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On Can Humanity Coexist With Rising CO2 Levels?

Hops, acidification is a big problem. Deep waters however contain far more CO2 than the shallower waters where most of the damage is being caused. It is when upwelling occurs that the problems with shellfish is most prevalent. As pointed out below you need to perform electrolysis to bring power from the best sites to shore. When you do this with a "Supergreen" process like the one Greg Rau's team developed then you neutralize the acidification as well. The TEC articleCarbon Sequestering Energy Production addresses this approach.     

February 17, 2015    View Comment    

On Can Ending Energy Poverty Abroad Create Jobs at Home?

Justin, OTECAfrica.org in association, whith the University of Borås in Sweden is about to publish a book, OTEC Matters 2015, at the end of the month. I have tried to make many of the points you put forth in this article in one of the chapters.


I hope you and interest TEC followers have the opportunity to read a copy after the release.

 

February 16, 2015    View Comment    

On Atomic Balm: Some Prominent Environmental Veterans are Talking up Nuclear Power as a Climate Change Solution

Answered question - nuclear waste disposal.

Amongst the few solutions to the problem described in Wikipeia are:

The subductive waste dispoal method - described as the most viable means of disposing of radioactive waste. and

The nuclear  assisted hydrocarbon production method.

Both invented here but unfortunately industry turned its back on both.

Possibly that has something to do with Wall Street's wariness.

If you won't use the most viable solution to your greatest drawback, your business model would seem to be more than a little suspect.

February 16, 2015    View Comment    

On National Academy of Sciences Report on Carbon Removal: A Recap and Commentary

"most carbon dioxide removal strategies have limited technical capacity, and absent some unforeseen technological innovation, large-scale deployment would cost as much or more than replacing fossil fuels with low carbon-emission energy sources," the committee said.

February 13, 2015    View Comment    

On Batteries Shmatteries: Let's Talk About the Biggest Type of Solar Storage

"The Biggest Type of Solar Storage"

The world's oceans, which are heating at the rate of two trillion 100-watt light bulbs burning continuously,

To a depth of 500 metres they are warming by 0.005 degrees C a year and 0.002 degrees between 500-2000 metres. Most of the heat initially accumulates in the top 10 meters and no radiation reaches below 100 meters. Diffusion is slow because the natural tendency of heat is to rise but mechanical action produced by wind and salinity gradients mixes some of that heat to deeper water.

Assisting this relocation with heat pipes, presents the opportunity to "constantly" produce as much energy was we currently derive from fossil fuels.

In other words we can power real light bulb, transportation as well as heating and airconditioning with the heat that is otherwise destroying the planet's ability to sustain life.

February 9, 2015    View Comment    

On A New Theory of Energy and the Economy, Part 2: Showing the Long-Term GDP-Energy Tie

Willem, it is in the link. The only resource on this planet that is increasing is heat at the oceans surface, which accounts for the bulk of global warming. This accumulation is damaging to the environment. The safe movement of that heat to deep water can produce as much energy as we currently get from fossil fuels. The linked post describes why this manufactured energy can have one of the lowest levelized capital costs.

February 9, 2015    View Comment    

On The Lowest Cost Renewable Energy Comes With a 2000 Percent Environmental Dividend

Alistair I am in full agreement the economics and physics have to be tested before very large scale - 1 gigawatt, multibillion dollar - plants can be considered. One of my colleagues has proposed two stacked tanks of about 4 meter diameter and 5 meter height, representing the hot and cold heat sinks for testing of a small 1500 watt system. This would then lead to a small ocean test and a 100MW plant once the techno-economic issues are worked out. A hundred megawatts is considered the smallest size that would be economically viable. Your coal mine is another option for initial consideration of the technical questions. Testing is on going for cold water pipe designs like Makai's effort but to the best of my knowledge the heat pipe has never been tested, and as you are aware this is the one I believe provides the most environmental benefit and at the lowest cost. I am actively seeking funding for the initial efforts in this regard.


Many thanks for your interest and suggestions.

February 7, 2015    View Comment    

On The Lowest Cost Renewable Energy Comes With a 2000 Percent Environmental Dividend

Yes WE do SL and legal counsel is a vital component of that effort.

February 7, 2015    View Comment    

On The Lowest Cost Renewable Energy Comes With a 2000 Percent Environmental Dividend

Alistair a couple of colleagues are very interested in salinity gradient solar ponds as a way to jackup the efficiency of these kinds of systems. You can google them and and get all kinds of hits. They can get the temperature differential up to close to 100 degrees as I understand it.

I am kind of a purest and believe there is more than enough heat in the oceans already causing us grief and that simply relocating the worst of it into the deep would solve most of our problems.

 

 

February 6, 2015    View Comment    

On The Defeat of Climate Denial

"The policy debate will now shift from a discussion of the existence of the problem to one focused on solutions."

Hopefully that will be the case. In that event the potentially least cost energy solution, with the highest rate of environmental return stands a reasonable chance.

February 4, 2015    View Comment    

On The Lowest Cost Renewable Energy Comes With a 2000 Percent Environmental Dividend

Robert, most of my associates prefer ammonia as the energy carrier. I don't know which is the best way to go. My main interest is in coverting warming heat to productive use. It seems to me though the auto industry has made a committment to hydrogen, where I don't see the same for ammonia, so I would think that would be the way to go. No doubt avoiding electrolysis would be more efficient but the best OTEC sites are pretty remote.

February 1, 2015    View Comment