The Pursuit of Wave Energy -- Brian Moffat at Mindshare LA

[@hujiaming6151]

Wow the whole project about tidal and wave power is awesome!!!

[@yanglungjieh8950]

I’ve surveyed and learnt a lot from your report about the GreenWAVE WEC. Recently I’m preparing MOOCs teaching videos and a Chinese textbook about marine technology, and I need to quote the GreenWave photo/video on your website into my textbook and teaching videos. This quotation is only for educational purpose but not for commercial benefit. Therefore, I asked your permission to use the above photo/video. I’m happy to sign any agreement of non-profit access. And look forward to seeing your positive reply. Thank you.

[@antonnym214]

Super impressive! -- especially, considering that you built the prototype at home. I love simple designs. I always say if engineers are smart, they can design something complicated, but if they are smarter still, they can design something simple. Well done.

[@jackasshomey]

If you can't explain it simply, you don't understand it well enough. ~Albert Einstein

[@Froggability]

Does the turbine go forward backwards forward backwards? Or blade pitch flips to keep the turbine constant?

[@edwardoquendo1902]

I thought that your presentation was very informational. As, it provided to me to some great concepts and ideas in that particular industry. I am going have a lot information for my speech on Renewable Energy Technology. Funny thing is that, I really had no idea that any of this even existed. Thank you for providing this material and opening my eyes to a larger perspective toward our humanity in energy conceivement.

[@moffatbrian]

+Edward Oquendo Hi Edward. I'm glad you found it useful. Sorry I didn't reply earlier. Since this video was posted by the staff at "MindShare LA" I wasn't notified of any comments. I tend to post updates on our progress on our FB page at facebook.com/SpindriftEnergy Best regards, Brian

[@gregorymalchuk272]

@@moffatbrian I am curious about the turbine itself. It looks a bit more like a Kaplan turbine than an impulse/Pelton turbine. Any other updates over the past 4 years?

[@moffatbrian]

@@gregorymalchuk272 Hi Gregory. The turbine in that design was a propeller turbine with bi-directional blades. We have been in stealth mode and things are going very well. I expect that we will come out of stealth in about 1 year.

[@rolliebca]

@@moffatbrian Really looking forward to you coming out of stealth mode! Time to generate some excitement and power!

[@have_a_nice_day399]

Great talk. What if a fish or sea weed get into the venturi tube?

[@jhketel]

What status does spindrift currently hold? Any full size installations in place and if not why not.

[@galaktozawr]

if you do not compress in a tube, and use the water to slow the ascent of the buoy, thus diving under a wave and using its ascent to the turbine?

[@stijn2644]

at 16:46 can someone explain why they think nuclear and fuel cells emit carbon? As far as i know nuclear does not emit CO2 when operating as with fuel cells hydrogen can't produce CO2 because there is no carbon to bond with oxygen to create it. If they mean lifecycle emissions yeah sure then they both emit CO2, but so do the other sources.

[@luckyshadowtux]

I'm not exactly clear on the design, is the venturi rigidly attached to the buoy, and is the venturi open to the water?

[@paulbertrand2759]

Yeah, I believe the venturi tube is rigidly attached to the buoy. Imagine you had a venturi tube with a turbine inside, and you were to move it up and down in still water, this represents the venturi tube at depth because the water is almost still down there.

[@luckyshadowtux]

paul bertrand but the venturi would create so much drag? surely it would be better to attach the buoy to some baffle system?

[@moffatbrian]

Ben Wilkinson Hi Ben. The Venturi tube creates a bit of drag, but not much. The only significant drag is created by the turbine in the path of the water flowing through the tube. And, although it is surprising, the speed of the flow doesn't decrease. What happens is that the accelerated speed of the flow through the Venturi tube is reduced, as it would have been any way. But it is reduced as a consequence of its collision with the turbine blades, instead of as a consequence of its collision with the already slowing water ahead of it in the tube. Therefore, instead of water crashing into water, and thereby restoring the original pressure to the water leaving the Venturi tube, the water crashes into the blades of the turbine and gives up some of its energy as it causes the turbine to spin. So, water leaves the tube at the same speed at which it entered, but it leaves with less pressure. "Lunar Energy Technology" (www.lunarenergy.co.uk/duct.htm) used to provide a nice explanation and illustration of this phenomenon, but it appears to be gone now. Here is an image of the pressure changing as water flows through their very-similar device: www.spindriftenergy.com/uploads/6/4/4/0/6440334/4533816_orig.jpg

[@NavahTsviEpstein]

+Brian Moffat If the 2 cent per KWH estimate for cost is even close, that would be an amazing advance. Echo Wave says they have a contract with Gibralter for a fairly large scale installation of 5 MW. Do you have any idea what cost per KWH is supposed to result from that proposal. Are they the same as what was once SDE?

[@moffatbrian]

+Navah-Tsvi Epstein Hi Navah-Tsvi, It appears that SDE has been purchased by a new company called WERPO. And, that company appears to be separate from Echo Wave. I agree that their technologies appear (at casual glance) to be almost identical. They are certainly very similar. I've searched, but I can't find mention of the anticipated cost of the energy that EW will produce. It is certainly easier to be cost efficient when capturing wave energy from a break water or other fixed wall (i.e. adjacent to relatively deep water). It's pretty convenient when your device can be on land, and your "energy absorbing portion" can still be in the sea. The downside of course, (which is primarily relevant in the long term) is that this kind of land:shore hybrid technology can't scale very well, certainly not to the same extent as one that can operate in the deep sea.

