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Saving the World with Space Solar Power

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it people in the eye and if the the the next talks actually 2 talks will be about them somehow about saving the world and sending the environmental and we would have 2 different ways of saving them and the 1st talk saving the world was space solar power is said by Stephane and and yeah and they work as space engineers and they at the Technical University that talk will be followed by another approach which is introduce to you but I could stop he has a PhD in theoretical physics and his former work was there he was ready with value perturbation theory in supersymmetric Yang-Mills theories and now he is doing can gamble on wind energy and it will be his talk about so please give the 3 of them a warm applause few her her her the yeah hello as of today we're trying to save the world with introducing you to 2 very different approaches offer sustainable energy generation and we're sweep the 3 of us and we start with a stiff different yet another 1 thinks firing us here and and the without them and talk
about space solar power are of course
we have an all time and I will stop introduction showing you this is a very
nice picture here you see the Earth at nite also known as the model it's and a very interesting picture because um it's it's uh illuminates your it shows you where people live or at least where people have electric energy but there's more information in this picture when you start comparing these these pictures from different years he also can see how a certain and uh in regions are developing and you also see where suddenly get start where there's been a catastrophe or more war or them something like that so
and the availability of electricity is an indicator for human development we still have an increasing amount of power this is also something we can see what that picture bats and unfortunately the currently this power demand is um largely covered by 4 of the resources so it yes we definitely renewable sustainable energy such as solar power wind parks what plants or even other solutions this thing with
um terrestrial bounds and so am energy plants is that there are bound to a certain location on earth normally so you I don't need to decentralize them having a lot everywhere or energy needs a lot of the transfer infrastructure the other thing is that some especially when thinking about wind or solar power and that the availability is very varying and sponsor certain time conditions so you need to start the energy 1 coming in talking about solar energy of cost me when the day nite cycle we have the atmosphere so when whether interference as so why not go into space there's some selling arguments of some
reasoning arguments about space solar power as I already said it's a sustainable concepts of fun Porat and space generally very very large so that means that this we can we can it quite big structures without covering any at any space and the area under the and we were it is possible to have some some some lights on our satellites up there all around the clock and we don't have an atmosphere say you there's no weather so space solar power promise to have an unlimited constant and predictable energy source the that's cool good In addition we don't need that much infrastructure and to distribute a the and the power on off for example if you compare that to a to a huge uh all of the age of for example Mizuhara you would need a lot of k this in order to to get the poor for example to Europe this comes with some problems and but also if solving the problem of um of power transmission you can you can get energy to very very remote locations on and you also can get the energy that quite quickly and then of course the intervention the landscape is they let's call it minimized to a certain way the this concept of space solar power 1 actually isn't that young it's and then there's a patent from P to glacial from the seventies who already proposed um method and the practice for converting solar radiation to electrical power and in you guess the best small red spot and actually you can see that but you already see that he and introduces all components that are in need of course with the Earth we need some large area for solar some collection and we need some ground some antenna in order to transmit this power since the seventies the basic concepts where actually discussed all along since since then they where the cost and the state of the art um approach in and for that is called st as alpha which stands for a solar power satellites the mean of a aleatory last piece rate but and it's the best documented approach in that area which comes with the phase 1 study financed by NASA in 11 feet and 2011 and to um 12 and they suggest um as satellite structure based in the geostationary orbit which is non moving growing gravity gradient sterilized at collecting this turn them with a very very large and we're all and the rank and it has the form with the microwave you it looks like that for
example or it could look like that it's like a like wine glasses could look like a
panel M. but there's 3 main components here so we have
the um the sun reflector morose this is this very very large state these there's some reflecting their roles are made of um actually um so let's say material materials so extremely light weight although there's a big the copies of this
and of this installation of the so context models to to see here and they host both the and the the soul of the the solar panels and and the you were wireless power um transmission modules we come to that later and then of course you also need the structure which hold everything together the In addition to that you need some some some support structures like the robots and combining fixing that exchanging models and so on but they are not further discussed yet
but the other approaches and the only 1 there's also an approach from from Jack services the the and Japanese space agencies the they call their approach tell that SPS it's also a low gravity gradient lies approach which you can see here and the use basically the same but they don't have the merits they're selling argument as um yeah you know our our system is so simple we're sure it will works out but they also say that it's not as the as efficient as as the other approaches In addition there are a Japanese scientists involved in the and mask is often studied that's what I think is most interesting and there are also some a lot of japanese approaches and driving for what the a wireless power transmission then there's a new a quite new approach
