• 35 mins Thanksgiving Gas Prices At 3-Year High
  • 5 hours Iraq’s Giant Majnoon Oilfield Attracts Attention Of Supermajors
  • 7 hours South Iraq Oil Exports Close To Record High To Offset Kirkuk Drop
  • 10 hours Iraqi Forces Find Mass Graves In Oil Wells Near Kirkuk
  • 10 hours Chevron Joint Venture Signs $1.7B Oil, Gas Deal In Nigeria
  • 11 hours Iraq Steps In To Offset Falling Venezuela Oil Production
  • 13 hours ConocoPhillips Sets Price Ceiling For New Projects
  • 3 days Shell Oil Trading Head Steps Down After 29 Years
  • 3 days Higher Oil Prices Reduce North American Oil Bankruptcies
  • 3 days Statoil To Boost Exploration Drilling Offshore Norway In 2018
  • 3 days $1.6 Billion Canadian-US Hydropower Project Approved
  • 3 days Venezuela Officially In Default
  • 3 days Iran Prepares To Export LNG To Boost Trade Relations
  • 4 days Keystone Pipeline Leaks 5,000 Barrels Into Farmland
  • 4 days Saudi Oil Minister: Markets Will Not Rebalance By March
  • 4 days Obscure Dutch Firm Wins Venezuelan Oil Block As Debt Tensions Mount
  • 4 days Rosneft Announces Completion Of World’s Longest Well
  • 4 days Ecuador Won’t Ask Exemption From OPEC Oil Production Cuts
  • 4 days Norway’s $1 Trillion Wealth Fund Proposes To Ditch Oil Stocks
  • 5 days Ecuador Seeks To Clear Schlumberger Debt By End-November
  • 5 days Santos Admits It Rejected $7.2B Takeover Bid
  • 5 days U.S. Senate Panel Votes To Open Alaskan Refuge To Drilling
  • 5 days Africa’s Richest Woman Fired From Sonangol
  • 5 days Oil And Gas M&A Deal Appetite Highest Since 2013
  • 5 days Russian Hackers Target British Energy Industry
  • 5 days Venezuela Signs $3.15B Debt Restructuring Deal With Russia
  • 5 days DOJ: Protestors Interfering With Pipeline Construction Will Be Prosecuted
  • 5 days Lower Oil Prices Benefit European Refiners
  • 6 days World’s Biggest Private Equity Firm Raises $1 Billion To Invest In Oil
  • 6 days Oil Prices Tank After API Reports Strong Build In Crude Inventories
  • 6 days Iraq Oil Revenue Not Enough For Sustainable Development
  • 6 days Sudan In Talks With Foreign Oil Firms To Boost Crude Production
  • 6 days Shell: Four Oil Platforms Shut In Gulf Of Mexico After Fire
  • 6 days OPEC To Recruit New Members To Fight Market Imbalance
  • 7 days Green Groups Want Norway’s Arctic Oil Drilling Licenses Canceled
  • 7 days Venezuelan Oil Output Drops To Lowest In 28 Years
  • 7 days Shale Production Rises By 80,000 BPD In Latest EIA Forecasts
  • 7 days GE Considers Selling Baker Hughes Assets
  • 7 days Eni To Address Barents Sea Regulatory Breaches By Dec 11
  • 7 days Saudi Aramco To Invest $300 Billion In Upstream Projects

Breaking News:

Thanksgiving Gas Prices At 3-Year High

Alt Text

The Hidden Cost Of Electric Cars

As countries across the globe…

James Burgess

James Burgess

James Burgess studied Business Management at the University of Nottingham. He has worked in property development, chartered surveying, marketing, law, and accounts. He has also…

More Info

Using Ocean Temperature Differences to Create Renewable Energy

Using Ocean Temperature Differences to Create Renewable Energy

Ocean Thermal Energy Conversion (OTEC) is an idea for creating renewable energy by exploiting the difference in ocean temperatures between the surface and the seabed. The OTEC permit office first opened in 1981 as part of NOAA, America’s National Oceanic and Atmospheric Administration, the marine counterpart to NASA. It was created after the oil price spike of the 1970’s when interest in alternative power sources rose. Oil prices eventually settled and as a result interest in the alternative power sources dwindled, so in 1994, just 13 years later the OTEC office was closed without ever having issued a permit. Good old American bureaucracy.

Now, again during times of high oil prices, alternative energy sources are back with vengeance. All options are being considered and one of them is OTEC. Luckily the concept is reasonably simple. A fluid with a low boiling point, such as ammonium, is vaporised in a heat exchanger using surface water from the sea with an average temperature of about 25°C. The resulting gas has a sufficient pressure to drive a turbine and create electricity. The gas is then cooled using seawater pumped up from a depth of about one kilometre and with an average temperature of about 5°C. The liquid ammonia can then be reheated and the whole process started again. Theoretically this means that OTEC plants can be built anywhere with a surface water temperature of 25°C and a depth of at least one kilometre.

One company pursuing OTEC technology is Lockhead Martin, which is collaborating with a smaller firm called Makai Ocean Engineering to build a 10 megawatt plant in Hawaii that is projected to open in 2015. Then if this plant is successful the idea is to construct a 100 megawatt plant by 2020.

Most of the technology necessary can be taken from existing areas of engineering, such as deepwater oil drilling, where the heat exchangers and pipework required to make a 10MW plant already exist. The 100MW facility however will need a pipe that is not only 1km long but also ten metres in diameter, in order to supply the necessary amount of water. It must also be strong enough to resist waves and ocean climates for decades. Kerry Kehoe, the current head of OTEC activities at NOAA, estimates such a facility could cost $1 billion.

By. James Burgess of Oilprice.com




Back to homepage


Leave a comment
  • Mike Straub on January 25 2012 said:
    James,

    There is much bigger OTEC news happening out there that you completely missed! The Bahamas is building 2 commercial OTEC plants, and other caribbean nations are lining up behind them. Also, one of the reasons OTEC is really gaining momentum now is not all about power, it's about water. The OTEC plants in the Bahamas will produce millions of gallons of clean drinking water as a byproduct. So OTEC is clean, base-load power, and clean water. That's the kind of energy source that will change the lives of millions for generations.

    Here's all the info on the Bahamas deal!...
    http://www.theonproject.org/2011/the-bahamas-sign-memorandum-of-understanding-to-build-two-otec-plants/?utm_source=oilprice&utm_medium=web&utm_campaign=mscomment
  • john mc farlane mcfarlane ,navigation on February 08 2012 said:
    Its not new tec, but generaly not known. Why?

Leave a comment




Oilprice - The No. 1 Source for Oil & Energy News