TEDx Talk Hydraulic Hydro Storage

thank you for that introduction yes we have a interesting situation today our energy system is outdated it's all about combusting oil and coal and we produce a lot of carbon dioxide so we have to change we have to change to a renewable energy at the way to renewable energy there's one big block on Feraud that's storage and so we have to understand what's going on in our world now the first thing I want to tell you is that voter voltaic is a very unique thing if you look how fast this technology is growing between two major lines there is a factor of 10 this means crossing a new line ten times as much Vodafone takes we start in the early 90s there at that time the United States was a leading country in PV installations the whole world had about 100 megawatt then the Japanese came in they had a strong program it was growing and growing in the beginning of the 21st century Germany started really fast growing and since then we have now cover two times the line and I have learned yesterday that we now have covered the next line we are now beyond for 100 gigawatt hours of electricity coming from Vodafone Ickes that is a great thing and we have to look into the future what will go on I'm not quite sure if the line is always that steep as it is now but maybe we have an annual growth of 30% that is not unusual in economics then within the next decade we will see that our global demand could be solved by voter voltaics now now look again today in our world 0.5% of the electricity is coming out of photovoltaics that seems to be a real small thing but I have an even smaller number for you it is 0.003 this was 1998 and if that goes on in the year 2028 15 years from now we will have 50% half of our energy coming from photovoltaics that's great now the interesting thing is that it's not only a thing that happens in Germany Italy was for country with the most installations 2011 India has four largest photovoltaic site of the world of course Germany has most of the rooftops with solar china has most of a production capacity and United States have highest efficiency and in leps that means that silica roll over bright day for our photovoltaics but there is a problem we have the problem at night we have to solve that we have to solve that problem and we have to understand that problem then we can solve it now what I show you here is let's the demand of electricity in Germany other countries are quite similar in the early morning in fact night the demand is low then the Sun rises people wake up but new computers I have learned and then the demand arises and peaks at lunchtime and then it goes slowly down in the evening month of office going to bed now to close that gap conventional power was always produced in such an amount that it exactly matched that that is great but you need this storage in the way of coal and gas and so on now Sun comes in if Sun comes in it comes always during for day and it releases the situation we don't need so much energy at the daytime so we don't have to store during night for the day but we do in a moment and now more and more Sun is coming in within the next year's what will go on there will still be no energy in tonight but at the day we will have a lot of energy and we have even more energy when we can use so we have to waste that but if a graph is going on we have so much energy that wasting that energy is not a good idea and we should store that energy and use it at night time that's the basic idea now storage is available in Germany our storage capacity is about a half an hour that's all not more ok so what we need is storage and now we have to build a cheque card and go into what do we really need we need low price for a kilowatt hour storage capacity for reason is otherwise it's not economic and if it's not economic it won't work the next thing is we need high efficiency because people use all this electricity with quite expensive things like motor voltage or wind turbines and we want a small footprint all this change to renewable is about environment friendly stuff so our storage should also be environmentally friendly so first guess battery great thing we use it every day but the low price thing is not here battery is about 2 though $200 per kilowatt hour and they are already in high scale used every car has this battery so there won't be a big change in the future small footprint is also not here reason we need metals during mining we have problems with the environment during disposal we have problems with the environment so batteries are difficult if I have one thing and it's clear that is high efficiency we have about something like 90% that's great but to showstoppers then there is an interesting idea in Germany that says we take our electricity and make guess guess natural gas is very known we have a big infrastructure we have storage systems so why don't make guess from our electricity no the price is low because for infrastructure is already here the point is efficiency we have to convert for electricity into hydrogen then we have to convert the hydrogen into methane and then we have to convert that tech to power electricity and only 25 percent are here and 75 percent are lost so it's a new way to waste energy now yes it's really a great way to do that small footprint that's true there's one solution that is well known that is pumped hydro the idea is very simple we take water use an electric pump and pump it up fill and then if we need for energy we release the water through a turbine and the energy is coming back to us that's great it's so low price that 99% of all storage systems in the world are pumped hydro so that seems to be interesting it has high efficiency of about 80 percents of Energy's really coming back that we put in there that's one problem it's a not a small footprint usually we have an uphill passage and that is usually the area where people in dense populated areas want to make holiday so we can slot it otherwise the communities don't like it so now that doesn't work okay now come to my new idea the idea is very simple instead of pumping the water uphill we pump the water below the hill and the lift for hill and the