Climate in the 21st Century

Will Humankind see the 22nd Century?

  • Not a fucking chance

    Votes: 44 27.5%
  • Maybe. if we get our act together

    Votes: 42 26.3%
  • Yes, we will survive

    Votes: 74 46.3%

  • Total voters
    160

Roger A. Shrubber

Well-Known Member
Solar prices are falling even more and other countries are starting to make them too, then there are the recent breakthroughs in perovskite solar cells that increase their longevity, lower their costs and increase their efficiency. The only thing missing is cheap energy storage and that should arrive in a variety of forms pretty soon.

Prices falling as demand increases is unusual, it is often the other way around. Solar is the cheapest form of power generation now and it is about to get much cheaper. Solar can also take advantage of long-distance high voltage DC power transmission and cities on the east coast can be powered by solar farms in the Midwest during peak power demand in the early evening.


World's Largest Solar Manufacturer Is Fueling a Price War

(Bloomberg) -- The world’s largest solar manufacturer slashed prices for a key component as growing capacity in the sector intensifies cost competition.

Chinese company Longi Green Energy Technology Co. cut wafer prices by as much as 31% on Monday. Wafers are silicon squares that are wired up and pieced together to form solar panels.

The reduction comes after solar silicon prices have plunged by almost half since early February. A slew of new factories have ramped up production, ending a shortage of the material that disrupted the industry’s supply chain last year.

Longi President Li Zhenguo warned last week that aggressive expansion in the solar supply chain could lead to excess capacity that forces more than half the companies in the industry out of business in the next few years.

Longi shares fell as much as 2% in Shanghai on Tuesday. Shares of TCL Zhonghuan Renewable Energy Technology Co., its top competitor in the wafer space, were little changed in Shenzhen.
what he means is that America and the rest of the world will be able to buy them domestically soon, and the half of manufacturers that will go out of business are the ones in china...Boohoo, bitches, you stole the tech to make them anyway.
 

printer

Well-Known Member
Japan PM Unveils $25B Plan to Tackle Birthrate Crisis
Japan's prime minister unveiled a $25 billion plan on Thursday to expand support for young people and families in a bid to help raise the country's plummeting birthrate.

Larger direct subsidies for those with children and more financial help for education and prenatal care are on the cards, along with the promotion of flexible work styles and paternity leave.

Fumio Kishida said he was proposing "policies to tackle the falling birthrate on an unprecedented scale" as well as steps to "increase income for the young, and the child-rearing generation".

"We will move forward with these measures to fight the falling birthrate without asking the public to bear a further burden," he told ministers, experts and business leaders gathered to discuss the issue.

While many developed countries are struggling with low birthrates, the problem is particularly acute in Japan.

It has the world's second-oldest population after Monaco, and its relatively strict immigration rules mean it faces growing labor shortages.
The country of 125 million recorded fewer than 800,000 births last year, the lowest since records began, while the cost of elderly care soared.
At Thursday's meeting, Kishida said he wanted to budget roughly 3.5 trillion yen ($25 billion) over the next three years for the policies.

The drive has drawn criticism, however, for its failure to identify funding sources other than spending cuts elsewhere and improving the economy.
 

DIY-HP-LED

Well-Known Member
Now here is something with potential, use it to both cool and extract power from solar panels to increase their longevity and increase their efficiency. Perhaps a heat pump could be a use or extracting geothermal energy.


 

printer

Well-Known Member
Now here is something with potential, use it to both cool and extract power from solar panels to increase their longevity and increase their efficiency. Perhaps a heat pump could be a use or extracting geothermal energy.


Am I missing something here? They have the current (in the video) flowing from one end of the silicon to the other. From my understanding the voltage produced is across the junction of the two metals.
 

