This guy's a real trooper and has been putting out videos throughout the Russian invasion. And his city in Ukraine is maybe 150 kilometers from Kharkiv. Very impressive dedication in the face of potentially serious danger,
I recently found a paper on hydroforming of stainless steel sheets to construct lightweight telescope mirrors (no toolmarks!). Ideally, you would want the steel sheets to stay in the curved shape by themselves, which can be achieved by hydroforming or stretch forming. I suspect the screw mounting positions are more detrimental than they look, creating lager "blind" areas when the collector is narrow.
@@fleaniswerkhardt4647 UA-cam totally deleted my earlier reply, as was to be expected. They really hate citations. Search for "Design and development of a freeform active mirror for an astronomy application" by Zalpha Challita et al. (2014). It should be the first arXiv link.
i read paper but its too advanced for me i think, let me tell you something if you put secondary reflector at 90 degree perpendicular to the first then you can achieve a point focus not many knew about this method, you dont need exact or pristine parabolic curve only 2 bended sheet opposite to each other
- ?? edge clamping in to the formers - with adhesive for permanent fixing.. The flexible sheet should naturally conform to the curve with little distortion.
I am looking for a good reflector for my projects. Concentrating reflectors must be "specular" (You have to be able to see your reflection in them) So white paint won't work, it is reflective but not specular. ). The issue with stainless steel is that it absorbs infrared so it doesn't reflect as much energy as aluminum. Most aluminum sheet is highly reflective but it isn't specular, it has "differential reflection" so it reflects differently depending on the direction light comes from and this is no good if you are doing parabolics. (Aluminum sheet has microscopic corrugations on it, like on a metal roof, and this is what causes the differential reflection. You can test this by shining a laser pointer on a glass mirror, the reflection of the point is a dot, on a aluminum sheet the reflection is a straight line in one direction and a semicircle at 90 degrees to that direction! Also, aluminum has a thin aluminum oxide layer (That's the same stuff that's in sandpaper) on it so it is really hard to polish it, so, you have to buy sheets of aluminum specially made to be specular (mirror like finish) and also aluminum is both acidic and basic so a lot of materials react with it. I believe you need an extra plastic or varnish layer on the sunny side to prevent corrosion. I have also tested mylar with a laser pointer (some light goes through it) plus when I used it, (years ago) you could scratch the metal coating off so it didn't last very long, and metalized plastic, which is usually a very thin layer of aluminum sandwiched between 2 layers of plastic (the silvery plastic from crisp or chip bags and plastic chocolate bar wraps) and some let lots of light through to the other side and some very little. BUT they are specular! The best (non glass mirror) reflector I found so far was a silvery coloured plastic plate from a dollar store. It looks as if it is nearly as good to reflect light as a glass mirror. So, its cheap (dollar store) and it could be manufactured as "petals" for parabolic dishes or perhaps any other shape. I don't know how the metal colour is deposited on it. And I don't know if it could be made to come on a roll like mylar, and I don't know how long it will last in the sun, but it is the best reflective material I have found so far! I hope this helps.
For the folks concerned about dust, scratches etc. you may want to search youtube for Tamera Fix Focus mirror. They have done some good research and they are using a material called ETFE to protect the reflective film
This is a complete guess, but im thinking that the possible useful lifespan of the stainless sheets would be longer in other ways too. Glass over time will scratch just due to dust, wind, rain ect. Once glass is scratched it needs replaced, whereas maybe yhe stainless could be refurbished using a buffer and some cutting compound. I could absolutely be wrong, but just something that i was thinking of. Great video as always my friend! Your videos always get me thinking about new solutions 👍👍
If the goal is to heat water to below boiling(say for house heating or bathing) it can be more energy efficient to make something like a car radiator, facing towards the sun, coated in something very black, and enclosed in double paned glass. to porevent the cold outside air from taking away the heat. You shouldnt be able to get boiling water from this(it is possible if there is no airflow) but you should in theory have better energy collection efficiency, heating a higher volume of water, faster than a solar concentrator, when you take the area of the entire structure into account. You can also make solar concentrators more effocient by doing much the same as described above, as the point of the radiator is not just to give more surface area, but to reduce the ammount of light that bounces away, making each beam of light bounce more and more inside of the radiator, instead of just once.
