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  • Zukunft Wasserstoff
    started up They can balance load drops within seconds to minutes These reserves are normally used to cover unforeseen short term fluctuations on the demand side or peak loads This balancing power though is based mainly on fossil fuels and expensive If there is a wind surplus that exceeds the actual demand and cannot be fed into the grid due to an existing load from scheduled production wind turbines are shut down by the grid operator for safety reasons even today When integrating renewable energy systems with a high installed capacity like offshore wind farms into existing grids there is the additional problem of an insufficient expansion of those in the past Regions with a high potential of wind energy or solar PV energy often have a poor electricity grid which cannot take up large amounts of power Furthermore the grid is usually planned unidirectional i e power is distributed from large central power plants down to the consumer passing a number of levels A feed of the grid from a lower up to a higher level is not always possible without works Operator of renewable energy systems as well as electricity companies are working on a solution for a better integration of renewables into the grid One promising option is the storage of wind and solar PV energy with hydrogen While feeding most of the energy into the grid a certain proportion is being used for the production of hydrogen which can then later be converted back into electricity using a fuel cell This gives the chance to decouple production and consumption and allows a more flexible energy management by combining hydrogen with fuel cells renewables can smooth their energy output drops in the production profile can be balanced and so the integration of renewable energy as a schedulable component of today s electricity supply becomes possible the production of electricity from hydrogen can start within seconds and short term supply lows can be balanced without using external fossil balancing energy But that is not all wind solar PV systems can become balancing energy producers themselves and could deliver peak load electricity for unpredicted load peaks in the grid by producing hydrogen this energy is taken out of the system and less load needs to be managed and taken on by electricity grid this could serve as a sensible alternative to costly grid extensions and refurbishments the entire production potential which exceeds the current demand and could not be fed into the grid is used hydrogen gives the option to deliver energy to markets outside the traditional electricity market namely the transport sector and private homes but also to serve as a raw product for the chemical industry see section in Renewables Problems of fluctuation in production are also minimised when single renewable sites are integrated into larger systems and are spatially distributed Research has shown that short term fluctuations in production of single wind or solar PV sites are significantly compensated for if they stand far away enough

    Original URL path: http://www.planet-energie.de/gb/planet/zukunft_h2/netzanbindung.html (2016-02-13)
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  • Zukunft Wasserstoff
    1000 turbines built in seven stages The total installed capacity will be more than 3 GW The first 80 turbines of the first building stage are already expected to produce about 1 6bn kWh This represents nearly a third of the electricity consumption of a city like Helsinki The combination of wind farms and hydrogen based energy storage can ease the integration of wind energy into the existing grid infrastructure In addition hydrogen can increase the range of possible applications of wind energy With a system consisting of an electrolyser hydrogen storage and a fuel cell a flexible energy management becomes viable the largest portion of the wind generated electricity is fed into the grid any energy which exceeds the current demand is used with the electrolyser to split water into hydrogen and oxygen The oxygen is released into the air and the hydrogen is stored the hydrogen is stored under pressure or in metal hydrides fuel cells reconvert the hydrogen with oxygen from the air to electricity this process can be started within seconds and therefore be used to produce balancing energy and peak electricity the fuel cells also help to stabilise the energy output of the wind farm

    Original URL path: http://www.planet-energie.de/gb/planet/zukunft_h2/offshore_windparks.html (2016-02-13)
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  • Zukunft Wasserstoff
    neither pollutants like sulphur oxide nor greenhouse gases are emitted Water vapour is the only exhaust fume and nitrogen oxides in ICEs respectively Hydrogen driven fuel cell cars have a higher energy efficiency than normal ICE due to a better degree of efficiency during partial load operation see right figure In addition fuel cell based engines are quieter and therefore enhance local air and living quality especially in urban areas When thinking on a global scale it has to be remarked though that hydrogen itself is not a primary energy carrier and needs to be produced by using energy Hence the environmental effects of both the production and use of hydrogen have to be assessed along the entire production chain and be compared to those of petrol diesel or natural gas Such well to wheel analyses have shown that from the environmental perspective the use of hydrogen only makes sense when the hydrogen is solely or at least largely being produced from renewable energies If not the emission of gases harmful to the environment and human health is only relocated from the exhaust to the production place of the hydrogen Another advantage of the environmental friendly production of hydrogen is the long term independence from mineral oil However hydrogen has only a very low energy density per volume under normal conditions In order to achieve a driving range of several hundred kilometres for vehicles the gas needs to be compressed compressed hydrogen CH 2 up to ca 700 bar or to be cooled down and liquefied To offer the driver the same driving range hydrogen as a fuel still takes up more than three times the space of petrol or diesel All large car manufacturers are testing cars using hydrogen and fuel cell technologies PLANET is involved in the CUTE

