control of a 1000 square kilometers of russian territory in the south western course region. up next, it's planted a exploring the possibilities of storage, solar energy. i'm terry martin. thanks for watching the interest of what did you do to isolate the tenant she survived illustrates. thanks to music. he was the nazis favorite conductor, is more on the the genuine to musicians under the swastika, a documentary about this sounds of power, inspiring story about survival of the home. i did go get the tennis. i was the only

one who lives in nazi germany. watch now on youtube dw documentary, check out this documentary from the late seventy's. the light is converted directly into electricity. no moving parts. it's the perfect solar machine. people are fascinated by photovoltaic solar cells. it's just, they were outrages lea expensive. this is the biggest collection of photo sales ever assembled. it cost a quarter of a $1000000.00. it only produces enough electricity for 3 or 4 families. and that's what a rival technology came into play. large mirror us that's can also to in some beams, into electricity by focusing the light from the sun and using its heat. what you're seeing is the world's 1st commercial solar and electric power play,

and it's called solar one. concentrated solar power seems like the most promising solar technology back then. let's skip to today and it's been almost completely forgot the story behind it. this one of great expectations. your queen consistent and reliable energy. equally big disappointment that present doing this project failed and may be one of revival, because concentrated solar can do one very crucial thing that sold a sales cons. oh, you might have seen a concentrated solar power or see is p plants that looks like this before. especially if you into your hollywood, sy fi the sp tons can also look a bit less futuristic like this. but it's fundamentally they work the same way. they use a mirror, us to, reflects and concentrate sunlight, is simply, they could, i mean, did the sheet that, that is coming from this. i need,

this is chevy, a lot of who call themselves a csp evangelist. he's a mechanical engineer who has worked on many concentrated solar projects around the world, showed up on 17, i believe, a $1000.00 times designed united lucky bubbly. and this type of these plants, that particular point would be the top of the tower inside it as a fluid, purely molten salt, salt salt, and it's a liquid form that gets heated up by the sun's energy molten sold to spend compounds with generates up. that boils water to produce sleep, which in turn can be used to spend a turbine that generates electricity the same time that you can cause, you know, i'm not a small, uh, let's say the function by 1 o'clock. but we solve the problem even if you need function for after that's the sold has cooled down, so it gets pumped up, the towel and the cycle stops again. and for this process to work properly, you need a lot of direct sunlight, which is why you find some plants and countries like chile, morocco, the united arab emirates,

or india. but most of them on the hot pots of spain in the us. so why is it that when we hear solar energy, most of us immediately think of photovoltaic solar cells and not mira's, but concentrate sunlight. i'm old enough to remember in 2010, 0, so we will soup up domestic route solar at the end, the trees to generation to any chase is a solar analyst at the energy research from bluebook and yes, back then that, well, for example, big dreams to set up huge, concentrated solar plants and so far, um and since the electricity to europe via cable for a long time. so this type of was the main utility scale. so technology, however, what happened then was that it makes it up to 10 numbers. you got pretty cheap, and 1st of all types go super cheap. in a little over a decade, the price for electricity from solar photovoltaics dropped by almost 90 percent. there were a bunch of reasons for this main, the policy support in germany, which kicks out to the growing solar industry in china. we come with them in this video,

you should check out off of this. concentrated solar power also became chief talk about $102011.00 that started costing more than foldable takes today. it's more than twice as expensive. this meant people begin to turn away from it and put top ever cheapest solar panels instead. it wasn't so much that sold it, that will last. it was one of the physical size one. that is also because we've sold a family or concentrated solar. every single mirror needs to individually check the sense of movement. so they always direct the race to exactly the right points. and depending on the size of the plants, this could be thousands of mirrors. and then you have to account for clouts, which may block one part of the mirror of fields, but not all of it. that makes it hard to control the temperature at the top of the tower, which needs to stay within a fixed range compared to all this solar panels are just pretty easy to handle. when you put it on your roof or when you put it on the field or when you put another lake or wherever you put it, it's just very simple. this is richard, tony who's been researching, concentrated solar power technology and policy for the last decade. it's just

sitting there and have to kind of, maybe from time to time, but it's not operationally complex as csp where you have mirror that you need to adjust to, you know, under real environmental conditions. these plans are generally also custom built which makes them expensive. so in order to make them what that they need to be big, which means more challenging to engineer and handle a case of points. this make a project. welcome to the future of power generation, crescent dunes in the us state of nevada and was suppose to revolutionize clean electricity. because that will things $1000000000.00 to build. and when it started to run in 2015 expectations were high. and then the problems began. and never reached its expected everett's outputs, which was supposed to power $75000.00 homes also because there were lots and lots of outages due to technical problems often to do with the molten. so the plot used to most of so is a paid to work with because if something does go wrong and it drops below it, some,

it's melting point, then you didn't have both. and so anymore you have started salt, and then your pipes are full of solid sold and this is a big pain to sort out one time the plants have to shut down for 8 months on and another time. but most of the sold thank leaked and the ground got contaminated so the entire tower had to be taken down. the pond eventually closed and solar was of the company behind. it ceased to operate. they were really, you know, they were really rock'n'roll. busy and silicon valley type of guy, so they were okay, we're going to revolutionize the world and we need to build lots of these towers and they were, you know, move past and break things. and, and turns out for csp that wasn't the, the right approach, right? because they need to figure stuff out, do operations, and maintain and spend the night spending that it, it takes some time. kristen doings generates small amounts of electricity again, but a ton is the image of csp, particularly in the us, which hasn't built another big plant since other mega projects like the idea to

