Archive for May 25th, 2008

25
May
08

Belanda Sudah Lama Siapkan Blue Energy (air laut dan air sungai)

Eddi Santosa – detikcom, 23/05/2008 22:42 WIB, Laporan dari Den Haag

Pusat Blue Energy Afsluitdijk dan Prinsip Dasar

Den Haag – Pemerintah Belanda, pusat iptek Wetsus, serta swasta ENECO Energie dan REDstack sudah sejak 2004 menyiapkan blue energy. Tahun ini akan memasuki fase ujicoba.

Surat Hasrat atau Letter of Intent keempat pihak itu diteken tiga tahun kemudian (Desember
2007), di mana mereka sepakat untuk mengembangkan pusat energi listrik dari perbedaan potensi antara air laut (asin) dan air sungai (tawar).

Lokasi yag ditetapkan adalah kawasan berlimpah suplai air di muara Waddenzee dan Afsluitdijk.

Blue energy atau disebut juga Energi Osmotik dapat dilakukan dengan dua metode: Reverse Electrodialysis (RED) dan Pressure Retarded Osmosis (PRO). Belanda lebih memilih metode pertama (RED). Metode ini dipilih karena dinilai lebih menjanjikan untuk pengekstrakan energi dari perbedaan elektrolit antara air laut dan air sungai.

Perbedaan itu –melalui pemisahan membran– menurut Persamaan Nernst besarnya kurang lebih 80mV: (gambar rumus Nernst terlampir).

Perbedaan tegangan yang kecil ini dilipatgandakan dengan kompartemen seri oleh membran-membran yang selektif terhadap anion dan kation sehingga diperoleh tegangan besar untuk energi. Listrik dari Blue Energy ini sangat sustainable, karena tanpa emisi CO2, NOx dan SOx.

Lagi pula bahan bakunya melimpah dan gratis dari alam. Menurut bahan informasi yang diperoleh detikcom dari Wetsus, secara teori air sungai Rijn yang bertemu dengan Laut Utara dapat memasok 6000 megawatt (MW).

Kurang jelas mengapa pusat Blue Energy versi Joko Suprapto memilih lokasi di Cikeas. ( es / es )

Rujukan menarik:
1. blue energy belanda (Wetsus)
http://www.onderzoekinformatie.nl/en/oi/nod/organisatie/ORG1241843/
http://www.youtube.com/watch?v=X2BtdtvLrjk

2. osmotic energy
http://exergy.se/goran/cng/alten/proj/97/o/

3. yang lain:
http://www.jbc.org/cgi/reprint/276/27/25078.pdf
http://www.pnas.org/cgi/reprint/80/14/4577.pdf
http://www.verdexchange.org/node/35

25
May
08

Norwegian oil company to build floating wind turbine

http://news. xinhuanet. com/english/ 2008-05/23/ content_8238110. htm

www.chinaview. cn 2008-05-23 19:03:41 Print BEIJING, May 23 (Xinhuanet) –

A Norwegian oil company plans to build next year what it says will be the world’s first full-scale floating wind turbine. State-controlled StatoilHydro ASA, based in the western port of Stavanger, announced it intent Thursday. StatoilHydro is the key producer in the offshore oil industry that makes Norway a major petroleum exporter. The company said the 80 million U.S. dollar pilot project combines its offshore oil experience with advanced technology for wind power. “We have drawn on our offshore expertise from the oil and gas industry to develop wind power offshore,” said Alexandra Bech Gjoerv, head of StatoilHydro’s new energy unit. The 2.3 megawatt windmill will be placed about six miles off the coast of Karmoey, near Stavanger on the west coast. StatoilHydro said it has already signed contracts for the construction of the wind turbine and its floating base. The electricity will be sent to land through underwater cables. Previous ocean windmill projects have been based on towers built onto the seabed near land, rather than floating structures.

However, windmills on land or near the coast often draw complaints they spoil the view and disturb wildlife. Bech Gjoerv said the windmill, with 260-foot blades, will be mounted on top of a giant spar buoy, a floating structure that is six meters in diameter and 100 meters deep. Spar buoys are often used for such things as offshore loading of oil from platforms to tankers. The company said it plans to conduct a two-year test with the unit after it is goes on line in late 2009 in hopes of demonstrating that floating wind power is commercially viable. (Agencies)




 

May 2008
M T W T F S S
« Apr   Nov »
 1234
567891011
12131415161718
19202122232425
262728293031  

Flickr Photos

every gal deserves a sPAW day! heh.

Vol sur Marymoor

Happy Thanksgiving Everyone!!

More Photos

Blog Stats

  • 17,732 hits

Tags

where you from

<script language="Javascript" src="http://www.ip2phrase.com/ip2phrase.asp?template=You are browsing our website through ISP .">
Powered by IP2Location.com