The outperformance of the concentrator will be most noticeable in cold weather such as below freezing (assuming you use an antifreeze additive or a non-freezing heat transfer fluid)
@@chavocanuck As long as you have decent thermal isolation, you can get better efficiency from the above scenario, The equivelant of a double dewar preventing the wind from blowing away that heat
Try to make a water lens. This could be a cheap replacement for the Fresnel lens. The plastic film is stretched on a round frame and watered from above.
this is good for emergency purposes but wider are need wider plastc and they will brust apart by weight just like telescope mirror that's why they didnt cast a huge metre of glass
You might try coding some sort of parabola with the super white paint as described by tech ingredients and nighthawkinlight. It has a reflectance of greater than 99% utilizing the same principles as snow scattering. Through this property it is able to achieve a material service temperature lower than ambient temperature.
stainles mirror wil get dirty and oxidise with time ...if you install out of reach of hand no good cant clean...also maybe need enclosure an glass to sawed heat and stop mirror from getting dirty
I'm sure there is a solution, like a heat resistant lotus effect finish or something. But... does it really matter? It should be easy to keep the mirrors clean and polished regularly using common methods. Finally, Sergiy states that his mirrors are still working well after seven years. Greetings from Germany, I wish I could sponsor all of Sergiy's efforts because this is the future.
I think there are much beter reflective materials like Mylar and white titanium paint who are cheaper than stainless steal they use this for light reflectors also polished aluminium is more reflective than steal
hi. it seems that new pervoskite panels from oxford pv... they have starting mass producing them now. With these initial versions at 30% effeciency. It seems they will be the game changer for electrical solar. Because the effeciency may be increased even further, the theoretical maximum for this technology is high (like maybe 70% as the physics upper limit). More modest expectations is still like... 40%+ Cost wise remains a bit unclear to me. But if the motivation to save the earth exists, then those in responsible positions should not be too greedy. In various ways to ensure a good widespread adoption The reason I bring this up is clearly because: electrical PV solar is easier to install, easier to manage and upgrade or connect to grid. With smaller deployments. There is no minimum size to worry for being worth adopting etc. So it should remain as a preferred option over these other variety of alternative schemes. Being direct conversion to electric. It removes a lot of different headaches. So many.
@@viyusavery248 if you just put into google these 3 keywords: pervoskovite oxford pv then you will find articles and more infos about these ones. There is also a good video by a solar enthusiast who explains well, here on youtube which is nice summary overview... which is channel "Just have a think" the video titled "Perovskite solar cells. Major new breakthrough!" ... here is link for that one. perhaps youtube comment will allow it ua-cam.com/video/oW1pfxDSPTE/v-deo.html&pp=ygUJb3hmb3JkIHB2
i think Mr Yurko Is on the right track here. Wherever possible direct use of direct heat from the sun should be used as it is way more efficient than sun->pv-electric->heat usage. It is cheaper, has less environmental impact and can be made "locally". I'm not saying no to pv. I'm saying we should harvest and use the energy as efficient and eco friendly as we possibly can. Hot water and house heating can easily come from the sun as Mr Yurko's work has proven. Even at my latitude 59° north. I already use pv panels for my electrical consumption with the exception of hot water and house heating.
@@alexandrevaliquette3883 How to contact him, is there any email? Perhaps as his followers, we may collectively arrange a safer place for him for the time being.
