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Vortrag Lübeck 2006 - Übersicht: Unterschied zwischen den Versionen

Aus Transnational-Renewables

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|[[Datei:LB2006-slide2.jpg|200px|verweis=Vortrag Lübeck 2006 - Folie 2]]
 
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|Here you see a view of a solar thermal power plant which leads us to the potentials of this kind of electricity production. The direct solar radiation is concentrated in parabolic troughs to heat up a fluid that is used to power a conventional thermal power plant. Dependent on the design of the power plant the heat is used with an efficiency between approx. 32 and 38 % to produce electricity.
 
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|[[Datei:LB2006-slide3.jpg|200px|verweis=Vortrag Lübeck 2006 - Folie 3]]
 
|[[Datei:LB2006-slide3.jpg|200px|verweis=Vortrag Lübeck 2006 - Folie 3]]
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|The solar heat can either directly be fed into the conventional thermal power plant or stored in a thermal storage to be used later (e.g. after sunset) to produce electricity.
 
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|[[Datei:LB2006-slide4.jpg|200px|verweis=Vortrag Lübeck 2006 - Folie 4]]
 
|[[Datei:LB2006-slide4.jpg|200px|verweis=Vortrag Lübeck 2006 - Folie 4]]
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|Here the potential heat production of the solar field of a SEGS power plant is shown. Very good conditions are found in the Sahara where the potential electricity production is more than 500 times the electricity consumption of the EU member states.
 
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|[[Datei:LB2006-slide5.jpg|200px|verweis=Vortrag Lübeck 2006 - Folie 5]]
 
|[[Datei:LB2006-slide5.jpg|200px|verweis=Vortrag Lübeck 2006 - Folie 5]]
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|The seasonal variation of power production from SEGS power plants is significantly smaller at lower latitudes.
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On this slide you can see for example the ratio between the average electricity production in December and July. As it is the case for the PV electricity production, at the southern Sahara we find that the production only changes slightly over the months while the variations increase much stronger going to higher longitudes.
 
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|[[Datei:LB2006-slide6.jpg|200px|verweis=Vortrag Lübeck 2006 - Folie 6]]
 
|[[Datei:LB2006-slide6.jpg|200px|verweis=Vortrag Lübeck 2006 - Folie 6]]
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|Since the electricity production with solar thermal power plants is – as we will see later – is relatively cheap at good sites we can also think at transmitting the electricity from Africa to Europe.
 
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|[[Datei:LB2006-slide7.jpg|200px|verweis=Vortrag Lübeck 2006 - Folie 7]]
 
|[[Datei:LB2006-slide7.jpg|200px|verweis=Vortrag Lübeck 2006 - Folie 7]]
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|But the European electricity network within and especially between the countries is to weak for high wind power penetration ore huge amounts of renewable electricity from solar thermal power plants. This is also true for the connection to Africa.
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For example the Net Transfer Capacities from Morocco to Spain with its 400 MW and the 1100 MW from Spain to France would not allow high power transfer even if the capacity soon is enlarged to 1400 MW between Morocco and Spain.
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But there is a solution. High Voltage Direct Current Transmission (HVDC = HGÜ) is a technology used since many decades for transmission of huge amounts of electricity over far distances at very low losses and low costs.
 
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|[[Datei:LB2006-slide8.jpg|200px|verweis=Vortrag Lübeck 2006 - Folie 8]]
 
|[[Datei:LB2006-slide8.jpg|200px|verweis=Vortrag Lübeck 2006 - Folie 8]]
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|With the underlying economical assumptions based on today's technologies and prices shown in the upper right tables the costs of solar thermal electricity production are calculated for some selected sites. The results are listed in the table at the left side.
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Using today's High Voltage DC (HVDC) technology to transport the electricity to Europe (e.g. Kassel GER) the costs of electricity would even for the farest distance mentioned only increase by 30%. The underlying economical assumptions for HVDC technology are shown in the lower right table.
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The costs of electricity in Kassel do not seem to be very unreasonable. The option to import solar thermal electricity from Northern Africa to Europe becomes even more interesting, if the investment costs for solar fields, the most costly part of SEGS power plants, will reduce. An reduction to roughly 50% of the today's field costs is expected as soon as a capacity of 7 GW of SEGS is erected world-wide. This will reduce the costs of electricity in Kassel to approx. 60% or below 6 €ct/kWh.
 