build big plants and the so how about the power of europe also fell flat today and all of the world's plants taking together have a generating capacity of 7 gigawatts, for comparison, the $1700.00 gigabytes of photovoltaics solar panels out there. so sees p is never made it big, and it's seen it's fast share of setbacks. but that's one reason why we shouldn't give up on the ideas. and that's the same reason why china has been building many of these in the past. yes. because that's one thing that fordable takes come to think about federal tax. it really does not generate that night. but it's concentrated solar can new of plants don't just heat up multiple sold to you straight away. they also have big tanks to store it once it's hot. it only caused by one degree celsius per day in that and can be used to run the turbine at the lights up points like after the sun has gone down. cool. and lots of people are using lots of electricity all at once. it's important to have these clean sources of energy. we can dispatch around the clock as we pluck more renewables into

upgrades, because they only work when the sun shines with the wind blows. having this flexible supply might also justify paying a little more for the future of csp, move to the different nice rates side, and used to be a power technology like wind, mtv. and now it's really very much a storage technology. is it ralph? cause other ways to store electricity like lithium ion battery is that now often get billed right next to solar farms. but they have typically used to shift up to 4 hours worth of energy. you can build big a batteries to cover the night for example, but that will be very expensive. since what the salt is quite cheap, it's more economical to use this for longer periods. it's also possible to use electricity from sol dependents to heat up the molten salts, but that's less efficient than directly using csp to capture the sun seats. at least the sizes with lots of sunshine. c, c has been in the doldrums, are vastly say use because we lost the dice on energy about the realities for the provision of knots on the special energy with deserts. there's nothing that's the

street. this is craig, what's the ceo of fast company that's working on new designs to fix the problems? concentrated solar power. i'm headed in the past. we've out now system, you know, we have solid family noise, harps, sunny places you end up needing to the fossil fuels that are not time energy. they already built a small demonstration plant and eastern australia to prove that technology works. the next step is to build a bigger ones with 8 hours of storage. this report by the us national renewable energy and the board tree. so if that's the manual, it was compiled after the failure of crescent units and analyzes all the problems. it's and other sees the plants and counted and that's, that's really great. cool because, you know, it's, you kind of learn from the mistakes of the past, and there's not really a feature that the technology. as you can see, they build several small talis, instead of one big one. they say this makes it easier to build and to vary the size of plants without having to come up with custom designs each time, which saves money. also it's liquid sodium,

so metal and not molten salts that's circulating through the system. if this becomes solid in case of a shut down, it's easier to melt again, then salts the boss than not the only ones that took an interest in the csp reports that become the, the chinese use bi engineer. come book like that, a bite of what has now changed everything for csp at the moment is that the china is, you know, getting into a big china is re discovering, concentrated solar power around 30 plants and development label than anywhere else . that's because every renewable talked with one people with capacity now must include 10 percent of storage. and the government issued this notice saying it will support the large scale and industrialized development of solar thermal power. the idea is simple. during the day you use solar p, v to produce cheap electricity and concentrate that sold out. so he talked to

storage things. then at nights when the solar panels lie idle, you use the stored heat to run you a turbine. so what does this mean for concentrated solar kinds of technology? really state to come back? well, a lot depends on whether china solo tile us become a success and, and the sort of a tower been have a real possibility of developing economies of scale to, to really figure out how everything works. and then we'll hopefully see the same thing that we saw with p b or with wind, that the supply chain gains from china really enables or a cheaper or better at products that will be available, but also in other countries. and in africa potentially in europe, potentially in the us. but this would also mean those other countries have to see the potential and put policies in place to support the technology without support and will be hard for csp to get off the ground again. either way,

it will likely never get as big as people ones thought it was sold at. sales have won the technology rates and catch at the mass market. but speed might've fountain unique and it will be exciting to see whether it can phillips as you ever heard about this crazy looking solar technology. and what do you think about it? let us know and the comments and don't forget to hit subscribe because we have more videos like this for you. every friday. we the magical beauty, dark melancholy, the paintings of customer, and to be treated like an artist whose works continued to influence the world even today. but why exactly?

finally, for the 250 of the anniversary of his birth taskbar david fleet, at least explained both unveiled next on d. w. sound side was a major vision to getting more women on stage. life never played an instrument before. not a problem. ruth miller sounded the glamorous music collective with a single goal to have time she was the pump mom in 60 minutes on d. w. on the long voyage through the ocean, another humpback well with the comp for a long time, they had to be humans on the journey. now the trenches have become very protective

of whales until the results of the ocean conservation start september full. i'm dw the most if you have to imagine that it really hits like a bomb. i just don't have anything upon the paintings, like a bon. we're talking about cost, but obviously donation a painter who still has an influence on the visual aesthetics of today. we'll examine his paintings of magical beauty and dark melancholy. the painter of the sky, the sea solitude, silence, and we'll also meet people in whom his paintings live on. and we'll find out why he depicted everyone from behind cost but dotted sweet nation revealed.