Alternative Power

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Re: Alternative Power

Post by impar » Fri Mar 08, 2019 10:37 am

Greetings!
Even in a warmer Europe, wind and solar could still keep the lights on
Barring infrastructure-destroying extreme weather, that is

https://www.theverge.com/2019/3/6/18253 ... rgy-europe
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Re: Alternative Power

Post by impar » Fri Mar 15, 2019 10:40 am

Greetings!
New fuel cell material can run efficiently in reverse, storing energy
While we've been able to do this before, we couldn't do it this efficiently.

https://arstechnica.com/science/2019/03 ... ng-energy/
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Re: Alternative Power

Post by impar » Tue Apr 09, 2019 9:16 am

Greetings!
Oil-wealthy Norway faces a political crossroads as climate concerns grow
Norway's sovereign wealth fund grew to $1 trillion with oil. Now, times are changing.

On Saturday, the leader of Norway's Labor Party said the party would stop pushing for oil exploration in the country's ecologically sensitive Lofoten Islands, according to Bloomberg. Norway is a major oil producer, pumping more than 1.6 million barrels of oil per day from its oil-rich offshore areas.
...
https://arstechnica.com/tech-policy/201 ... enewables/
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Re: Alternative Power

Post by impar » Sat Apr 27, 2019 10:56 am

Greetings!
The hydrogen fuel strategy behind Nikola’s truck dream
Water electrolysis, not methane reformation, will drive heavy-duty refueling plan.

https://arstechnica.com/cars/2019/04/th ... uck-dream/
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Re: Alternative Power

Post by impar » Fri May 03, 2019 8:47 am

Greetings!
Highly efficient thermoelectric generation, but only in the cold
In graphene, electrons can efficiently concentrate heat and generate electricity.

This being Ars, I expect that many readers are familiar with Peltier coolers, which make use of something called the thermoelectric effect and use electrical power to pump heat. The nice thing about the thermoelectric effect is that it works both ways: a temperature difference can generate electrical power. The problem, of course, is that generating electricity this way is about as efficient as a teenager cleaning house.

But if you choose the right materials, it doesn't have to be that way. Recent research shows that it might be possible to convert heat energy to electrical energy with an efficiency in the range of 15-20 percent. If that can actually be realized, it would be a truly incredible advance.
...
https://arstechnica.com/science/2019/05 ... -the-cold/
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Re: Alternative Power

Post by Tabajara » Fri May 03, 2019 10:53 am

impar wrote:
Fri May 03, 2019 8:47 am
Greetings!
Highly efficient thermoelectric generation, but only in the cold
In graphene, electrons can efficiently concentrate heat and generate electricity.

This being Ars, I expect that many readers are familiar with Peltier coolers, which make use of something called the thermoelectric effect and use electrical power to pump heat. The nice thing about the thermoelectric effect is that it works both ways: a temperature difference can generate electrical power. The problem, of course, is that generating electricity this way is about as efficient as a teenager cleaning house.

But if you choose the right materials, it doesn't have to be that way. Recent research shows that it might be possible to convert heat energy to electrical energy with an efficiency in the range of 15-20 percent. If that can actually be realized, it would be a truly incredible advance.
...
https://arstechnica.com/science/2019/05 ... -the-cold/
As the temperature for it to run efficiently is close to absolute zero, this can be a way to generate power in space. Maybe it can exist as a backup/complementary power generator to solar cells.
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Re: Alternative Power

Post by Tabajara » Wed May 15, 2019 2:36 pm

A cool article on a solar power home installation:
Don't skimp on the power supply: a 20 kW solar installation reviewed, part one
My house has a TDP

by Colton Westrate — 5:00 PM on April 22, 2019

There are a lot of reasons I decided to have a big honkin' solar array installed on my roof. I'll get to the tangible ones shortly—backed by cold, hard data. The main reason that comes to mind, though, is less concrete. It's a feeling, or an instinct; a desire to realize the expectations of my 20th-century childhood as a 21st-century adult. This is something I've wanted even before I plopped down my first solar power plant as an 11-year old SimCity 2000 mayor. My infatuation with solar arrays has grown.

Now, I understand that the emotional investment I have in this venture isn't something everyone is going to share. Still, it's an undeniable factor in my decision-making process. My parents were promised an inevitable fusion-powered, robot-filled, smart-home by science fiction when they were kids. Hanna-Barbera's vision of the future may not have come to pass, but I want my daughters to grow up in that futuristic fantasy, so it's up to me to deliver on that dream.
https://techreport.com/review/34541/don ... d-part-one
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Re: Alternative Power

Post by impar » Fri Jun 07, 2019 11:55 am

Greetings!
Creative thinking: Researchers propose solar methanol island using ocean CO₂
Desalination, electrolysis, CO2 capture, methanol synthesis: all running on solar panels.

https://arstechnica.com/science/2019/06 ... %e2%82%82/
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Re: Alternative Power

Post by impar » Mon Jun 17, 2019 11:35 am

Greetings!
After June fires, energy group says hydrogen is future’s fuel
Causes of explosions in California and Norway are still under investigation.

https://arstechnica.com/science/2019/06 ... ures-fuel/
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Re: Alternative Power

Post by impar » Sun Jun 23, 2019 6:41 pm

Greetings!
After 40 Years of Searching, Scientists Identify The Key Flaw in Solar Panel Efficiency
...
A new study outlines a material defect in silicon used to produce solar cells that has previously gone undetected. It could be responsible for the 2 percent efficiency drop that solar cells can see in the first hours of use: Light Induced Degradation (LID).
...
https://www.sciencealert.com/scientists ... -searching
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