[@scaleneous]

Is this project still on?

[@walterdeintinis4972]

Hi Brian, Interesting video. However, where did you get that figure of global consumption of 2 TW? I would say, global energy consumption is way more than that. Thank you

[@primodernious]

the simple solution is a big fan running at low speed under water. the water currents will drive the fan and generate power at a few rpm. the generator need to be a low speed one and sealed inside the fan houseing. that will work better. think of wind turbine but under water. in water its the same just slower.

[@johill6863]

Do u have anything for a floating home/island to use along w solar? In Oak Ridge TN , part of DOE has a lot of wearhouse space and grant available they could possible help u.

[@showme360]

Great idea, just cannot see shipping avoid these devices, just imagine an oil tanker avoid these field of turbines under the water. I feel this type of energy capture is only appropriate on the shoreline.

[@capitalismblows]

Wave energy is vertical, best capture with floats driving overhead electric pumps (generators )

[@behzadutube]

Makes me wonder how you could calculate the price of production (to be lower than coal!) while you are still looking for someone to simulate it and a turbine expert...

[@jigold22571]

🙏

[@MrRasZee]

i like the barage generator

[@infocranleytech3518]

Check out this video kzbin.info/www/bejne/rF7Pe56bh62td6c (or short version kzbin.info/www/bejne/d3jCp61oq62Dba8) by cranleytech.com, there is some open water testing towards the end. It aims to get energy from the horizontal motion of the wave which is stronger in the near shore (

[@jeguim123]

how about if the professor try to use a Yankee screw with a buoy going up an down like the Yankee Screwdriver works

[@moffatbrian]

jeguim123 That's an interesting idea. My concern would be how well it would work if it began to corrode in the seawater.

[@jeguim123]

how about the stenless steel professor ?

[@moffatbrian]

jeguim123 Yes, there are versions of steel that resist corrosion. It's also possible to use sacrificial metals or an "impressed current" to reduce or stop corrosion. The use of a Yankee screw might work but if you were going to try that approach, I think you would end up using a "rack and pinon" instead. And, that's what "Ocean Power Technologies" (maker of the "PowerBuoy") did. However, they went bankrupt during the last year. So, I think that approach might work, but if you wanted to raise money to try it, I think it would be hard to get past the stigma associated with OPT's failure.

[@robvanderkooy1337]

you kan make islands withit conect them and make new towns on sea

[@ombundarculipsuri]

Let's not ignore the "friction" imposed by these systems against natural currents and water movement to sustein life and pass energy accros the globe! In other worlds: Are you forgeting that any system added to the volume of water increases the "friction", rezisting to the natural movement of currents and waves, affecting the weather?! The interconnection within the system or inter-system have an ageing process. Eventually abandoned or too complex to maintain, they become pollution and dangers to ocean life and waiste of men produced materials!

[@BillyBobsbrother]

The name Mindshare is interesting to me. I started an organization during the oil shortage in the 70's called Energy Idea Exchange. Which needed the internet, that Vice President Gore had not invented yet. The idea was that individuals could submit ideas, that could be reviewed by engineers, scientists, professors etc. If valid, prototypes could be built in small shops etc. We know people are motivated by money in such cases, but a lot of people are motivated purely by challenge and community need. People will go to great lengths for notoriety self gratification and to feed the ego There is a huge amount of untapped talent, but is there a legitimate and safe place to share ideas, get or give help for such projects. The alternate is, the genius cant afford the patent and does not have the connections, so his ideas do not become available and he hides them.

[@irchristo]

#solarinallitsforms

[@divinejustice536]

🌝

[@georgeivanus6697]

you can as help from guys like Bezos or Musk , why don't you?

[@antoniocarlosnunesmattos3083]

My projects are higher, contact me, thank you.

[@Ferelmakina]

Pelamis is a great system, no matter what this guy says

[@larryhooverpedofilekillerc4177]

Hello good afternoon thank you for being beautiful thank you for being wonderful I hope you have a great day. Good night greatness in you is beautiful

[@picobyte]

All the shown systems are very expensive and unreliable.Thats why it still is on the drawingboard.

[@tommirossi9919]

I kinda don't believe this. As they say, it' don't compute for some pretty obvious reasons.

[@robwyyi]

Farm. Where maybe in another country but not here. Again a ideal that will when submitted rejected and then blame environmentalist for end. Looks like the enthusiastic audience willy don't know how a coastal enironmental works. Kelp beds the natural fertilizer of coastal waters would be highly impacted. Kelp at the height of growth detaches from its roots then drift till they finally degrade. Fertilize the coast as they drift along the coast. Don't blame anyone but yourself when you write the NEPA and then get rejected. Probably,unless you hide some biological facts, will come to a end when you for research. Farm. a wind turbines farm found a way to work around NEPA, maybe this thing can too.

[@picobyte]

All the shown systems are very expensive and unreliable.Thats why it still is on the drawingboard.

[@robwyyi]

Farm. Where maybe in another country but not here. Again a ideal that will when submitted rejected and then blame environmentalist for end. Looks like the enthusiastic audience willy don't know how a coastal enironmental works. Kelp beds the natural fertilizer of coastal waters would be highly impacted. Kelp at the height of growth detaches from its roots then drift till they finally degrade. Fertilize the coast as they drift along the coast. Don't blame anyone but yourself when you write the NEPA and then get rejected. Probably,unless you hide some biological facts, will come to a end when you for research. Farm. a wind turbines farm found a way to work around NEPA, maybe this thing can too.