5 ms·
Nice, that's a cool scenario I hadn't thought of. I haven't heard of any deep sea wind generators, but obviously that might have great yields. I wonder if that
by tinco 4y ago
Nice, that's a cool scenario I hadn't thought of. I haven't heard of any deep sea wind generators, but obviously that might have great yields. I wonder if that far out at sea it wouldn't be easier/more feasible to have solar panels instead of wind mills.
- deleted 4y ago[deleted]
- deepnet 4y agoTidal turbines are a good contender. The tides are constant.
- onphonenow 4y agoAs someone who has spent a fair bit of time in / around salt water I’m skeptical of these claims. I want to see all in deployment costs with maintenance. Are these deep water or do they need to be shallow water where they will be banged up even more in storms etc
- dncornholio 4y agoI don't know about tidal forces, I do know in the Netherlands they create energy from salt / fresh water dialysis. https://redstack.nl/en/ https://redstack.nl/en/
- jcampbell1 4y agoTidal turbines are viable in inlets where currents are consistently strong during tidal changes, the problem is they often disrupt the ecosystems around where fish need to spawn. Altering the total water flow into estuaries is sketchy and the good places are typically shipping lanes. You could put them in a place like Gibraltar and live with reduced water exchange in the Mediterranean, but it will be met with a lot of resistance. Ideas that rely on moving a mass up and down 10 feet every 6 hours require floating platforms the size of Rhode Island. Not cheap to build. Neither strategy is a contender in my book. I recall a research project in France which the results were unappealing. The environmental costs were high and power generated was low. You have to be careful getting scientific knowledge from the mainstream press or researchers who need to sell their research which means it is more akin to marketing than scientific knowledge.
- moloch-hai 4y agoAttempts at tidal power extraction in the Bay of Fundy have failed because the turbines broke, every time. Attaching a simple float to a cable and pulley turning a generator onshore seems not to have occurred to them. Numerous (i.e. all) wave energy startups have likewise gone bust trying to keep machinery working exposed to maritime weather. It seems never to occur to them to keep the stuff that would need attention onshore and indoors.
- chr1 4y agoUsing [1] temperature difference between deep water and surface water may be even more efficient [1] https://en.m.wikipedia.org/wiki/Ocean_thermal_energy_conversion https://en.m.wikipedia.org/wiki/Ocean_thermal_energy_convers...
- moloch-hai 4y agoYou can bypass the heat engine, and just condense humidity onto coils with cold deep water running through them. You only need an insulated pipe to bring the deep water up through. The more water you move, the less insulation you need.
- semi-extrinsic 4y agoOffshore wind is proven tech at this point, to the point that there are commercial offshore wind farms that have been built without any subsidies. Mainly in Europe but starting also in the US. There is no major R&D necessary to make it happen, just scaling and cost engineering. The Biden administration target for 2030 is to have 30 GW installed generation capacity in offshore wind.
- tinco 4y agoYeah but none so far away that you couldn't just lay a cable to transmit the power to the shore.
- jcampbell1 4y ago> Offshore wind is proven tech at this point Shallow water only. The North Sea is perfect, the east coast of the US looks good in places. Deep water is unproven currently and in the R&D stage with no known economically viable solutions.
- moloch-hai 4y agoMajor construction projects are ongoing, based on already proven solutions.
- canadianfella 4y ago
- jcampbell1 4y agoBullshit. Best so far is Hywind, which is 3x the cost per MWh of shallow offshore.
- MisterTea 4y agoThere is also https://en.wikipedia.org/wiki/Wave_power https://en.wikipedia.org/wiki/Wave_power