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|[[Datei:LB2006-slide9.jpg|200px|verweis=Vortrag Lübeck 2006 - Folie 9]]
 
|[[Datei:LB2006-slide9.jpg|200px|verweis=Vortrag Lübeck 2006 - Folie 9]]

Version vom 3. Oktober 2010, 11:05 Uhr

Lecture Magdeburg [2001,en], Vortrag Lübeck [2006,de], Lecture Barcelona [2008,en], Vortrag EWEA 2000 [2000,en]
Vorstellung regenerativer Energien: Biomasse, Windenergie, Fallwindkraftwerke, Geothermie, Wasserkraft, Solarenergie


Wirtschaftlich realisierbare Stromversorgung für Europa un seine Nachbarn

  • diese Folien zeigen eindrucksvoll, die Möglichkeit regenerative Energien.....
LB2006-slide1.jpg I my talk I will show that we can produce all our electricity from renewable sources. This would have a high positive impact on climate protection since today nearly half of the CO2 emissions are caused by electricity production.

In my talk I will introduce you to some the worldwide potentials for renewable electricity production. The techniques we will discuss are electricity production via solar thermal power plants and hydropower and finally we will focus on wind energy. For each of these options of power generation I am going to point out the characteristics with regard to their specific temporal behaviour and the costs to be expected. We will see that the temporal behaviour significantly changes with the size and the selection of the catchment area used for the power generation. We will also touch on the topics of backup and storage needs, the subject of grid capacities and of cause the question of electricity costs. After this we will come to economically viable „Scenarios for a Future Electricity Supply“ * based 100% on renewable energies. It will be shown that a change to a totally renewable electricity supply is neither a technical nor a economic problem but mainly a political task.

  • Background Information:

Szenarien zur zukünftigen Stromversorgung - Kostenoptimierte Variationen zur Versorgung Europas und seiner Nachbarn mit Strom aus erneuerbaren Energien https://kobra.bibliothek.uni-kassel.de/handle/urn:nbn:de:hebis:34-200604119596 Low Cost but Totally Renewable Electricity Supply for a Huge Supply Area http://www.iset.uni-kassel.de/abt/w3-w/projekte/LowCostEuropElSup_revised_for_AKE_2006.pdf

LB2006-slide2.jpg Here you see a view of a solar thermal power plant which leads us to the potentials of this kind of electricity production. The direct solar radiation is concentrated in parabolic troughs to heat up a fluid that is used to power a conventional thermal power plant. Dependent on the design of the power plant the heat is used with an efficiency between approx. 32 and 38 % to produce electricity.
LB2006-slide3.jpg The solar heat can either directly be fed into the conventional thermal power plant or stored in a thermal storage to be used later (e.g. after sunset) to produce electricity.
LB2006-slide4.jpg Here the potential heat production of the solar field of a SEGS power plant is shown. Very good conditions are found in the Sahara where the potential electricity production is more than 500 times the electricity consumption of the EU member states.
LB2006-slide5.jpg The seasonal variation of power production from SEGS power plants is significantly smaller at lower latitudes.

On this slide you can see for example the ratio between the average electricity production in December and July. As it is the case for the PV electricity production, at the southern Sahara we find that the production only changes slightly over the months while the variations increase much stronger going to higher longitudes.

LB2006-slide6.jpg Since the electricity production with solar thermal power plants is – as we will see later – is relatively cheap at good sites we can also think at transmitting the electricity from Africa to Europe.
LB2006-slide7.jpg But the European electricity network within and especially between the countries is to weak for high wind power penetration ore huge amounts of renewable electricity from solar thermal power plants. This is also true for the connection to Africa.

For example the Net Transfer Capacities from Morocco to Spain with its 400 MW and the 1100 MW from Spain to France would not allow high power transfer even if the capacity soon is enlarged to 1400 MW between Morocco and Spain.

But there is a solution. High Voltage Direct Current Transmission (HVDC = HGÜ) is a technology used since many decades for transmission of huge amounts of electricity over far distances at very low losses and low costs.

LB2006-slide8.jpg With the underlying economical assumptions based on today's technologies and prices shown in the upper right tables the costs of solar thermal electricity production are calculated for some selected sites. The results are listed in the table at the left side.

Using today's High Voltage DC (HVDC) technology to transport the electricity to Europe (e.g. Kassel GER) the costs of electricity would even for the farest distance mentioned only increase by 30%. The underlying economical assumptions for HVDC technology are shown in the lower right table.

The costs of electricity in Kassel do not seem to be very unreasonable. The option to import solar thermal electricity from Northern Africa to Europe becomes even more interesting, if the investment costs for solar fields, the most costly part of SEGS power plants, will reduce. An reduction to roughly 50% of the today's field costs is expected as soon as a capacity of 7 GW of SEGS is erected world-wide. This will reduce the costs of electricity in Kassel to approx. 60% or below 6 €ct/kWh.

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