uses from the Chinese space agency of cost and they suggest a more to rotary joint as ast which can see here so um here in this this yields but all over here also is the transmit transmission antenna but they have their solar arrays um um bound in this structure which is approximately 10 kilometers white and then they just the position of the solar panels and according to the sun position so this is how they try to overcome increase the um the efficiency there's also a paper from uh from from Europe which is quite old and not aware of them off of a current work on on European round here
if we is summarized some of the core parameters of these the 1st 3 and documented or still discussed approaches we come to this some nice table so we're talking about them a power transmission between 1 and 2 what's this entire structures have the mass of them about 10 thousand tons metric tons or even an even more of this japanese approach the as are quite bit we come to that later on this comes over certain dead energy density but sperm the total efficiency of this at some of these approaches are calculated and their source will the like a small wish list included and this service at 11 she is in the range of more or less at 20 per cent I I put a question mark and behind us 25 % of the jocks approach because they even said that they won't be as efficient at the others as the others are so they don't take this number too serious maybe maybe we must calculate that's some down with that with those 3 approaches I don't say the problem solved does not the so it so concepts but there are some major challenges we want to point out here and at 1st and this is the attitude and orbit control so this station is in the geostationary orbit on there are several that do you satellites in doing the same it is working quite well but this and to be alight or about 1 . 8 2 0 metric tons and this station we're talking about is about 10 thousand tons on 9 to 25 thousand thousand tons and so this is a huge difference and In the deals they show it is not a big deal to rotate it's very slow so the and we just the 2 point 2 what's curious to ah hit the did it point on everyone a transferred energy to and then we are have a phased array antennas at this little are modules you saw before to form the beam which points exactly to the receiving point at you have for the energy the 1 other point is the key orbit control this means to you on distance from Earth Interspeech to stations struggling with and this is another point is this already for TV satellites difficult to uh to do on the now we have as I said these 1 thousand metric tons station to to lift up to you uh right distance or to accelerate on there are several other forces trying to pushes out of the exact orbit and we would use export we 1 appointed the rest of you no gravity the sun gravity for solar gravity and the flexible to Earth you know the Earth is not a perfect sphere is more imperfect is more like a doughnut you have flattened points at the and bolts which I'm can strip due to gravity field that there's solar winds and the radiation pressure uh so comes from Saunders's diesel particles hitting the station and putting it out of your original so there's radiation pressure at the same the comes from deep space on this station this hugely of a huge so phrases so different from the most to be satellites thrift overcome this I look at you with nearly unlimited energy was a station and we can use electrical fossil so we don't need any fuel or propellant made of the propellant chewing up to the station and another point is you power transmission I think this the most critical point and as I said that's in the geostationary orbit and I have example here that shows the peers because the numbers are so wrong but and most of the concepts are assuming this you saw before so I think of order 1 gigawatt output station and indeed the picture on the right and top to conceal valuable point here and sending antenna this would be about 1 thousand meters in diameter so this this is about 1 attend soccer fields uh place in space and this antennas sending 0 microwave being armed with 2 . 4 5 the or a 5 for that it's too so frequencies chosen because of the low attenuation or damping in the atmosphere 1 and transfer the most of the energy and this being the hits at the receiving antenna where in the 2 circles the rectenna and under strict turned on and it's going to be about 5 thousand meters in diameter this the 2007 on 50 soccer fields or abolished trench times the mass about such area so you can imagine this is so this is a big deal if you think about wind power so ugly than a maybe a thing this area we OK so you can read more about the like in the references we have nothing to lose are now you and I guess you wonder about the efficiency of this and you talked about already all of it and I have the subsystems here including and I think the most important by this migration being used to search position and this is actually not tested so this is just a couple at a number on this 85 % or 90 95 % is just from the studies we and currents that some tests are more in the area of 1 % or a few % and and most studies are not really certain of all at the total efficiency so we have from 18 to 24 % of these numbers and from other studies you have 30 % to 25 % this is most calculated the so now would wondering if now when laser work for this sort of migratory this sounds nice and of this nice and receiving antenna but is it would be much smaller gas solid gas basically you could use laser for this I'm and would have a much higher energy and energy density so you know I could hear those really smaller spot on is to receive the energy you don't have to use 5 kilometres and receiving antenna but most of the research institutes don't wanna talk about lasers and I think it's just want to obviously you have some
yeah OK so OK so this is
