Ocean Thermal Energy Conversion ( OTEC ): The Future of Baseload, Dispatchable Renewable Energy

[@glaycer5694]

Thanks. Ocean Thermal Energy Conversion (OTEC) is on my test (Environmental Sciences). Please leave your video posted. It was helpful.

[@aresivrc1800]

Very impressive. I hope we can build more of those plants in the future.

[@cvapr]

These are the iniciatives that gives us hope for a better future!

[@simontate1382]

if you add a heat grid on the inbound hotline just like a solar hot water system you could increase the output during the daytime. you could also do some of the cooling by putting the return pipe into the ground.

[@WayneJohnsonZastil]

I thought putting pipes in ground warms water!

[@RobbyBoy167]

putting the pipe into the ground just reduces the possibility of gaining heat from the air/sun but doesn't really increase cooling. Based on their pipe sizes I'm guessing that won't make a noticeable difference. The heat grid is great but adding it would then be whether it's necessary. Adding it gives extra cost in construction and maintenance. Will it improve the ammonia and overall systems output via superheating or will it just be a redundant addition to the system?

[@tankahchoon2723]

​@@RobbyBoy167from the start adding a heat grid would that reduce the result that it should for the expectation from the designer？

[@harshitha.n2941]

was studying my engineering subject 'energy engineering' . there was a topic about otec and I have exams in few days so it was helpful thank you and I'm really inspired

[@dhananjays8087]

Harshith a.n vtu na

[@harshitha.n2941]

Suresh Singhi howdu 😝

[@josephomole6404]

We were taught otec in our final year in Mechanical Engineering University of Lagos, Nigeria... loved it

[@yassinerhatous3657]

Hi Joseph

[@manishkumarsingh1951]

This is one of the most coolest thing i have ever seen..

[@adetayoadeboye4811]

Sooo cool, I really appreciate this

[@TheDipankarrai]

thank you....was trying to understand otec since last couple of days.

[@corgraveland4874]

Looks great and promising, what are expereiences after running it for several years, what is the current status as of Januari 2021? Thanks!

[@ConnorNolan]

I just heard a video about how they’re using it to power the new manta ray drones

[@dudewhatthehellman]

Please someone tell me why this isn't feasible before I get excited.

[@RattlerSnake]

What's the price for electricity made there now?

[@tankahchoon2723]

what a beautiful world we had incredibly awesome

[@edwardcrivera]

Can anyone tell me what the name of the device he is holding at 3:24 ?

[@yashadattsawant2380]

very helpful to understand OTEC thanks

[@justdvl]

Wouldn't this in long run increase the temperature of water deep down from where they pull cold water?

[@tomkelly8827]

This is amazing! I am so glad that you are doing this! I would love to hear more about your efficiency in this system. It seems to me that the greater the temperature difference the greater the power output. It will certainly require the optimal liquid to boil and condense in the loop. I guess colder water means less pumping for the same amount of electricity right? This system can be coupled with solar farms, wind farms, and wood/refuse burners to provide additional heat or power as well as clean input for pumping.

[@WayneJohnsonZastil]

2% efficient as of now

[@WayneJohnsonZastil]

But thats 24/7

[@hamishwheatley7505]

Interesting stuff ! Is there any net cooling effect to the sea water ? With the rapid destruction of coral reefs, do you guys have any research on the go that really pulls heat from sea water to generate electricity ? Kind of like a geo thermal system, but in the ocean instead of in the ground ? it seems like an exciting concept to me but I do not see much on the internet talking about it ! Surely the escalating heat in the worlds oceans is like a vast battery waiting to be harvested ? Would love to hear back from you !

[@landonsugar1085]

What's the glass structure called that he's holding at 3:25?

[@WayneJohnsonZastil]

Look up bobbing duck bit like that!

[@ronikhatri4020]

Can we try heating water by greenhouse effect by placing a wide floating rectangular glass cube on sea surface allowing the water to pass through its any two opposite side by giving a big slot in it? By providing glass with same property of that for solar collector which transmit the solar radiation and prevent the reflection of water back to the atmosphere or by painting the back side of glass black to heat the water in contact. It should raise the temperature of water. This water is then supplied as warm water to OTEC plant and the same place would be occupied by water around it and heat up. Well yes, this would only work during day time but at least we can increase the performance during the daytime. Is it feasible?

