Technology

What are concentrating photovoltaics? One of the ways to increase the output from the photovoltaic systems is to supply concentrated light onto the PV cells. This can be done by using optical light collectors, such as lenses or mirrors. The PV systems that use concentrated light are called concentrating photovoltaics (CPV). The CPV collect light from a larger area and concentrate it to a smaller area solar cell. This is illustrated in Figure 5.1.

Also, from the article - 33.6% efficiency in real-world conditions:

A 60 cell-lens prototype was studied for a year. In "real-world" conditions, CPVs achieved up to 33.6% efficiency. The 36% mark was posted at 167 degrees Fahrenheit. The prototype showed no signs of degradation, according to IE.

Wait for something fucking idiotic like:

"U.S. government to implement 5,000% tax on new solar technology...."

The only thing slowing down the transition from fossil fuels to renewables is the same impediment it has always been: oil money protecting itself.

I am not a scientist so please correct me if I am off base, but did it really take them this long to attempt to focus light onto PV cells using a fresnel lens?

My hobby as a 15 year old was buying broken projectors to harvest the fresnel lenses in the lamp on top. They could focus sunlight so powerfully that you could burn shit. I didn't do that, surprisingly. I was like Marge Simpson, I just thought they were neat.

I'm not sure what to think about the Fraunhofer institute in general. They have made some nice discoveries/inventions in the past, such as audio compression algorithms and such. That is why i hyped them for a bit.

But they really disappointed me with their writings on solar panels in the past few years.

They said that the efficiency of solar panels today is too low to deploy them widely in practice, which is simply not true. They tried pushing Perovskite solar cells for no reason.

I'm not sure what to think about this article's idea. On one hand, adding lenses to solar parks makes them significantly more complicated and therefore expensive to build. Also, if the parks have complicated physical forms, they're more susceptible to wind, and that could damage them.

On the other hand, yes, adding lenses means you need fewer actual solar panels for the same amount of energy harvested.

I'll therefore put it in the category of inconclusive inventions, together with the idea of adding a motor to the solar panels so they can track the sun. That would also make the solar panels more efficient, but also more complicated and more prone to mechanical failure.

Solar panels are already quite cheap. What we need is much cheaper grid forming inverters so we can stop destabilizing the grid with solar.

https://ieeexplore.ieee.org/document/10938951

This is 36% MODULE efficiency with expensive cooling. 30% actual year long efficiency without it. Requires dual axis tracking. Seems heavy as its very tall/deep.

Headline of cost reduction is very unlikely. Especially on a per acre/fairly large area basis. Dual axis tracking requires more spacing than fixed orientation rows, and loses benefits under cloudy conditions. While power at 7am and 5pm is more valuable when competing against high penetration solar, batteries are now more competitive than tracking, and can serve edge of day and night power needs. Tracking solar tends not to be built anymore, due to low cost of panels. The cooling infrastructure is also not as useful as it is on rooftops because the heat capture has useful benefits for homes.

It is also unclear how this has advantage over parabolic mirror.

Agri PV is a real use case, where more free land means more land use, even if most of it gets more shade, except around noon.

"The lens makes it different from standard solar panels that convert sunlight to energy with average efficiency rates around 20%, per MarketWatch. Fraunhofer's improved CPV cell has an astounding 36% rate in ideal conditions"

Why would I want to compare one panel's average efficiency to another panels efficiency in ideal conditions?

They need changes in laws too. Instead of chewing up open space and farmland I'd rather see more urban areas used like parking lots and industrial sites.

Remember gang, stuff like this means 10-15 years before you see it in market.

Hey it's those guys that invented MP3s.

If I had a penny for every time I heard about new advancements about to revolutionise solar panel technology, I'd have glazed the bloody Sahara with them by now.

Banned in North America in 3... 2...

I thought this has already been done. Guess there's some nuance to it that is above my understanding of it.

Anyhow, advancements in solar are cool in my book.

Oh don't worry, I'm sure the capitalist system will manage to fuck it up somehow.

is it a real thing or an obligatory overestimated result to get grants because the system is fucked?

That is Fraunhofer who are the people most responsible for developing MP3

Wouldn't this be negated by the fact, that the same area of roof now has less actual PV cell on it? Since the light gets concentrated on a smaller area?

US Government - not on my watch....

How does concentrating the sunlight like this not start a fire? Or wouldn’t this at least cause panel electronics to overheat?