Ocean Thermal Energy Conversion (OTEC) uses large flows of warm surface seawater and cold deep seawater to generate clean electricity. The tropical ocean at a typical OTEC site has two distinct layers: a warm surface layer with low nutrient levels, and a cold deep layer that is nutrient-rich. Introducing deep nutrients into the ocean’s sun-lit upper layers could potentially increase plankton growth or cause algal blooms. Thus, seawater discharged from an OTEC plant should be… Continue reading
I recently found this short YouTube video of the Xenesys OTEC demonstration model.
The world’s first OTEC pilot plant was situated in Nauru. Below is a two part video describing the work that Toshiba did to build and operate this OTEC plant. To read more about the Nauru OTEC see the document: Outline of the 100kW OTEC pilot plant in The Republic of Nauru (PDF, 1.8Mb) from the OTEC Library.
There are a couple of OTEC videos available on YouTube. The first one is a nice old one about the US Mini-OTEC which was built in 1979, at the end of the film there is a more modern piece added on about how OTEC systems could be built today. The second one was produced by OCEES and is a corporate presentation. The third one is presentation about OTEC for Puerto Rico by Offshore Infrastructure Associates.
Understanding the challenge of moving away from fossil fuels on a global scale can be hard to grasp. Professor Nathan Lewis, at the California Institute of Technology has a very good presentation called “Powering the Planet: Where in the World Will Our Energy Come From?”. This presentation from May 2005, is available online in video streaming format. You can read a summary of the presentation and download slides and a separate audio track here… Continue reading