В вас криво фокусує через не ідеальну раму. Я пропоную пропустити профільну трубу 20 Х 20 через роликовий трубогин і зварити з цих дуг основу. Мені здається що в такому випадку фокусування значно покращиться. Кріпити лист до такої рами слід болтами і гайками через наскрізні отвори в рамі. Тут також сталева рама матиме переваги, оскільки закручуючи шуруп в дерево при затяжці під шурупом дерево проминається і утворюється яма. В випадку сталевої рами такого не буде.
Hi, i have the feeling you are repeating yourself over and over. Your "discoveryes" take no longer than 20seconds....rest like i said you are repeating yourself, question here is Why?
I think there are much beter reflective materials like Mylar and white titanium paint who are cheaper than stainless steal they use this for light reflectors also polished aluminium is more reflective than steal there are foils of polished aluminium with protective foil so they cant oxidize they use this for lights and construction busines also much cheaper than steal they call it mylar and many other names
Solar in a war-zone, that's pretty-good of you.
This guy's a real trooper and has been putting out videos throughout the Russian invasion. And his city in Ukraine is maybe 150 kilometers from Kharkiv. Very impressive dedication in the face of potentially serious danger,
Not to mention that it is reflective solar, instead of photovoltaic solar. Reflective solar could make it easier for the invaders to locate him.
@@justinweatherford8129 No doubt. And they'd destroy anything that looks new and shiny out of sheer spite and bloody-mindedness.
@@fleaniswerkhardt4647 like destroying Gonzalo Lira?
Great to see these videos come out. Will be making my own this summer, all going to plan!
Sergiy Yurko you're my hero!
Me too!
I recently found a paper on hydroforming of stainless steel sheets to construct lightweight telescope mirrors (no toolmarks!). Ideally, you would want the steel sheets to stay in the curved shape by themselves, which can be achieved by hydroforming or stretch forming.
I suspect the screw mounting positions are more detrimental than they look, creating lager "blind" areas when the collector is narrow.
is the paper available publicly?
@@fleaniswerkhardt4647 UA-cam totally deleted my earlier reply, as was to be expected. They really hate citations.
Search for "Design and development of a freeform active mirror
for an astronomy application" by Zalpha Challita et al. (2014). It should be the first arXiv link.
i read paper but its too advanced for me i think,
let me tell you something if you put secondary reflector at 90 degree perpendicular to the first then you can achieve a point focus not many knew about this method, you dont need exact or pristine parabolic curve only 2 bended sheet opposite to each other
@@dogodogo5891 tell me more, please.
- ?? edge clamping in to the formers - with adhesive for permanent fixing..
The flexible sheet should naturally conform to the curve with little distortion.
I am looking for a good reflector for my projects. Concentrating reflectors must be "specular" (You have to be able to see your reflection in them) So white paint won't work, it is reflective but not specular. ). The issue with stainless steel is that it absorbs infrared so it doesn't reflect as much energy as aluminum. Most aluminum sheet is highly reflective but it isn't specular, it has "differential reflection" so it reflects differently depending on the direction light comes from and this is no good if you are doing parabolics. (Aluminum sheet has microscopic corrugations on it, like on a metal roof, and this is what causes the differential reflection. You can test this by shining a laser pointer on a glass mirror, the reflection of the point is a dot, on a aluminum sheet the reflection is a straight line in one direction and a semicircle at 90 degrees to that direction! Also, aluminum has a thin aluminum oxide layer (That's the same stuff that's in sandpaper) on it so it is really hard to polish it, so, you have to buy sheets of aluminum specially made to be specular (mirror like finish) and also aluminum is both acidic and basic so a lot of materials react with it. I believe you need an extra plastic or varnish layer on the sunny side to prevent corrosion. I have also tested mylar with a laser pointer (some light goes through it) plus when I used it, (years ago) you could scratch the metal coating off so it didn't last very long, and metalized plastic, which is usually a very thin layer of aluminum sandwiched between 2 layers of plastic (the silvery plastic from crisp or chip bags and plastic chocolate bar wraps) and some let lots of light through to the other side and some very little. BUT they are specular! The best (non glass mirror) reflector I found so far was a silvery coloured plastic plate from a dollar store. It looks as if it is nearly as good to reflect light as a glass mirror. So, its cheap (dollar store) and it could be manufactured as "petals" for parabolic dishes or perhaps any other shape. I don't know how the metal colour is deposited on it. And I don't know if it could be made to come on a roll like mylar, and I don't know how long it will last in the sun, but it is the best reflective material I have found so far! I hope this helps.