DIY-HP-LED

Well-Known Member
Am I missing something here? They have the current (in the video) flowing from one end of the silicon to the other. From my understanding the voltage produced is across the junction of the two metals.
A thermocouple works like that, but in this case those nano whiskers are at the same wavelength as the infrared they intercept. For instance, let's say you want to extract heat from a length of pipe, you could build your array with short whiskers at the hot end and longer ones at the cool end. It would work like a turbine that expanded in size as the gas cooled. It is like solar panel for infrared the way I understand it and the process can work either way, it can perhaps best be described as an antenna that works in the nanometer range and can both receive and transmit.
 

printer

Well-Known Member
A thermocouple works like that, but in this case those nano whiskers are at the same wavelength as the infrared they intercept. For instance, let's say you want to extract heat from a length of pipe, you could build your array with short whiskers at the hot end and longer ones at the cool end. It would work like a turbine that expanded in size as the gas cooled. It is like solar panel for infrared the way I understand it and the process can work either way, it can perhaps best be described as an antenna that works in the nanometer range and can both receive and transmit.
I understand the Seebeck Effect. I do not get what you describe from the article. I looked up the paper and it is a pre-print and has not been peer reviewed but working at NIST she must know something. From the diagrams in the paper I still do not get the mechinism.







 
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DIY-HP-LED

Well-Known Member
I understand the Seebeck Effect. What you describe is nothing to do with it. You do not describe what actually creates the electrical energy.
I never looked too deeply into it, but the whiskers are the same wavelength as the infrared and act as individual diodes. When I was a kid, I turned a crystal radio into something that could harvest small amounts of power from an AM radio signal, but you need a germanium diode since silicon won't do for such a low power application. These whiskers appear to be tuned to infrared frequencies.

Like I said, I never bothered to bone up on this particular effect, but others were working on it for a while and the breakthrough appears to be in fabricating the required nanostructures from materials that have the right properties.
 

printer

Well-Known Member
I never looked too deeply into it, but the whiskers are the same wavelength as the infrared and act as individual diodes. When I was a kid, I turned a crystal radio into something that could harvest small amounts of power from an AM radio signal, but you need a germanium diode since silicon won't do for such a low power application. These whiskers appear to be tuned to infrared frequencies.

Like I said, I never bothered to bone up on this particular effect, but others were working on it for a while and the breakthrough appears to be in fabricating the required nanostructures from materials that have the right properties.
I used to work with thermocouples daily and learned a lot about them (forgot most of it by now though). One thing I get is that the voltage is developed across the junction. Even a solar cell needs the wires hooked up across the junction. I do not see a mechanism causing a current to flow through the silicon.

Found the paper but have no time to read it at the moment.

 

DIY-HP-LED

Well-Known Member
I used to work with thermocouples daily and learned a lot about them (forgot most of it by now though). One thing I get is that the voltage is developed across the junction. Even a solar cell needs the wires hooked up across the junction. I do not see a mechanism causing a current to flow through the silicon.

Found the paper but have no time to read it at the moment.

I think we need to think in terms of antennas and not so much in terms of junctions and band gaps. As the frequency increases and the wavelength decreases, making antennas for it gets progressively more difficult because they have to be more accurately made to receive and transmit efficiently. I was reading about this method a few years ago, but fabricating the nano structures consistently, cheaply and of the right materials was the issue. I have at best a fuzzy understanding of it and will look into it more, if it ends up being practical for anything. If it can harvest heat and be incorporated in a silicon solar panel, then it could both supplement power production and cool them.
 

cannabineer

Ursus marijanus
I used to work with thermocouples daily and learned a lot about them (forgot most of it by now though). One thing I get is that the voltage is developed across the junction. Even a solar cell needs the wires hooked up across the junction. I do not see a mechanism causing a current to flow through the silicon.

Found the paper but have no time to read it at the moment.

A paper with a different title and author.

What I gathered is that he’s describing a computational model, not a physical experiment. The physics are beyond me, but they reference thermoelectric effects without describing.
 