    Original URL path: http://www.planet-energie.de/gb/planet/zukunft_h2/strassenverkehr.html (2016-02-13)
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  • Glossary
    a power generator Gas Steam Power Plant Combination of a gas and a steam turbine power plant for power generation on short notice The gas turbine drives a power generator with hot fumes then these fumes are used for producing steam This steam can then be used to drive a steam turbine which drives a power generator This system can gain high efficiences up to 60 Green Hydrogen Hydrogen which is produced from renewable energies Greenhouse Effect Natural Greenhouse Effect When sunlight hits the surface of the earth it is being reflected as thermic radiation This radiation gets absorbed by water vapour and trace gases carbon dioxide CO 2 nitrous oxide N 2 0 ozone 0 3 in the atmosphere Without this retention the mean temperature on earth would not be 15 C but about 33 C lower Anthropogenic Greenhouse Effect Global temperature rise due to additional man made emissions of greenhouse gases mainly carbon dioxide from burning fossil fuel and CFCs Greenhouse Gases Water vapour and trace gases carbon dioxide CO 2 nitrous oxide N 2 0 ozone 0 3 methane CH 4 CFCs etc in the atmosphere which can cause the greenhouse effect Grid stability Grid frequency and voltage have due to physical reasons only a low tolerance of fluctuations Therefore electricity production and demand need to be balanced at any time to ensure a stable grid Higher Heating Value Chemical energy content of a fuel Hydrogen Lightest of all chemical elements Odourless colourless non toxic high diffusibility boiling point 259 2 C ignition limits in air 4 0 75 0 Vol Hydrogen Storage Either possible as compressed hydrogen CH 2 in tanks at 200 bar and up to 700 bar in the near future or as liquid hydrogen in cryogenic tanks or as metal hydride Idle Power Part of the DC power which is needed to build up the electro magnetic field It occurs when electric current and voltage are out of phase e g from inductivities or capacities It cannot be used by the end user and only loads the grid Life Cycle Assessment Assessment of the environmental damage of processes installations energy supply systems etc Usually assessed according to the international standards DIN ISO 14040 et sqq Liquid Hydrogen In order to increase the storage density hydrogen can be liquified It is then called LH 2 Liquid Liquefied Hydrogen and has to be stored and transported at 253 C 423 F in cryogenic tanks Liquification is very energy consuming and needs about one third of the energy content of the liquid hydrogen Load The electrical power taken from the grid Lower Heating Value The result of subtracting the latent heat of water vapour in the exhaust fume from the higher heating value This value was introduced when there was no technology available to use the heat that is contained in the vapour and the calculated efficiencies using the higher heating value were rather low MCFC Molten Carbonate Fuel Cell High temperature fuel cell with operating

    Original URL path: http://www.planet-energie.de/gb/planet/zukunft_h2/glossar.html (2016-02-13)
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  • Publikationen
    Overspeed 0 Ergebniss e Projekt 0 Ergebniss e Projekt Ökovest 0 Ergebniss e zurück Sorted by Topic Hydrogen from Renewable Energy Grid Integration of Renewables Application of Fuel Cells Building Services Wind Farm Management Wind Energy Condition Monitoring Remote Control