question is doesn't really makes sense hydraulic hydro storage know how to build something like that so look into the ground in fact Ron Ferriss always rock material and now we look into that and we tick down a shaft and then we dig or drill to tunnel systems and then we drill a lot of holes into the surface and this holes are necessary to guide our sawing strings and the sawing swings are cutting for rock as it is always done in like very well you are used to this cutted car night or other things and then you can lift it oh you don't have to forget for owing otherwise it won't leak it that's not a good idea so now we can lift it okay to understand that and now comes really late evening a very difficult part is how does this really work and does it work out cheap and the point is if I take a cylinder the radius and the height of the cylinder is just a diameter so two times for ideas then I can lift it up to R that means I can't lift it higher otherwise it gets stuck that's not a good idea was a mountain we don't do that so the final thing is now we have to calculate if you remember some stuff from meth it is some famous volume is something like R to a third power and sizes are so combining that we can calculate for storage capacity the energy is proportional to our gravity to the mass and / - of it okay that's everything now we have to introduce that that's very simple in our quick PowerPoint and now we see with some more calculations it's to the fourth power and if we build it then the interesting thing is building is not to the fourth power building is only about talking about the surface we have to cut the surface and that is second power combining that means that the cost of the kilowatt hour storage capacity is going 1 by r square ok this was a little bit hard stuff for this evening so I say it now in a fairly simple sentence double for radius and the price goes down to a quarter that's the idea double for radius press co-star that's unique that's really unique now the the point is can we build something with this height now that 80-meter here it's really wonderful in the ocean it's 80 meter absolutely vertical over there 300 meter vertical that works with rock nature but let's not friend going to another place there's a waterfall and waterfalls like to fall vertical and so it's 1,000 meter vertical then the reason why Nature doesn't still show us too often this type it doesn't cut rocks in that way that's the reason so we have to cut it we have to seal it ceiling yes we have to cover it with some geomembrane and some blessing and we have to put some metals there that 400 rings are sliding smooth like technologies and we can look into that and we can see that if we have this o rings we have not only 100 ring we have a lot of over rings and every of this o-ring keeps 10 bar 10 bars is a pressure and the wire of a truck that's absolutely standard in technology let's not big deal and you have to operate it now what we are doing is we collect the electricity from over production this electricity goes into the ground and we use our pump the pump is pressurizing for water belief and now it is lifting the rock and is lifting and lifting and more and more energy is going into this rock and now in the evening and the moon is coming which doesn't happen here then we can play back the electricity 80% is coming back to correct and we can use it when we need it so that means we have now an interesting way to store energy and not a business yes there is a business model the business model works very simple buy cheap buy cheap means during day time if there is overproduction cheap electricity is there if there is overproduction of wind energy cheap wind energy is there then you have to wait until the production of power by voter fatigue oven is below the need then people are asking for power and they will pay you more than you had to buy so that is buy cheap sell expensive the next thing is storing energy will be a big business today it is not because we have not we have 0.5% photovoltaic site not a big business what happens is here for example this 500 meter rock if it is one time lifted it has that much energy in there that if you sell that energy you earn 160 million u.s. dollar that is the amount of energy in this rock and you can lift it many times and every time you learn that money until you have earned that much money as you had to rent for building that now we have our checklist again low price per kilowatt hour yes why because we have won by our rule that tells us we can go down to something like a few dollars per kilowatt hour storage capacity a hundred times less than batteries high efficiency of course because we have the same technology as pumped hydro and they have 80 percent so it is definitely for best efficiency we can have small footprint we don't generate radioactivity or chemical spills or metals now we don't generate any waste because for rock was always fair and will stay there we don't move this far away from that okay small footprint today we see that photovoltaic is coming in wind power is coming in and if we can combine this renewable energy the storage we can produce clean and sustained will energy in the future thank you for your attention

Channel: Eduard Heindl

Views: 96,912

Rating: 4.6476045 out of 5

Keywords: Storage, Speicher, Photovoltaik, power system, Erneuerbare Energien, Lageenergiespeicher, pumped hydro, Energiespeicher, renewable, phs, Solar Energy (Industry), Stromspeicher, Solar (album), Batterien, Solarenergie, Granit, Batterie, Energie, Eeg, solar, Erneuerbare, Energieen, wind power, Wasserkraft, storage system, Windenergie, Energy, Pumpspeicher, Regenerative Energie, Environment

Id: m3p_daUDvI8

Length: 15min 42sec (942 seconds)

Published: Thu Apr 11 2013

Reddit Comments

[u/ispeakswedish]

Would't this mean you would drain a lake at daytime and create a potential hazard by lifting a rock 500 meters into the air?

[u/Iamadinocopter]

Small footprint? for lifting a mountain?

[u/Angry_Geologist]

The presentation is a bit rough, but I like this idea. Though it does have quite a few issues.

I much prefer a chemical solution to energy storage, IE an ammonia system