OTEC News - Clean Energy, Water and Food |
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The news source for Ocean Thermal Energy Conversion (OTEC)
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Thursday, November 23, 2006
Reverse Osmosis vs. OTEC
 Dominic Michaelis the co-designer of the Energy Island OTEC platform concept, together with Jerome Tomasi have written a paper which compares the costs of using reverse osmosis to make fresh water from seawater with the cost of doing the same with an open cycle OTEC plant. This comes as the Perth opens the reverse osmosis plant described in the paper. Perth is to "stop the total sprinkler bans in Perth and south west W-A". They will water their lawns suffering from climate change, with water produced by electricity, from a coal power plant most likely, which will cause more climate change... Friday, November 17, 2006
Fish farming good for fish in the ocean?
 As a reaction on the news that we may have depleted the world-wide fish stocks in 40 years the NELHA based Kona Blue fish farming company said that they have the solution to the problem: fish farming. But they are farming a carnivorous fish which means that approximately 3-10 times as much fish is taken from the sea to feed the farmed fish. You have a loss in protein in that chain. Until you farm the feed as well I don't think you can become sustainable in the light of collapsing fish stocks. That said, I think Kona Blue is doing better than most fish farms, but more work is clearly needed. |
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