[verwijderd] 30 oktober 2007 09:55 auteur info [verwijderd] Lid sinds: 01 jan 0001 Laatste bezoek: 01 jan 0001 Aanbevelingen Ontvangen: 0 Gegeven: 0 Aantal posts: 0 Statkraft makes plans to build world's first osmotic power plantNorwegian power producer Statkraft said this month it intends to build the world's first prototype osmotic power plant. Osmotic power is a renewable energy source, Statkraft said in an October 3 statement. It is based on the natural process of osmosis. In an osmotic power plant, sea water and fresh water are separated by a membrane. The sea water draws the fresh water through the membrane, which increases the pressure on the sea-water side. The increased pressure is used to produce power.After ten years of research and development, Statkraft said it believed the time is right to build the first osmotic power plant prototype and has stepped up its initiatives and investments to develop the technology. The power producer to date has invested more than NOK 100 million ($18.4 million) to osmotic energy. The research is supported by the Research Council of Norway.Osmotic power is clean and emissions-free and could become competitive within a few years, said Statkraft CEO Bard Mikkelsen. Statkraft estimates osmotic power could contribute 1,600 TWh annually on a global scale, including 200 TWh in Europe and 12 TWh in Norway – 10% of Norway's current power production.The prototype plant will be built at the paper pulp manufacturer Sodra Cell Tofte's plant at Hurum in Buskerud, Norway.The location will provide the osmotic plant with a good supply of fresh water and sea water, along with access to established infrastructure, Statkraft said. Construction of the prototype is expected to be completed by end-2008, and Statkraft expects it to produce 2-4 kW of energy. Aanbevelingen 1 ” Quote Reageren Niet oké
voda 1 november 2007 17:15 auteur info voda Lid sinds: 02 dec 2005 Laatste bezoek: 08 mei 2024 Aanbevelingen Ontvangen: 82639 Gegeven: 20981 Aantal posts: 365.460 Is dit ook osmose? Denk het wel. Leuk bericht, toch?RTRS-Centrale maakt elektriciteit uit zoet en zout water ROTTERDAM (ANP) - Rijkswaterstaat en energiebedrijf Eneco gaan een elektriciteitscentrale bouwen die op een schone manier elektriciteit maakt door het mengen van zout en zoet water. De centrale komt te staan bij de Afsluitdijk, waar zowel zout water uit de Waddenzee als zoet water uit het IJsselmeer beschikbaar is. De partijen maakten donderdag bekend een intentieverklaring te hebben getekend. De centrale is op laboratoriumschaal ontwikkeld door het bedrijf Redstack en maakt gebruik van de techniek Blue Energy. Met een speciaal membraan tussen de zoet- en zoutwaterstromen worden daarbij zoutwaterdeeltjes opgevangen, die elektrische stroompjes afgeven. Bij samenspel van vele membranen ontstaat genoeg elektriciteit voor gebruik in woningen. ((ANP Redactie Economie, email economie(at)anp.nl, +31 20 504 5999)) Aanbevelingen 1 ” Quote Reageren Niet oké
[verwijderd] 1 november 2007 21:45 auteur info [verwijderd] Lid sinds: 01 jan 0001 Laatste bezoek: 01 jan 0001 Aanbevelingen Ontvangen: 0 Gegeven: 0 Aantal posts: 0 Lijkt me een fantastisch bericht. We kunnen nog wel een paar centrales bouwen aan de afsluitdijk, meer dan 30 KM lang! Tevens een mooie impuls voor het noorden van ons land. Aanbevelingen 0 ” Quote Reageren Niet oké
voda 1 november 2007 21:49 auteur info voda Lid sinds: 02 dec 2005 Laatste bezoek: 08 mei 2024 Aanbevelingen Ontvangen: 82639 Gegeven: 20981 Aantal posts: 365.460 Hé, hé, eindelijk reageert iemand op dit ZEER GOEDE bericht!! Aanbevelingen 0 ” Quote Reageren Niet oké
[verwijderd] 6 november 2007 21:04 auteur info [verwijderd] Lid sinds: 01 jan 0001 Laatste bezoek: 01 jan 0001 Aanbevelingen Ontvangen: 0 Gegeven: 0 Aantal posts: 0 Ik ben ook al meer dan 25 jaar met alternatieve energie bezig en heb vooral interesse voor natuurlijke bronnen als aardwarmte, wind, getijden en zon. Deze "osmose"techniek past daar goed in, vind ik. Aanbevelingen 0 ” Quote Reageren Niet oké