    Original URL path: http://www.planet-energie.de/cgi/plugins.cgi?id=99&all=1&p_in=1&p_lang=2&generate=0&f_id=planet (2016-02-13)
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  • Latest News
    of 2012 As the IWR announced after the release of the February figures by the European Power Exchange EPEX EEX the electricity price is therefore 6 1 percent lower than in the comparison period of the previous year At the beginning of 2011 when the decommissioned nuclear power stations were still in production the price was 5 05 cents per kWh In January 2012 the high generation of wind power meant that the price for German electricity on the spot market fell to as low as 3 99 cents per kWh the lowest rate since August 2010 Despite this prices for energy increased in January 2012 by 1 9 percent compared to December 2011 Federal Statistical Office 02 2012 Unfortunately in 2011 industrial and large customers were protected at the expense of private electricity customers This is why utilities have announced electricity price increases for 2012 says Ubbo de Witt Chairman of Oldenburger Energie AG EAG Against this background the company is committed to working toward 100 percent renewable energy regional value creation as well as stable and transparent costs The German government subsidises more than 1 500 energy intensive companies and large consumers by exempting them to a large extent from the Renewable Energy Levy and from network charges to the tune of one billion euros in total The latest news from Japan that planning will start in March on an offshore farm located off the coast of Fukushima that will supply 100 000 households with clean energy is a further sign of the rejection of nuclear folly and its costs Decreasing stock market price for German electricity at the European Power Exchange EPEX EEX EEX Market data from 12th March 2012 More information www eex com Date News 1 2012 10 02 2012 New Projekt corporate spokesperson Maike Behrendt 32 is the new corporate spokesperson of the Projekt group in Oldenburg In this function she acts as a link between the outside world and the companies Projekt GmbH Projekt Ökovest and Oldenburger Energie AG EAG the new group member founded in September 2011 This makes Mrs Behrendt responsible for the external presentation of the group and its first contact for the press Also included in her tasks are supporting the management and advising the subsidiaries Previously the Cultural Scientist spent three years as the managing director of the OLEC company network I m excited about representing an innovative group that applies the know how it s gained over many years to sustainable development says Behrendt This commitment extends beyond the core business of project planning for offshore and onshore wind farms as well as regenerative energy plants The latest example here is construction of an office building to passive house standards Date News 10 2011 25 11 2011 Sandbank Power sells Sandbank 24 Oldenburg company Projekt GmbH has been developing the offshore wind farm project Sandbank 24 since 2001 This included planning and development gaining official permission for the construction of 96 wind turbines and since 2005 as a shareholder in Sandbank Power GmbH Co KG preparing everything for the start of construction Furthermore an application for planning permission for another 40 wind turbines for the Sandbank Extension was drawn up and submitted Now the company has signed a contract with Vattenfall for the sale of both projects Vattenfall is the owner of the Dan Tysk wind farm in the direct vicinity of Sandbank 24 to the west of the island of Sylt in the SylWin cluster Now Sandbank Power GmbH Co KG and Vattenfall as the purchaser wrapped up the deal With its 96 wind turbines Sandbank 24 is currently the offshore wind farm with the largest approved pilot phase in Germany and a further 40 turbines could be added to that when Sandbank Extension is approved Purchaser Vattenfall expects the first stage to achieve a capacity of up to 576 megawatts MW on a site 90 km west of the island of Sylt added to its Dan Tysk wind farm scheduled for construction start in 2012 The purchase by Vattenfall is also a recognition of the excellent development work of the Oldenburg Projekt GmbH which in 2004 obtained the construction approval for Sandbank 24 from the German Federal Maritime and Hydrographic Agency BSH in 2007 was able to increase the number of wind turbines to a total of 96 and in 2009 achieved the first approval according to the BSH standard design structure of wind energy turbines That makes Sandbank a solid investment for Vattenfall especially as the contracting parties already have a history together They jointly worked on the offshore wind energy cluster SylWin on aspects including operation maintenance O M and technical project development At the beginning of 2011 the network operator TenneT placed an order for a converter station for 864 MW in the SylWin cluster the largest joint grid connection commissioned so far Even after the sale Projekt GmbH will be involved in a consultancy role in the Sandbank 24 project Managing Director Ubbo de Witt commented We re delighted that we will be able to support Vattenfall one of the largest offshore wind farm operators with our know how during the further development of the project As part of its own offshore activities the company is now preparing the offshore wind farm Witte Bank for official approval Beyond the horizon ist the best place for wind energy Illustration and slogan of Sandbank 24 Date News 9 2011 25 11 2011 BWE values company s expertise Roland Hagendorff of Projekt GmbH has once again been elected as a speaker for the working group Marking wind energy turbines of the German Wind Energy Association BWE He brings to the office his expertise in the area of offshore wind energy turbines The goal of the working group is to cooperate with the responsible government departments flight security organisations and experts to find solutions for new more efficient marking systems These are necessary because of ever taller towers but must also respond to environmental concerns

    Original URL path: http://www.planet-energie.de/gb/planet/meldungen/ (2016-02-13)
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