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DIY-HP-LED

Well-Known Member
Awww... ...you mean this is going to be harder than I thought? I'll save it for later then.
If it is of practical value, we will hear more about it including theory, but my take on it is it works like a tuned antenna where voltages are induced by EM radiation. I was reading in the past that such a technology would mean super-efficient solar panels, but making the nano pillars in optical ranges would be even more challenging with shorter wave lengths. It's the cooling effect that caught my attention and it might be used as a backing for solar panels to both cool them and increase efficiency by converting heat into electricity. We could have multi-layer solar panels of perovskite, silicon and this stuff to extract more energy from the solar spectrum and increase both efficiency and longevity.
 

DIY-HP-LED

Well-Known Member
Awww... ...you mean this is going to be harder than I thought? I'll save it for later then.

A little easier on the eyes, still does not tell me what I want to see. I'll wait until they develop it fully where us mere mortals can understand it.

Here is what I was thinking about and read about before, dunno what became of the idea. Rectennas


 

DIY-HP-LED

Well-Known Member
A bit more on optical rectennas



Optical rectenna with wide wavelength coverage from a hollow resonator coupled with a metal–insulator–metal tunnel diode
Abstract
This study proposes an optical rectenna that combines a hollow resonator with a metal–insulator–metal (MIM) tunnel diode that is capable of photoelectric conversion (at various visible and infrared wavelengths). It enables the conversion of thermal radiation with different peak wavelengths, such as sunlight and thermal radiation (from heat sources in various temperature ranges), into electric power. The MIM tunnel diode was placed on the wall of a hollow resonator. It rectified the induced current generated by the resonance of the magnetic field. The photoelectric conversion capability of the proposed device applied to visible light is experimentally demonstrated in this study.
 
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printer

Well-Known Member
Insurers are fleeing states due to climate realities, not ‘anti-woke’ bullies
A hostile letter from a group of “anti-woke” U.S. state attorneys general is targeting major insurers that have signed up to the Net-Zero Insurance Alliance.

The alliance was created to help insurers as a sector think about climate risk and net-zero goals. It functions much like the U.S. Chamber of Commerce or the National Association for Manufacturers in America, with work on standards and goals. The alliance was not considered controversial until Republican activists decided anti-environmental, social and governance and anti-climate actions could potentially win votes and influence electoral outcomes.

On net-zero goals, the May letter complains that: “The push to force insurance companies and their clients to rapidly reduce their emissions has led not only to increased insurance costs but also to high gas prices and higher costs for products and services across the board, resulting in record-breaking inflation and financial hardships for the residents of our states.” The letter goes on to attack the alliance’s net-zero targets, warning of possible antitrust action.

The attacks appear to be working.

The Net-Zero Insurance Alliance has begun to hemorrhage members, losing almost 50 percent of its members in the last few weeks. Its chair, the French firm AXA, bailed. Other firms joined the exodus. Tokio Marine Holdings Inc., Japan’s largest insurer, exited. Lloyd’s of London  jumped ship. Spain’s Mapfre leaped. As did Japan’s SOMPO. Munich Re also took to the lifeboats.

The alliance’s future looks bleak for the present.

Republican state attorneys generals have won — right?

Wrong.

What the insurers were doing in the alliance, exchanging views, considering pathways and net-zero measurements, has nothing to do with U.S. or European Union antitrust law.

The firms are responding to being bullied by exiting, but they will not change their crucial orientation toward net-zero goals. The travails in the alliance do not mean that these companies, which are profit-focused, risk-centric, mathematics and science-driven, will stop gauging climate risks and acting accordingly. These firms’ very existence requires careful assessment of climate risks, current and future.

Republican politicians cannot change the climate and related insurance risks, which the firms must factor into their business decisions. Threatening letters can only go so far.

All insurers and reinsurers across the globe are adjusting their models, canceling policies and exiting markets.

Take the decision by State Farm, the largest insurer in California, not to write any new policies in the state. Why? Because catastrophic risks are rising too fast to insure them profitably. AIG has also taken this same step. These and other risk-sensitive insurers understand that they must stop offering policies to ensure their firm’s profitability.

