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« Suntech Begins Construction of Thin-film Facilities | Main | Using Biochar in Soils Traps Carbon and Increases Crop Yields »

June 01, 2007

Comments

amazingdrx

Seems kind of strange to tout this and ignore the proven 39% efficiency attained with 10 sun concentration verified by NERL testing. Concentrating solar gets very little aknowledgement.

I think it is because the big capital push is on cell fabrication rather than efficient application. kind of similar to battery development versus electric car application.

RoySV

To your comment on your remark about nit picking, .5% percent efficiency improvement from a base of 18% is more like 2.8% more power. Anyway, I'm sure we all would love to just see either of these fabrication methods actually producing cells we could all buy.

Re concentrating solar PV, don't concentrating schemes lag badly on cloudy days and also have many more maintenance issues re lenses?

BTW, has anyone looked deeper into the RSI Silicon claims to a break through in silicon production for PV cells?
http://thehopeinitiative.com/news/solar_silicon_solution_2.html

mds

CPV gets attention, but it's the newer kid on the block and may not be able to compete with reduced thin film CIGS and high production volume thin film Si cost-wise in the future. CPV does have the obvious advantage if you want more power from less solar exposed area. Maybe both will co-exist this way. Guess we'll see.
This is the old guard here. The big players and still the lion's share of PV are multi-crystalline Si or crystalline Si. Nice to see they are still improving. Think that Mitsubishi has a fair claim when they qualify it as "practical". There's a big difference between efficiency measured in the lab and efficiency of a production item.
Hey, check this out for CPV:
http://www.physorg.com/news99904887.html
"results are particularly encouraging since they were achieved using a new class of metamorphic semiconductor materials"
"predict that with theoretical efficiencies of 58% in cells with more than three junctions using improved materials and designs, concentrator solar cells could achieve efficiencies of more than 45% or even 50% in the future"

DRX
SpectroLab has broken the 37% limit, achieving 40.7% in their cells. Delta Electronics claims "over 35%" using these cells in their CPV panel:
http://thefraserdomain.typepad.com/energy/2007/03/delta_electroni.html
Where are you getting 37%? Sorry to be picky, but I've been trying to keep track.

disdaniel

"Re concentrating solar PV, don't concentrating schemes lag badly on cloudy days and also have many more maintenance issues re lenses?"

LOL--I love people that expect solar to work in cloudy weather...also not all CPV requires lenses...there are this little things called mirrors that work equally well.

disdaniel

ROYSV "Re concentrating solar PV, don't concentrating schemes lag badly on cloudy days and also have many more maintenance issues re lenses?"

LOL--I love people that expect solar to work in cloudy weather...also not all CPV requires lenses...there are this little things called mirrors that work equally well.

mars

Is there a site/paper/book that compares, as quantitatively as possible, the polySi vs. single-crystal Si vs. CIGS vs. CPV ?

Anybody think there are any fundamental reasons why one or the other simply can't take off (scale)?

Professor Matt

I came across these three articles which are of interest! RE:

1.)Mitsubishi Heavy Industries, one of the biggest industrial companies in the world that makes lots of large heavy and very high quality components for nuclear plants - has set up a special office to go out and get orders for the parts from around the world.

Nuclear power plants have design lives of about 40 years, but often the operators replace the large components before then (sometimes increasing generation capacity) and the re-license them to operte longer. Almost all the plants in the USA are licensed for 60 years life now. New plants are designed to have the large components replaced once during a 60-year design life.

Anyway, Mitsubishi heavy already have a large part of this market, they can only see it getting bigger and they want more.



click here for the full story

2.)TVA in the US looking at completing build of unfinished reactor

The Tennessee Valley Authority have summitted an environmental report to US regulators showing that there would be almost no environment impact from them completing construction of the Watts Barr 2 reactor - which they stopped constructing in 1985 because electricity demand then was lower than expected. With electricity demand rising in the US TVA have already restarted one reactor, and are seriously considering completing the Watts Bar 2 plant and building another reactor on their Bellafonte site.

Of course, whilst the completion of the plant would have no environmental impact the operation of the plant would have a major environmental benefit, as its output would avoid the emission of million tonnes of carbon dioxide each year.


Click here for the full story

and 3.) French nuclear giant Areva has put together a group of utitilites that want to build its EPR design nuclear power plant in Great Britain, but the company that holds most of the nuclear sites in the UK, British Energy, is backing all of the horses in the race and keeping its cards close to its chest!


go to the full story


industrial forklifts

I'm sure we all would love to just see either of these fabrication methods actually producing cells we could all buy.

Keith

generic valtrex

the authors are my life and the quality of them is of great importance especially in security issues and I have family who is above all the most important

Oil Additive

An oil additive is used to improve the base oil (or oil "base stock") into a better performing lubricant.

Business Energy

Wondered how much electricity you are actually using? We use a lot and pay a ton (PG&E still paying off for deregulation misadventure). I've thought about moving to solar but want to be sure it's not a heavy investment that displaces only a fraction of use.

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