the most technical things either I think the we for that and I'm efficient about this extremely large structures and they have to be built and and since there also are meant to be in the geostationary orbit where we have a certain radiation and us and um the we want these components to operate for quite a long time and they are usually quite expensive and get all the saddle and the the certification for sending them up there is also very extensive somehow this as other approaches thought about that and they are aiming at although the numbers of very very much and I am at the material cost of um health and 250 kg at 250 dollars per kilogram which still is there are some some billion dollars and it is also wish list so and they they are aiming for this number in there so that approach where they think that they already have the mass production and have the certification and the the engineering development cost all covered up already the there's another thing and this is the golf course so we're talking about a structure which is maybe 10 and 10 thousand tons large or the heavy and again the SPS of a guys they hope that they could logically for 600 dollars into the let below us all that and continue from the low of of it into the geostationary orbit with electric attract trustor's K and maybe if the VFR rockets 0 will be available for the price of a affect mind maybe and but this also with would take some time just a real reality check right now them for the prices the space X did that and provides on their side of the Falcon Heavy which as which was erected today I don't know whether you have that so also them fuckin having hasn't flown yet but and space X hopes that they could sell the the fuckin heavy fora and 19 million dollars in order to live 26 tons into geostationary orbit but that would be approximately 400 launches for such a structure SES disulfide and also would cost them some that tens of billion dollars in in addition to that there are some other costs like at the initial orbit installation costs which comes with 11 billion dollars and an operation of 100 million a year or so it's quite expensive and and probably this is also 1 of the reasons why we don't have space solar power um yet but still I mean we have technical problems this is just money maybe it's also solvable MIT the yeah so you know the concept you know about the new challenges and let's assume we can overcome these challenges and of someone is funding this the station but I I think there's some considerations of all the free we wanna do this and at 1st on so this being the this on and you need a precision of about 1 10 thousands of a degree plus minus to hit 3 to spotted years so this is like and you wanted a a lot of 100 meters of from a station flying with 3 kilometers per 2nd on if there's something goes wrong and to being the 1st hitting the wrong spot is maybe I'll you know so that idea and they always some of the antennas are not really working well the beams of forming right and it's string somewhere so this is 1 . it let's assume everything works well
and and the beam is still going through space and it's going to have to and there are some other satellites going maybe is for an excellent they go through the being what happens down or if on if you can't order by accident in the airplane goes through the beam so it's not even allowed to turn on your phone on the on the airplane on you can imagine what happens if this being with 50 watts per square meter and hits the upper another once it in this so and now you can't avoid uh their animals birds insect whatever go out through the beam the and there may be you have same imagination and I have what we have and so it looks like this may be due to this sounds pretty scary I think on
doesn't through deliberate sound like an energy weapon hours so we thought about OK for 50 watts discriminative smarts like a nuclear weapon but it still it could harm a lot on this a high energy density and you can reuse fast readjust this being so you can pointed in 1 2nd to the receiving antenna and the next 2nd you can just pointed to some city and a 2nd later you pointed back is really fast to change on it's not really definable I mean are you consider longer and tried to to hide the and maybe put your aluminum metal on 1 after all it's useful in the but still this thing of 24 7 1 so it could it you're a bunker all the time on and at last year's and there's a lot of interest from military our institutions so this is I think is a scary OK on and then you would ask but is legal to install this kind of some application so basically we you see on there already in the United Nations alters Space Treaty was 1st signed from the Russian Federation and the United Kingdom and the United States and now it's in the United Nations treaties and is most of the other countries signed a 2 it's about all activities of states in the space I see what does it say about this case here and assess their normal nuclear weapons or other weapons of mass destruction allowed in outer space as always is a back door if this if you install a military object in order space with the scientific reason then it's a lot again so another point is an industry do you must not influenced the Earth's environment at all there are no real studies about this that I have a feeling it's gone influence on how the environment but on much about the sum of
FIL finally on this all this funding and this technology and the knowledge is necessary so it's only possible by sums so some few states to build this and how you prevent that certain leaders of states or whoever's 1 of built this is misuse this technology and so on I can give you an answer on that but I think there are some who shouldn't have to see the there once and you may be you can have it and think about this after the talk and you know we have some take home words for you for money the so I yes the concepts are existing and we don't say that they are and that they should not be discussed and that they are entirely evil B and it's technologically feasible and he's um that's that's propose some studies bad I mean it's it's challenging and the technology is not there yet but the moral questions are still open so yes it's still pretty science fiction and as I said we don't say it so and we should not do that at all that these we should think about it and be um be critical with these kind are also with other and new technologies so but right now maybe we should think about is there is another solution through to this energy problems may be more realistic may be less problematic metric 1 I mean so much to do with
the the the the th th St what just the fact that people talk
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Titel Saving the World with Space Solar Power
Untertitel or is it just PEWPEW?!
Serientitel 34th Chaos Communication Congress
Autor anja
sjunk
Lizenz CC-Namensnennung 4.0 International:
Sie dürfen das Werk bzw. den Inhalt zu jedem legalen Zweck nutzen, verändern und in unveränderter oder veränderter Form vervielfältigen, verbreiten und öffentlich zugänglich machen, sofern Sie den Namen des Autors/Rechteinhabers in der von ihm festgelegten Weise nennen.
DOI 10.5446/34796
Herausgeber Chaos Computer Club e.V.
Erscheinungsjahr 2017
Sprache Englisch

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Fachgebiet Informatik
Abstract Space Solar Power station, such as SPS Alpha, could overcome some issues that renewable energy plants on Earth suffer of structural basis when challenges such as energy transfer from orbit to Earth are solved. But will this solve the Earth's problems in a peaceful way?
Schlagwörter Science

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