[@antoniolima1068]

a updraft tower, water can storage great ammounts of heat and the watre vapor could be condensated to produce clean water.

[@Athenaikos]

Wow! What an idea!

[@unhommequicourt]

with what energy you pump the cold water?

[@luislaracuente]

+Franck Nicolas My guess is that they use the kinetic energy from waves. The floating structure goes "up and down" according to the waves, and serves as a sort of piston. Obviously this might not be enough and extra energy have to be used to run the pumps, but this is the case of all power generating methods. At the end, the purpose is to get more energy than the one that is being used to work the generator.

[@unhommequicourt]

Luis Antonio Laracuente after a few searches i ve found that they use the energy produced to use the pomp, as it needs fewer energy than the system actually produces

[@richardphatthenguyen195]

Just like most power plant including thermal solar, coal, use fraction of the energy produced in order to power their high,low pressure pump.

[@tomkelly8827]

Electrical energy just like oil and gas pumps.

[@Muxik4k]

Pump energy

[@sachinkamble2619]

Very nice idea...but i heard its efficiency is very less ...around 2-3%....is it true?

[@beback_]

Yes, considering the energy it needs to operate, it leaves you with 2-3%. But that wouldn't be a problem since the input is completely free

[@scott98390]

How do you re-condense the anhydrous ammonia, whose boiling point is -33.34°C, with deep seawater that is only around 0°C?

[@scott98390]

Dee J So that would be even less efficient. Can you actually answer my question?

[@simontate1382]

+Scott Baker you are generating electricity so to get the differential i can't see why you couldn't use the ammonia in the storage tank as a refrigerant, thereby doing half the heating process in the recooling process.

[@scott98390]

Simon Tate Absolutely! Why not?

[@pischaisundar1288]

+Scott Baker did u got the answer? how can we condense -33°C ammonia using 0 r 5°C water.any pressure variation.

[@pischaisundar1288]

Scott Baker

[@matthewhenley783]

I wonder if a Sterling engine would work well in this application. All you need is a temperature difference to make it run.

[@mindpuzzle81]

Has anybody did a nutrient study on the water discharge from tail end? Curious if the nutrients in the discharge water are high enough to act as a fertilizer on the phytoplankton within the ocean surface.

[@antimaga856]

It's the same sea water that was withdrawn from the ocean in a closed loop cycle. Nothing but heat is added or removed.

[@TheToxicReverend]

Could the OTEC system be modified to absorb excessive heat from the cooling towers of Nuclear Power Plants and or the spent fuel rod storage pools ? Such a system MIGHT have a Return On Investment and MIGHT be able to power a safe shut down in an emergency with or without diesel generators. All of which can present some very real problems and the OTEC may very well be a viable solution.

[@CarlsonRiggs]

You wanna do what?? Lol u have no idea what youre saying. Lol it either has to kick energy ass or it has to.go, got it?? Lol

[@intersections2428]

Will it work in Lake Erie?

[@liamwinter4512]

Wouldn't this work with any heat source?

[@aotq]

Yes it would. The sun is free though, and the ocean serves as a huge energy storage.

[@beback_]

You always need a heat sink as well.

[@mafarmerga]

What sort of surface water temperatures do you need? Sounds like this might work for Florida but not for North Carolina.

[@tomkelly8827]

It should work in both place just more cost effective in Florida. It seems like the difference in temperature between hot and cold water is most important

[@gilian2587]

Neither areas are considered ideal target areas. The areas of interest are the warmest surface temperature tropical waters.

[@ireneelisabethhitchcock1365]

I LOVE YOU!!!! That is the most brilliant engineering. Now from Greece to NZ, please. In NZ the water temperature difference is not as substantial. How would it work here? Does the pumping action interfere with the local seabed? How do you generate a safety radius for marine life to avoid the dangers of suction? So may questions...

[@WayneJohnsonZastil]

Does not work there unless find better liquid than amonia at evaporating

[@68404]

But how much power is being created?

[@todaysreality1575]

The entertainment use to pump water into the system is more that it produces

[@philoso377]

We are second interest with the principle of operation. We are more interested about the theoretical available kWh output per m^3 sea water at what input kWh.