voda 24 november 2009 16:09 auteur info voda Lid sinds: 02 dec 2005 Laatste bezoek: 08 mei 2024 Aanbevelingen Ontvangen: 82639 Gegeven: 20981 Aantal posts: 365.460 Statkraft opent prototype osmosecentrale24 nov 2009, 10:27 uurOSLO (AFN) - Het Noorse energiebedrijf Statkraft heeft dinsdag bij Oslo een prototype geopend van een energiecentrale die gebruikmaakt van osmose: het opwekken van stroom door zoet water en zeewater te mengen in een installatie.Osmosecentrales kunnen in principe overal worden gebouwd waar zoet water de zee instroomt. Deze vorm van duurzame energie zou in de helft van de Europese behoefte kunnen voorzien.Het prototype heeft een beperkte capaciteit en is vooral bedoeld voor het testen en ontwikkelen van de technologie. Statkraft hoopt binnen een paar jaar een commerciële osmosecentrale te kunnen bouwen. Aanbevelingen 0 ” Quote Reageren Niet oké
[verwijderd] 3 december 2009 21:49 auteur info [verwijderd] Lid sinds: 01 jan 0001 Laatste bezoek: 01 jan 0001 Aanbevelingen Ontvangen: 0 Gegeven: 0 Aantal posts: 0 ERII: iets wat ik periodiek gewoon bijkoop omdat ik vertrouwen heb in datgene wat ze ons brengen. Vandaag uitbreiding door overname met als gevolg dat deze niche nog meer op een monopolie gaat lijken. +14 pct vandaag...ik mag niet klagen :)Link met het topic: www.businesswire.com/portal/site/home... Aanbevelingen 1 ” Quote Reageren Niet oké
[verwijderd] 4 december 2009 10:53 auteur info [verwijderd] Lid sinds: 01 jan 0001 Laatste bezoek: 01 jan 0001 Aanbevelingen Ontvangen: 0 Gegeven: 0 Aantal posts: 0 mooi spul! Aanbevelingen 0 ” Quote Reageren Niet oké
voda 13 oktober 2011 16:50 auteur info voda Lid sinds: 02 dec 2005 Laatste bezoek: 08 mei 2024 Aanbevelingen Ontvangen: 82639 Gegeven: 20981 Aantal posts: 365.460 Osmotic power generation - wave of future in clean energy? 1053 words 10 October 2011 Nikkei Weekly JEJ CTGDJC English (c) 2011 Nihon Keizai Shimbun, Inc. All rights reserved. Japan's extensive coastline, rivers could be perfect for clean new energy tech Scientists in Japan and Norway are actively pursuing practical ways of generating electricity from the difference in salinity between seawater and fresh water. The process goes by several names, including salinity gradient power and osmotic power. But whatever the name, it is a dream type of renewable energy, inexhaustible and unaffected by the weather, unlike solar power and wind power. Natural, renewable energies have a bad reputation for being both costly and inefficient, so there is a lot of hope riding on the practical development of osmotic power generation. The technology is especially suitable for Japan, given the enormous length of coastline the nation boasts. Pickled power Just like making Japanese pickles. That is how Prof. Akihiko Tanioka of the Tokyo Institute of Technology likens the process of osmotic power generation. Tanioka leads a project in Japan to develop a viable method of power generation based on the salinity difference between seawater and fresh water. The research is being carried out at a pilot plant in Fukuoka by the Tokyo Institute of Technology, Nagasaki University and water treatment equipment maker Kyowakiden Industry Co. When seawater and fresh water are separated by a special membrane that is permeable to water molecules but blocks the passage of salts, water molecules will naturally migrate to the side where the salt concentration is higher due to the process of osmosis. That same process is used to draw the water out of vegetables like cucumbers and eggplants to make Japanese pickles. In the process Tanioka and his colleagues are developing, the seawater and the fresh water are pumped through pipes that are divided down the middle by a permeable membrane. As the two separate streams of water flow down the pipe, fresh water migrates across the membrane to the seawater side, boosting the flow volume on that side and giving it the extra momentum to spin a turbine to generate electricity. Different