The alternative is bankruptcy.

Last year in Florida, six insurers went bust and were unable to pay policy owners’ claims for repeated extreme weather disasters. A seventh went belly up in 2023 after the latest Hurricane.

The situation is dire in Louisiana, too, where eight insurers went bust last year.

If homeowners can get flood insurance at all, the costs are set to just get higher and higher. Ultimately parts of the United States — Miami, the Florida Keys, New Orleans — will become uninsurable.

This is reality-based economics driving sensible commercial decisions. Bullying letters from lawyers cannot change these alarming weather facts and climate risks.

Republican attorneys general may have the Net-Zero Insurance Alliance in temporary disarray. But climate facts and hard-headed business decisions cannot be avoided.

California’s weather extremes will not get better, only worse.

Hurricanes that hit Florida, Louisiana, Texas and elsewhere are today more severe than in the past. The costs borne by the insured and the uninsured will continue to mount.

As the oceans warm, and seal levels rise, costs leap. Recent research estimates the cost at between $120 billion and $500 billion this century, depending on whether the green transition is optimal or not.

There is no prospect of that changing for the better. Hotter, windier, wetter, drier and more destructive summers are in our future.

For instance, a new study forecasts that a possible multiday heat wave blackout in Phoenix could send half of the city to the emergency room. Thousands could die; the societal and economic costs of such a tragedy would be immense. This dire forecast echoes the horrific opening of the book “The Ministry for the Future.”

State attorneys general, if they really care about their constituents’ futures and want to ensure better economic prospects and outcomes, should start suing the worst greenhouse gas polluters, the firms and actors making an increasingly bad situation worse. State attorneys general should be pursuing stringent net-zero goals in their states, not badgering insurers. They should be changing the local rules and regulations, toughening building standards, cutting local and city-level GHG emissions, changing incentives and punishing freeloaders and those who would risk a livable tomorrow for a fast buck today.

Will Republican state attorneys general shift focus and start addressing climate risks directly? Perhaps not today, but surely soon. Voters will demand as much as climate risks mount, overtaking the foolish pursuit of insurers who understand what a hot-house future looks like, and what must be done about it.
 

printer

Well-Known Member
A bit more on optical rectennas



Optical rectenna with wide wavelength coverage from a hollow resonator coupled with a metal–insulator–metal tunnel diode
Abstract
This study proposes an optical rectenna that combines a hollow resonator with a metal–insulator–metal (MIM) tunnel diode that is capable of photoelectric conversion (at various visible and infrared wavelengths). It enables the conversion of thermal radiation with different peak wavelengths, such as sunlight and thermal radiation (from heat sources in various temperature ranges), into electric power. The MIM tunnel diode was placed on the wall of a hollow resonator. It rectified the induced current generated by the resonance of the magnetic field. The photoelectric conversion capability of the proposed device applied to visible light is experimentally demonstrated in this study.
Makes more sense to me, there is an electrical connection on both sides of the junction.



 

DIY-HP-LED

Well-Known Member
Makes more sense to me, there is an electrical connection on both sides of the junction.



I'm not sure if these are two different phenomena or two ways of looking at the same thing, if different, then perhaps a tandem setup could be deployed to increase efficiency. It does present some interesting theoretical possibilities; someone might disrupt the solar business if they can come up with a practical method of fabrication and higher efficiencies. Even with a rectenna though, converting heat into electricity should produce a cooling effect and the whiskers first described appear to work as a heat diode allowing current to pass, but blocking heat and thus enhancing the Seebeck effect with a thermal differential.
 

DIY-HP-LED

Well-Known Member

This is what's REALLY holding back wind and solar

17,139 views Jun 2, 2023 #PlanetA #RenewableEnergy #Grid
Building solar farms and wind parks is one thing. Plugging them into the grid is another. How does our power system need to change to cope with more renewables?
 
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