Author Topic: Energetika juče, danas, sutra  (Read 17083 times)

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Mica Milovanovic

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Re: Energetika juče, danas, sutra
« Reply #100 on: 18-01-2018, 12:49:27 »
Mada ima i nekih renewables koji su i dalje skupi, a forsiraju se...
Mica

scallop

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Re: Energetika juče, danas, sutra
« Reply #101 on: 18-01-2018, 12:50:46 »
Mada ima i nekih renewables koji su i dalje skupi, a forsiraju se...


Fitnes, na primer?
Never argue with stupid people, they will drag you down to their level and then beat you with experience. - Mark Twain.











mac

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Re: Energetika juče, danas, sutra
« Reply #112 on: 06-06-2018, 10:45:03 »
Rusi udaraju na nuklearno, MIT na solarno:
Solar Cell Breakthrough Could Make Panels Far More Efficient.

scallop

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Re: Energetika juče, danas, sutra
« Reply #113 on: 06-06-2018, 11:47:39 »
Mi sa pejsmejkerima i oni sa brojnim satelitima prvi link čitaju ozbiljno. Znamo i zašto. Plus, Rusi dijamantskog praha imaju i za bacanje. Zamislite satelite bez velike površine solarnih ploča koje se lako oštete i posle padaju na glave. Kao kolibri i albatros.
Never argue with stupid people, they will drag you down to their level and then beat you with experience. - Mark Twain.





scallop

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Re: Energetika juče, danas, sutra
« Reply #118 on: 31-07-2018, 17:40:00 »
Imao sam kućnu raspravu o raspoloživim i nepoželjnim i o obnovljivim energetskim izvorima. Mislim da sam uspeo da objasnim u kome grmu leži zec. Ako sam uspeo da objasnim. Najpre smo divanili o Ilonu Masku i solarnoj energiji. Jesu njegove solarne ploče i solarni crep fenomenalni izvori, ali će vremenom račun da ispostavi abrazija, odnosno prirodna erozija, jer kad nema sunca ima kiše, a sa kišom, pored žaba ponekad pada i pesak iz Sahare. Na drugoj strani, video sam i proračune da samo komadić Sahare može da zadovolji energetske potrebe čitave Zemlje. Naravno, kao i u bilo čemu drugom postoji i problem. Neću pominjati da će opet Arapima da se zalomi premija, nego da je muka u skladištenju i distribuciji, a o naplati eksploatacije takvog sistema da ne govorim.


Posebna je priča o vetrenoj energiji. Samo bi košava mogla da izduva pola potreba Srbije. Međutim, priča je bila o istoj toj energiji u Oklahomi, mogli bi čudo da izvuku iz Tornado Alley, ali muku muče i sa gasom i naftom za koje nikako da reše transport, pa se proizvođači bore protim vetra. Negde iz rukava su izvukli i argument da će transportni sistem vetrene energije da ugrozi satelitsku kontrolu poljoprivrednika nad uzgojem svojih zasada! Sad su i seljaci protiv.


Ipak, ja bih istakao da obnovljive energije ima na pretek, ali da se sezonsko kolebanje tih izvora kosi sa prednošću stabilnog sistema transporta hidro i termo energije u svetu. Za uspešnu zamenu trebaće nam sasvim novi sistem distribucije energije.
Never argue with stupid people, they will drag you down to their level and then beat you with experience. - Mark Twain.

Meho Krljic

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Re: Energetika juče, danas, sutra
« Reply #119 on: 01-08-2018, 07:51:20 »
Evo nečeg što se nadovezuje na ovaj Skalopov post:
The world's largest solar farm rises in the remote Egyptian desert

Meho Krljic

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Re: Energetika juče, danas, sutra
« Reply #120 on: 13-09-2018, 04:24:32 »

scallop

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Re: Energetika juče, danas, sutra
« Reply #121 on: 13-09-2018, 10:54:45 »
Dok forum ZS ponovo ne potone u gomilu gluposti, nešto sasvim drugačije.


Sasvim je zgodan zaključak klimatskog modela da će wind and solar farms uvećati šansu za kišu i porast vegetacije u Sahari. Ne bih sada o tome da je više uradio jedan domorodac sa oboda Sahare koji 30 godina sadi drveće i gura pustinju unazad. Mnogo zgodnija je jedna moja nenapisana priča iz vremena kad se sve kucalo na mašini. A svideće se i Mići.


Tih godina je Energoprojekt ugovorio sa Gadafijem istraživanje mogućnosti eksloatacije voda koje 30.000 godina imaju trasu od kišnih šuma Konga. Nisam siguran da je Gadafi imao ideju da revitalizuje pistinju, nego pre da iskoristi taj potencijal na brzaka.