engines Conventional hydroelectric power systems also work to generate electricity by spinning turbines using the momentum of water. But whereas hydroelectric power exploits a difference in height to create a water force, osmotic power exploits a difference in salinity. The process thus also works on flat land, Tanioka explained. At the Fukuoka pilot plant, the fresh water is pumped from a nearby wastewater treatment plant, and the seawater, which has double the normal ocean concentration of salt, is pumped from a nearby desalination facility where ocean water is used to make fresh water. There are eight pipes in this pilot plant, each 30cm in diameter and 1.4 meters in length. When the two kinds of water move through these pipes, the osmotic effect boosts the water flow on the seawater side of the pipes by 50-80%. After passage through the pipes, the seawater is returned to the ocean and the fresh water is returned to a river. "In one pipe alone the system generates a water force equivalent to a fall of 300m," explained Hideyuki Sakai, president of Kyowakiden Industry. Electricity must be consumed to drive the pumps, but more than that amount is generated, so the system functions as a generator, producing some 1-2kw of electricity. Norway is another nation also making progress on the practical development of osmotic power. State-owned power company Statkraft AS is operating an experimental plant there, and it has also partnered here in Japan with Nitto Denko Corp. The Japanese company has developed an osmotic membrane that is only 0.1mm thick, and is investigating its use for osmotic power in cooperation with Statkraft at its plant in Shiga Prefecture overlooking Lake Biwa. For osmotic power generation to work, the salinity differential between the seawater and fresh water must be maintained. "What you need is a technology that prevents the salt component of the seawater from migrating to the fresh water side, while enabling the fresh water to efficiently move to the seawater side," noted Masahiko Hirose, head of the membrane division at Nitto Denko. Special membrane With that objective in mind the company has set out to develop a membrane for osmotic power, basing the work on its technologies for osmotic membranes for desalination of seawater. Hirose said the goal is to have a new membrane ready next year that can be tested at the facility in Norway. One of the big draws about osmotic power as a renewable energy is that it is not affected by the weather. With an effective operating efficiency of 85% or more, it is more than four times as efficient as solar power and wind power. According to estimates by Tanioka's group, the power-generating cost of osmotic power is 9-26 yen (11-33 cents) per kilowatt-hour, which is cheaper than the 40 yen for solar power and competitive with the 14-24 yen for wind power. As conceived, osmotic power plants would be situated near the mouths of rivers for ready access to seawater and fresh water supplies. "Considering the flow volume of Japan's rivers, there is a potential capacity for 6 million kw of power generation, the equivalent of five or six nuclear power reactors," asserted Tanioka. That said, many issues need resolving before osmotic power plants can be built. One problem is the durability of the membranes, and another is the whole question of whether a large-scale power plant would actually work. Tanioka's group of the Tokyo Institute of Technology, Nagasaki University and Kyowakiden Industry aims to build a commercial-scale power plant in three years in cooperation with Toray Industries Inc., Toyobo Co. and Yamaguchi University. Statkraft and Nitto Denko plan to build a 2,000kw experimental plant by 2015. The earthquake and tsunami in the Tohoku region in March shattered the myth of the safety of nuclear power when they damaged the Fukushima Daiichi nuclear power plant. The accident also attracted greater attention for solar and other alternative power sources. When its territorial waters and its elusive economic zone are factored together, Japan has the sixth largest coastline among the nations of the world. That fact alone explains the potential for Japan of osmotic power generation using ocean resources. (The Nikkei Weekly 10/10/2011 Edition) Nikkei Digital Media Inc. Aanbevelingen 0 ” Quote Reageren Niet oké