For the folks concerned about dust, scratches etc. you may want to search youtube for Tamera Fix Focus mirror. They have done some good research and they are using a material called ETFE to protect the reflective film
This is a complete guess, but im thinking that the possible useful lifespan of the stainless sheets would be longer in other ways too. Glass over time will scratch just due to dust, wind, rain ect. Once glass is scratched it needs replaced, whereas maybe yhe stainless could be refurbished using a buffer and some cutting compound. I could absolutely be wrong, but just something that i was thinking of. Great video as always my friend! Your videos always get me thinking about new solutions 👍👍
The brightest reflective metal is aluminum.
@@Jkirk3279 but not for very long
Слава Богу ви живі! На основному каналі вже більше року відео нема - я вже переживав що ви стали жертвою військових дій.
If the goal is to heat water to below boiling(say for house heating or bathing) it can be more energy efficient to make something like a car radiator, facing towards the sun, coated in something very black, and enclosed in double paned glass. to porevent the cold outside air from taking away the heat.
You shouldnt be able to get boiling water from this(it is possible if there is no airflow) but you should in theory have better energy collection efficiency, heating a higher volume of water, faster than a solar concentrator, when you take the area of the entire structure into account.
You can also make solar concentrators more effocient by doing much the same as described above, as the point of the radiator is not just to give more surface area, but to reduce the ammount of light that bounces away, making each beam of light bounce more and more inside of the radiator, instead of just once.
The outperformance of the concentrator will be most noticeable in cold weather such as below freezing (assuming you use an antifreeze additive or a non-freezing heat transfer fluid)
@@chavocanuck As long as you have decent thermal isolation, you can get better efficiency from the above scenario, The equivelant of a double dewar preventing the wind from blowing away that heat
Привет ну ты уникальный мужик лайк за видео
Did you have to polish the steel sheets yourself, or do they come this clean from the manufacturer?
I also bought some of that sheet material, it's sold with a mirror finish and peelable protective foil, but may also come coiled and without the foil.
Try to make a water lens. This could be a cheap replacement for the Fresnel lens. The plastic film is stretched on a round frame and watered from above.
this is good for emergency purposes but wider are need wider plastc and they will brust apart by weight just like telescope mirror that's why they didnt cast a huge metre of glass
use thin BENDY shiny steel which be custom curved with a single screw at the back to the required focus.
You might try coding some sort of parabola with the super white paint as described by tech ingredients and nighthawkinlight.
It has a reflectance of greater than 99% utilizing the same principles as snow scattering. Through this property it is able to achieve a material service temperature lower than ambient temperature.
I want to see the steam generator used for electricity production
Water lense? Water tube? To concentrate the sun energy?
would bying used satelite dish be an option?
Still watching this video... thinking to make water heater fo some kind biogas reactor
or for modification for climate environment
stainles mirror wil get dirty and oxidise with time ...if you install out of reach of hand no good cant clean...also maybe need enclosure an glass to sawed heat and stop mirror from getting dirty
Is there any coating from 3M or similar that can reduce the problem?
I'm sure there is a solution, like a heat resistant lotus effect finish or something. But... does it really matter? It should be easy to keep the mirrors clean and polished regularly using common methods. Finally, Sergiy states that his mirrors are still working well after seven years.
Greetings from Germany, I wish I could sponsor all of Sergiy's efforts because this is the future.