[@safaamalik898]

thank you very much, I will studing about OTEC, It is an interesting project.

[@daborshy4089]

Is rotating a turban really the most efficient way of extracting work from this system?

[@tintifax74]

realy great idee... :) green power

[@chandrasekhar-gf9iw]

thanks a lot for your video and information

[@suharsh96]

Stunning! Thanks

[@gregthomas5699]

Fantastic!

[@ishaaqmohamed8788]

less electricity bill happy to hear 🤟

[@edster9876]

Does anybody know the efficiency of this system? I assume the energy produced is relatively small in comparison to the energy used?

[@HarryHoppins]

+Edward Bignell about 5%, Difference in Temperature is limitating

[@edster9876]

+HarryHoppins thanks! do you have a source for this? I guess with efficiency at that level then operating at a very large scale is the future for this system..

[@HarryHoppins]

it's more like carnot's theorem for a Delta T of 20 Kelvin. 5% would be the absolut upper limit. If the Heat Exchangers transport all of the Heat into The working medium. I Guess there would be plenty of losses through friction end and pumps. I Guess 2% would be more realistic.

[@edster9876]

+HarryHoppins I mean the efficiency of the system rather than the efficiency of energy transfer

[@callyama]

wait can someone go into this idea more (but in newbie terms)?? I am super curious about the viability of this project but I had the same question/concern - in this particular case, not being super efficient brings what kinds of problems???

[@mrigankashekherbhattachary5571]

awesome video.. thanks

[@stevemickler452]

The best benefit may be bringing up deep nutrient rich water to increase bio productivity to counter climate change. OTEC plants far from shore in the unproductive areas would make money by making ammonia out of nitrogen from air and hydrogen from the fresh water made. We caused the CO2 problem by burning ancient coaland oil we brought up from underground; now we can cure it by bringing up ancient nutrients that have been lying unproductive all these years.

[@CarlsonRiggs]

Far from shore means more energy transport lol get a clue

[@stevemickler452]

DC power lines are an option that could be practical especially if many OTEC units are combined.

[@Athenaikos]

Just a silly question: Could this work for Greek islands which are disconnected from the mainland grid? Or the Mediterranean waters are too shallow to provide the temperature differential needed for the conversion? Can we do it in Santorini?

[@simontate1382]

+Dean Plassaras you can use the ground to cool the ammonia to around 10Deg-C and a simple refrigerant system to do the rest.

[@drmodestoesq]

Just put a long concrete pipe out into deep water. A lot of coastal communities on the planet don't treat their sewage they just pipe it miles out to sea in giant pipes. Same principal, just get a pipe to bring deep seawater in.

[@gilian2587]

What is the $ per kWh value for the onshore OTEC facility? What is the projected $ per kWh for the 100 MW offshore facility? Are we looking at something around a 95% capacity factor for this idea? Would this be purely baseload power, or is load following possible?

[@wahidixewahidixe1187]

Why they not more build otec power plant?

[@Nick-nr6wd]

wahidixe wahidixe there's an economic issue as coal and nuclear energy are still a cheaper alternative. The power plant needed to create a reasonably powerful OTEC power plant (let's say 50mw) would be emmense. You'd need multiple turbines, heat exchangers and pumps. Let alone the pumps would have to be huge moving tones of water. It is feasible, but only until the world is ready to move to eco-friendly energy sources at the cost to higher prices. These OTEC power plants would only be useful near the equator where there is a big enough change in temperature of the ocean to make reasonable power.

[@joannot6706]

The music isn't loud enough. Make it even louder next time

[@crmlgnzls]

Does anyone know if they conducted an Environmental Impact Assessment/Statement for this specific plant?

[@claire_082]

where does the used surface & deep ocean water go? why do you guys separate the surface water into three? I didn't understand the explanation..

[@edster9876]

+Risa Toyama It's a testing facility, splitting it into three allows to test different components simultaneously so they can learn about creating more efficient systems I assume.

[@mugiraharjo6270]

You forget to tell to us. About generator power capacity, and pump power consumption.

[@gilian2587]

Their onshore prototype has a Capacity of 100 kW.