I tako, izbušili naši niz piezobunara i prema ugovoru vršili nadzor četiri puta godišnje. Sve je bilo u redu dok neki javaš ekspert nije došao na ideju da dva puta ne meri, nego da vrednosti ekstrapoliše. Naravno, Gadafi ih ulovio i otkazao ugovor bez plaćanja ugovorenih suma novca. Uvek smo bili sposobni da sami sebe zajebemo.


No, nastranu istinita priča, ideja moje nenapisane priče je bila da se od te vode podigne sistem veštačkih oaza i tako smanji toplotni pritisak na pustinju i dozovu kiše. I tako, sad jedino domorodac sadi šumu, a klimatolozi procenjuju da bi efekat smanjenja osunčane površine pustinje izazvao isti efekat. :x
Never argue with stupid people, they will drag you down to their level and then beat you with experience. - Mark Twain.


mac

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Re: Energetika juče, danas, sutra
« Reply #123 on: 04-11-2018, 20:52:54 »
Bližimo se torijumskim nuklearkama..

https://youtu.be/bcjYwxrUERg

Meho Krljic

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Re: Energetika juče, danas, sutra
« Reply #124 on: 19-02-2019, 06:07:11 »
China wants to put a solar farm in space by 2025 
 
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According to China's state-backed Science and Technology Daily, Chinese scientists plan to build and launch small power stations into the stratosphere between 2021 and 2025, upgrading to a megawatt-level station in 2030 and a gigawatt-level facility high above the earth before 2050. Without atmospheric interference or night-time loss of sunlight, these space-based solar farms could provide an inexhaustible source of clean energy. The China Academy of Space Technology Corporation claims such a set-up could "reliably supply energy 99 per cent of the time, at six-times the intensity" of solar installations on earth.
China's proposal suggests converting solar energy into electricity in space, before beaming back to Earth using a microwave or laser and feeding into the grid via a ground receiving system.



Meho Krljic

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Re: Energetika juče, danas, sutra
« Reply #127 on: 11-05-2019, 06:13:34 »
Three Mile Island Nuclear Plant To Close, Latest Symbol Of Struggling Industry
 
 
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The company says the plant has been losing money for years. The nuclear industry generally has struggled to compete with less expensive electricity generated from natural gas and renewable energy. 
 


Meho Krljic

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Re: Energetika juče, danas, sutra
« Reply #129 on: 29-05-2019, 07:52:50 »
Od ovoga za sada nema ništa, ali zamislimo a Google u neko dogledno vreme uspe i razvije postupak za hladnu fuziju. Kompanija koja u ovom trenutku kontroliše ogroman deo svetskog protoka informacija bi držala patent na najvažne dostignuće u energetici u ovom veku...

Google revives controversial cold-fusion experiments





Meho Krljic

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Re: Energetika juče, danas, sutra
« Reply #134 on: 08-07-2019, 07:52:27 »
Safer Nuclear Reactors Are on the Way

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Manufacturers such as Westinghouse Electric Company and Framatome are hastening development of so-called accident-tolerant fuels that are less likely to overheat—and if they do, will produce very little or no hydrogen. In some of the variations, the zirconium cladding is coated to minimize reactions. In others, zirconium and even the uranium dioxide are replaced with different materials. The new configurations could be slipped into existing reactors with little modification, so they could be phased in during the 2020s.

Meho Krljic

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Re: Energetika juče, danas, sutra
« Reply #135 on: 08-07-2019, 08:08:22 »
A onda ima i ovakvih ideja:

This former playwright aims to turn solar and wind power into gasoline

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Synthesizing gasoline, instead of refining it from oil, isn't a new idea. German chemists in the 1920s discovered they could turn coal into carbon monoxide (CO) and hydrogen—a combination known as synthesis gas. Catalysts, along with heat and pressure, could then transform synthesis gas into gasoline and other liquid hydrocarbons.
But McGinnis's setup requires no heat, pressure, or coal. It uses only air, water, and electricity, which can come from the sun or wind. And with those renewable resources becoming ever cheaper, he's betting he can deliver gasoline more economically—and far more cleanly—than companies that must find oil, drill for it, ship it, and refine it.
Several other startups and academic labs are pursuing the same dream. "There has been a lot of progress in the last few years" in turning CO2 into more-complex compounds, says Peidong Yang, a pioneer in the field at the University of California, Berkeley.
Yet many of those efforts have stumbled over the expensive, energy-intensive steps needed to separate the hydrocarbons from the water they are produced in. Prometheus relies instead on a proprietary carbon nanotube membrane sieve that it says readily parts the hydrocarbons from water. "If they indeed have a low-energy separation process, that solves a big problem," Yang says.