[verwijderd] 11 november 2011 08:36 auteur info [verwijderd] Lid sinds: 01 jan 0001 Laatste bezoek: 01 jan 0001 Aanbevelingen Ontvangen: 0 Gegeven: 0 Aantal posts: 0 quote:Pannevogel schreef op 1 november 2007 21:45:Lijkt me een fantastisch bericht. We kunnen nog wel een paar centrales bouwen aan de afsluitdijk, meer dan 30 KM lang! Tevens een mooie impuls voor het noorden van ons land.www.bootjesgek.com/?p=4602www.youtube.com/watch?gl=NL&hl=nl...Gr,JJ Aanbevelingen 0 ” Quote Reageren Niet oké
voda 7 maart 2014 16:49 auteur info voda Lid sinds: 02 dec 2005 Laatste bezoek: 08 mei 2024 Aanbevelingen Ontvangen: 82639 Gegeven: 20981 Aantal posts: 365.460 Héél erg jammer (zie ook mijn startpost)Statkraft Shelves Osmotic Power ProjectNorwegian power company Statkraft has shelved its much-watched effort to harness energy from pressure-retarded osmosis (PRO). It said in a rare industry admission that the technology could not be sufficiently developed within the current market outlook to become competitive “within the foreseeable future.” The company has been working on osmotic power for more than a decade. After years of collaborative research and development with the Norwegian University of Science and Technology, Statkraft in 2009 started up one of the world’s first osmotic power plants at Tofte on the Oslo Fjord in Norway, a facility that produced 2 kW to 4 kW (Figure 4).The prototype operated on the PRO process, which involves pumping seawater at 60% to 85% of the osmotic pressure against one side of semipermeable membranes whose other side is exposed to freshwater. When freshwater, compelled by osmosis, flows across the membranes, it dilutes the saltwater and increases its volume—and consequently, the pressure within the saltwater chamber. A turbine is spun as the pressure is compensated, driving a connected generator. PRO can be thought of as the reverse osmosis process (used for desalination and water treatment) running backward and producing power from the flow of saltwater. As early as last September, Statkraft was reportedly assessing a location for a possible 1-MW to 2-MW pilot osmotic power facility. In December, however, the company declared it was discontinuing its efforts and leaving the technology development to “other players in the global market.” “Our main challenge has been to make the technology efficient enough to achieve energy production costs on par with competing technologies,” said Statkraft department manager Stein Erik Skilhagen. “There are other technologies which have developed enormously in recent years. These are more competitive and relevant investments for us in the future,” he said. Statkraft, which is Europe’s largest generator of renewable power, noted investor interest in osmotic power has been sluggish since the idea to exploit osmotic pressure for energy was conceived by a U.S. scientist in the 1970s. “A quarter of a century had to pass before market conditions made several independent public and private enterprises take up the idea and start developing the technology further,” it said. Yet, the company stressed that it had proven that the technology, which it had substantially improved, “works.” It also said that the technology can be used in other applications such as the production of potable water. “We are now leaving the process of maturing the technology to others, as several independent public and private enterprises around the world are looking into this already,” Skilhagen said. —Sonal Patel, associate editor (@POWERmagazine, @sonalcpatel)www.powermag.com/statkraft-shelves-os... Aanbevelingen 0 ” Quote Reageren Niet oké
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