[@gawni1612]

this is cool af.

[@jvon3885]

How much horsepower per acre?

[@jvon3885]

Also imagine having listening to Tesla back in the day and ignoring the idiots who like to suck our hearts joints dry. Man humans are just greedy idiots. But that's besides the point. We seem to learn from mistakes and only try hard once we are faced wit dilemmas.

[@JocaSchz]

Does anyone knows what software they used to model the system, i would like to do one myself.

[@jortiz1451]

There are so many ways to get free electricity however, just go ahead and try giving away those system ideas to the public and will find out what Tesla found out when he came up with just one way to do it.

[@vladimirnachev324]

I just get two aluminium radiators connected with insulated hoses held in the water with chains and the very turbine is put in a water proof vessel on the very top just above sea level it can be regulated and even changing the liquids depending on the season of its really cold and it drops -5 surface warmth you can easily switch the liquid or just regulate the high of the evaporator and condenser when the heat sinks are totally immersed in the sea there isn't any energy losses for the need of the water pumps and the heat that runs out from the pipes

[@tsalatsaarifin9972]

Thanks for information in this movie. I think OTEC technology very potential in Indonesia. I hope we can implementation this technologi in Indonesia. Any help me can information spesification technic and calculation efficiency this technology ?

[@TJLINA]

Hi, I have a question. Seems like in general, the temperature difference between warm surface water and deep ocean cold water is about 20°C. How would be the efficiency or performance different if the temperature difference is higher than 20°C, let's say 50°C or more?? would that be more efficient??

[@tomkelly8827]

Absolutely, that would require much less pumping of cold water for the condenser.

[@Tamizushi]

The theoretical maximum efficiency you can get from a thermal power plant is given by the formula 1−TCold/THot×100%, where tCold and tHot are the temperatures of the coolent and the warm fluid respectively in kelvin. In addition, wider temperature differences means there is more energy to begin with. What this means is that every times you double the temperature difference, you also roughly quadruple the electricity produced. Considering that, OTEC uses thermal energy very inefficiently, converting only a few percents of it into electricity (theoritically 6%to 7%, in practice more like 1% to 3%). The way to compensate it is by using a very large volume of water. If you have lots and lots of warm water and you only extract a small amount of its heat energy, you can still produce a decent amount of power from it. With that being said, if you wanted to heat all that water to 50 celcius or more, you would need a pretty huge source of heat. You would be better of using that heat in a traditional reactor where a smaller volume of fluid is being used. You will get a lot more energy this way.

[@MagutoKibetTyson]

l will bring this to Africa in Jesus Mighty Name.

[@avecka]

What type of turbin is it?

[@maxdali1]

Analogy: Reverse the Refrigerator, or the Air Conditioner, closed cycle process. Water at 4 deg C is densest and sinks in the ocean; while the surface ocean water follows the thermal energy absorption pattern..

[@tedrees5989]

Heat engines have a maximum efficiency limited by (Thigh-Tlow)/Thigh, where Temperature is in Kelvin. But, practical heat engines have about half of that efficiency, because of the cost of the heat exchangers. Pick some numbers, suppose the deep water is at 32F, and the surface is at 80F. That is 0C and 27C, or 273K and 300K. The maximum efficiency is 27/300 = 9%. The maximum practical efficiency is about 5%. The power available is 1 cal/gm-C, or 27 x 1e6 x 4.184 = 31.38 KWH/cubic meter of flow. But only about 5% of this can be harvested or 1.5 KWH/cubic meter of flow. That is still a lot of energy. Has anyone made a prototype?

[@pezhmanetemadi7379]

great

[@davidedelzingaro7524]

❤

[@meetgeniusprakash]

wow

[@kanti12us]

We are still waiting for your dream!!!???

[@shreyasaha199]

😍

[@DavidWoroner]

I would prefer to say I do not understand. There are a bunch of 2nd Law problems that are not answered. I realize this is supposed to be an intro to non-science types, but .... when youre "making energy" there are so many quacks out here. Using your own power to pump the loop? Using the temp differential, and import/export the anhydrous (*anhydro-does not like water).... Its not clear. < (*psst, did everyone go drinking last night?)

