettömän suuret tuet. Joidenkin mielestä on järkeä maksaa viidekymmenen (50) sentin syöttötariffia kilowattituntia kohden jotta aurinkosähköä voitaisiin viedä naapurimaihin. Se on kymmenkertainen hinta ydin- tai hiilisähköön verrattuna. Sanomattakin on selvää ettei edes Saksan talous kestä suuressa mittakaavassa moista törsäystä.