The surface of Mars is covered with fine iron dust. Mirrors could be made from this dust. And in this way to produce energy.
I think there are much beter reflective materials like Mylar and white titanium paint who are cheaper than stainless steal they use this for light reflectors also polished aluminium is more reflective than steal
@@doctorinvizible2077 please share. Thanks.
what is the war situation there brother , are you guys ok saw one of the videos a while back where bombing was taking place in your neighborhood.
1m lens can boil water, boiling wates is 1000w
hi. it seems that new pervoskite panels from oxford pv... they have starting mass producing them now. With these initial versions at 30% effeciency. It seems they will be the game changer for electrical solar. Because the effeciency may be increased even further, the theoretical maximum for this technology is high (like maybe 70% as the physics upper limit). More modest expectations is still like... 40%+
Cost wise remains a bit unclear to me. But if the motivation to save the earth exists, then those in responsible positions should not be too greedy. In various ways to ensure a good widespread adoption
The reason I bring this up is clearly because: electrical PV solar is easier to install, easier to manage and upgrade or connect to grid. With smaller deployments. There is no minimum size to worry for being worth adopting etc. So it should remain as a preferred option over these other variety of alternative schemes. Being direct conversion to electric. It removes a lot of different headaches. So many.
Can you provide sources/UA-cam videos so I can keep up to date on this progress?
@@viyusavery248 if you just put into google these 3 keywords: pervoskovite oxford pv
then you will find articles and more infos about these ones. There is also a good video by a solar enthusiast who explains well, here on youtube which is nice summary overview... which is channel "Just have a think" the video titled "Perovskite solar cells. Major new breakthrough!" ... here is link for that one. perhaps youtube comment will allow it ua-cam.com/video/oW1pfxDSPTE/v-deo.html&pp=ygUJb3hmb3JkIHB2
i think Mr Yurko Is on the right track here. Wherever possible direct use of direct heat from the sun should be used as it is way more efficient than sun->pv-electric->heat usage. It is cheaper, has less environmental impact and can be made "locally".
I'm not saying no to pv. I'm saying we should harvest and use the energy as efficient and eco friendly as we possibly can. Hot water and house heating can easily come from the sun as Mr Yurko's work has proven. Even at my latitude 59° north. I already use pv panels for my electrical consumption with the exception of hot water and house heating.
do you use model turbines to generate or if not, where do you buy them?
I neeed this
How can I
Sergiy, you are located in Ukraine? Can you please discuss anything about the conflict with Russia?
Would you be interested in designing a project to be deployed in rural India? If yes, how to contact you to discuss your fees?
Your call is important for us, but Sergiy is currently under heavy bombing from Russia. Maybe wait few months.
@@alexandrevaliquette3883 How to contact him, is there any email? Perhaps as his followers, we may collectively arrange a safer place for him for the time being.
Why use computer voice?
Чи буде це відео в українській або російській озвучці.дякую
Slava!
В вас криво фокусує через не ідеальну раму. Я пропоную пропустити профільну трубу 20 Х 20 через роликовий трубогин і зварити з цих дуг основу. Мені здається що в такому випадку фокусування значно покращиться. Кріпити лист до такої рами слід болтами і гайками через наскрізні отвори в рамі. Тут також сталева рама матиме переваги, оскільки закручуючи шуруп в дерево при затяжці під шурупом дерево проминається і утворюється яма. В випадку сталевої рами такого не буде.
Hi, i have the feeling you are repeating yourself over and over. Your "discoveryes" take no longer than 20seconds....rest like i said you are repeating yourself, question here is Why?
I think there are much beter reflective materials like Mylar and white titanium paint who are cheaper than stainless steal they use this for light reflectors also polished aluminium is more reflective than steal there are foils of polished aluminium with protective foil so they cant oxidize they use this for lights and construction busines also much cheaper than steal they call it mylar and many other names