[@ticomineiro7894]

+David W, it indeed need further details about the pumping energy (is it profitable?). About the ammonia: it does not get in touch with the water, they are in different tubes on the heat exchanger. My biggest concerns are related to the ocean itself: what about the marine lives that depend on that water zones?

[@ticomineiro7894]

+Dee J, that's what I said: "it does not get in touch with the water, they are in different tubes on the heat exchanger."

[@edster9876]

+Erivelton Campideles There may be local alterations to the community structures at the exhalent area, but in the grand scheme of things I cant see any major implications being unable to be overcome.

[@edster9876]

+Erivelton Campideles An interesting idea has been to utilise the nutrient rich deep waters for use in algae aquaculture.

[@tomkelly8827]

They are removing heat from a substantial amount of seawater. That is energy. It also takes energy to pump oil and gas, then move it, refine it, move it again then again and again until you can use it. There are no violations of second law, unless the water gets returned to the ocean as hot as it came out.

[@heresteven]

someone told me that the project is net negative on power. Is this true? Or is this another individual who doesn't know what he is talking about and bad mouthing a proven technology.

[@richardphatthenguyen195]

Which otec project?There are several Otec power plant some of them are new and some are old, ranging from kW to MW. Efficiency is dead low, that is true. But then you don't pay for the heat source that is provided by nature.

[@heresteven]

Richard Nguyen They were talking about the current project at Hawaii. But I remembered that the first plant there was making power. The critic was talking bad about OTEC because it was brought up to use the waste heat from the power plants and OTEC to generate electrical power. The cooling water from the power plant runs around 120F before returning close to ambient temperature. Some plants are located where such a combination looks promising.

[@richardphatthenguyen195]

Ah, it's just the guy saying the plant main goal was to study heat exchanger, not to produce power. So I would not be shocked if they had negative net output at first. The way he spoke in the video somehow imply a net positive output.

[@heresteven]

Richard Nguyen Yes. But a top executive for a big corporation was there opened to hear about new opportunities for the company. And one person's opinion shot down this down.

[@ishaaqmohamed8788]

well well well you know why not ?

[@Saadkhan-xh5sb]

What is up with the background sound track !! its like independence day shit track

[@chrisking7603]

The need for reliable baseload *should* be making this kind of tech (and geothermal) very attractive commercially... so how come we're _still_ waiting for commercial viability???? Why is it still preferable to excavate massive amounts of ancient trees, put them in massively long trains, and burn them in low-efficiency-to-steam-and-lots-of-pollution power generators? Oh well, must be economics... not foresight.

[@LOlOl-ee5xs]

Anyone come for the anime? lol

[@TheToxicReverend]

Ocean Thermal Vents electrical power generation kzbin.info/www/bejne/fGeQkIiKisSVgJI The Marshall deep-ocean hydrothermal vents System ​Website:> www.marshallhydrothermal.com Some additional Information in the comments, after the main posting at; plus.google.com/111485701979929741583/posts/S3ReniiUtnZ

[@madtscientist8853]

I'm gonna be honest Why humans constantly trying to make things more complicated

[@lorenzosaenz673]

Take a look at the followings videos: - ANACONDA Wave Energy Converter kzbin.info/www/bejne/p3eliGynqMmZq8U - ETYMOL 4 MW Wave Power Plant: kzbin.info/www/bejne/npyzYmOtaqaUkNU

[@donnadoriggins5236]

Wow 👏 you need to do more research 🙄 I only got a GED but I'm more verse on otec tech then this engineer. We've had the tech since 1851 some Dutch man invented it. The u.s. government has had 5-test plants in operation in Hawaii for 50 plus years. Also (the millennial project) Authored by Marshall T. Savage Gives a great break down explanation with diagrams formulas scale comparison the works. In the first chapter Aquarius. Everything in the book is science fact as of 90s tech. I will not go easy on bum science or engineer people who blantly copy others work while being so slow an uniformed on said topic

[@rahulash8295]

Lol 😂😂😂😂

[@ImVincent]

Cheeto

[@vladimirnachev324]

I have a way better model

[@drmodestoesq]

Do tell? Can it be elaborated in a KZbin comment? I'd like to hear it. But be prepared for brutal criticism from the techno-geek community. They don't pull any punches.