Meho Krljic

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Re: Energetika juče, danas, sutra
« Reply #136 on: 11-07-2019, 11:15:46 »
Mića može ovde da se oglasi sa komentarom na verodostojnost i slično, ako ima volje:


Kurije de Balkan: U Srbiji planirano više od 850 MHE, ugrožavaju 1000 km reka

Meho Krljic

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Re: Energetika juče, danas, sutra
« Reply #137 on: 18-07-2019, 07:43:07 »
Škotima ne ide baš sve na ruku, ali vetar, toga barem imaju:

Scotland just produced enough wind energy to power all its homes twice over

Meho Krljic

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Re: Energetika juče, danas, sutra
« Reply #138 on: 20-07-2019, 05:38:22 »
Berkeley becomes first U.S. city to ban natural gas in new homes 
 
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 “It’s an enormous issue,” Harrison told The Chronicle. “We need to really tackle this. When we think about pollution and climate-change issues, we tend to think about factories and cars, but all buildings are producing greenhouse gas.”

Meho Krljic

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Re: Energetika juče, danas, sutra
« Reply #139 on: 21-07-2019, 05:14:52 »
Startup Aims to Tackle Grid Storage Problem With New Porous Silicon Battery 
 
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The idea behind the XNRGI battery is an unconventional one, depicted in a two-minute explainer video and five-page white paper [PDF] from the company. The etched silicon wafers, which are later coated with lithium and other metals to form anodes and cathodes, contain forests of micro-sized batteries on each silicon wafer. Think of each “micro-battery” as an elongated hollow box with a 20 x 20 micron footprint. The cathode and anode are the top and bottom half of that hollow box, separated by some distance from each other. No individual micro-battery, Hallquist says, contains enough charge current to form substantial dendrites or other structures that could arc the positive and negative ends of the battery.
 
 

And each 12-inch silicon wafer consists of some 36 million of these vertical “micro-batteries” machined into the wafer’s surface. Which, as the explainer video argues, decreases the charge time of the macro-battery (made up of many micro-batteries) as well as the manufacturing cost of the technology, as it’s based on already scaled-up silicon fabrication processes used in computer chip manufacturing today.
 

Meho Krljic

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Re: Energetika juče, danas, sutra
« Reply #140 on: 28-07-2019, 13:02:01 »
Ko će pre da uništi reke Zapadnog Balkana? 
 
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Evropska komisija zato smatra da bi regionalni projekti na Zapadnom Balkanu trebalo da se fokusiraju na obnavljanje već postojećih velikih hidroelektrana, a da se samo u ograničenom broju slučajeva razmotre velike grinfild opcije (investiranje u potpuno novu kooji tek treba da se preuređuje, bez korišćenja postojeće infrastrukture).
 

Meho Krljic

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Re: Energetika juče, danas, sutra
« Reply #141 on: 20-08-2019, 07:36:04 »
Quelle surprise!!!!!!


Three Years Later, the French Solar Road Is a Total Flop

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It's too noisy, falling apart, and doesn't even collect enough solar energy.

mac

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Re: Energetika juče, danas, sutra
« Reply #142 on: 20-08-2019, 10:16:42 »
Thunderf00t je od samog početka pokazao da to ne može da radi. Povremeno bi se vratio na tu temu, sa sve više podsmeha, a sve manje strpljenja.

Meho Krljic

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Re: Energetika juče, danas, sutra
« Reply #143 on: 23-08-2019, 07:47:29 »
Ne znam ni šta da kažem na ovako uobličen naslov i tekst:

Solar Power Is Now as Inexpensive as Grid Electricity in China

Mislim, sve to implicira da su Kinezi grdne svinje ako kolko danas popodne ne pozatvaraju sve elektrane na ugalj itd. Al dobro, bias na stranu, ovo je možda značajan podatak...


Meho Krljic

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Re: Energetika juče, danas, sutra
« Reply #145 on: 15-09-2019, 05:26:57 »
Generating Light from Darkness 
 
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Summary 
 
A large fraction of the world’s population still lacks access to electricity, particularly at night when photovoltaic systems no longer operate. The ability to generate electricity at night could be a fundamentally enabling capability for a wide range of applications, including lighting and low-power sensors. Here, we demonstrate a low-cost strategy to harness the cold of space through radiative cooling to generate electricity with an off-the-shelf thermoelectric generator. Unlike traditional thermoelectric generators, our device couples the cold side of the thermoelectric module to a sky-facing surface that radiates heat to the cold of space and has its warm side heated by the surrounding air, enabling electricity generation at night. We experimentally demonstrate 25 mW/m2 of power generation and validate a model that accurately captures the device’s performance. Further, we show that the device can directly power a light emitting diode, thereby generating light from the darkness of space itself.