concentration photovoltaic solar cells

Forum solar photovoltaic PV and solar electricity generation from direct radiation solar energy.
Christophe
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concentration photovoltaic solar cells




View Christophe » 19/07/07, 12:22

We talked about the principle of concentration of solar radiation on PV panels (see https://www.econologie.com/forums/photovolta ... 82-30.html ), a Calofornian company is developing (and will soon be proposing) concentrator PV panels and therefore high efficiency at m2 (and therefore better financial performance since this is what counts).

The overall yield would be 17%.

datasheet: https://www.econologie.com/cellules-phot ... -3419.html
More: http://www.solfocus.com/technology.html

Home Page: http://www.solfocus.com/
Last edited by Christophe the 24 / 07 / 07, 23: 52, 1 edited once.
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elephant
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View elephant » 19/07/07, 13:38

I just looked at the datasheet. This kind of device is only interesting on a tracker, which works to the degree!
it may be smaller at equivalent power, but I think this kind of machine is of limited application.
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View gilgamesh » 19/07/07, 13:40

Hello,

I wonder what is the energy balance of these breads because usually it takes a huge amount of energy to produce them and especially much more than that they will produce during their life. I looked for this information in the links provided but I can not find it. Anyway it looks good.
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View Christophe » 19/07/07, 13:49

elephant wrote:I just looked at the datasheet. This kind of device is only interesting on a tracker, which works to the degree!


Well, I thought exactly the opposite ...

The parable to recover much more radiation for a full day.

A little like in thermal with vacuum tubes compared to planar sensors. Fool me?

For the energy of manufacture, it is very delicate to find and I just made a subject on this subject a few days ago: https://www.econologie.com/forums/solaire-ph ... t3861.html
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View Obelix » 19/07/07, 15:09

Hello,

To see a panel with the same technology but already industrialized:
http://www.entechsolar.com/

In service for a few years

Obelix
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View elephant » 19/07/07, 17:02

I may be misunderstood, but look at the last graph of the page 2: practically 0% as soon as you are 1,5 ° out of the axis!
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View Alex » 19/07/07, 17:35

Oula!
So yes, this technology is very interesting, but it is not intended to be installed in private homes (at least, not this type of concentrators-).
You actually have to follow the sun, so that means you need plenty of space, and you can't put it stupidly on a roof like in the case of "classic" flat modules.
The area of ​​application is rather remote power generation plants, not to produce electricity at home.

So with regard to the energy balance:
-For a plan module, it takes from 2 to 4 years to produce the electricity that was needed to manufacture the module. In addition, it is considered that during its lifetime, a PV module will produce 8 12 times the same amount of electricity.

-For conversion under concentration, the energy return time is only a few months (well yes, the interest of conversion under concentration is that we use very little PV cell surface. very energy-intensive to manufacture ...).

I still remember that there are still other very interesting aspects on this technology:
-the cost: lower (in the short term) than that of conventional modules, because we replace something that costs expensive (a photovoltaic cell) by something that costs much less (a focus of concentration)
-the yield: it increases when the solar flux is concentrated.
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View Christophe » 25/07/07, 00:01

elephant wrote:I may be misunderstood, but look at the last graph of the page 2: practically 0% as soon as you are 1,5 ° out of the axis!


I have a hard time understanding exactly the legend of this curve but yes you must be right ...
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View Capt_Maloche » 27/07/07, 10:07

I caught this:

Photovoltaic efficiency: record breaking
Quote:
Record performance for solar cells designed in the United States
THE WORLD | 14.12.06 | 15h57

It is a technological feat that will delight the promoters of renewable energies. Boeing-Spectrolab, backed by the US Department of Energy, has just developed photovoltaic modules - which directly transform solar radiation into electricity - whose output, ie the ratio between produced electrical energy and received solar energy, reaches 40,7%. The previous record, set by the same manufacturer, was 37%. Europe, which is developing the Full Spectrum project with which CEA is associated, does not exceed 35,2%.

(the full article here: http://www.lemonde.fr/cgi-bin/ACHATS/ac ... _id=969680 )

This is excellent news for the photovoltaic industry (and for concentrated PV in particular)


your opinion?

Boeing Spectrolab Terrestrial Photovoltaic Cell Exceeds 40% Efficiency
11-12-2006

ST-LOUIS, 6 Dec. 2006 - Boeing today announced that Spectrolab Inc., a subsidiary, has set a new world record in the performance of a concentrated terrestrial photovoltaic cell. By using concentrated sunlight, Spectrolab has demonstrated the ability of a photovoltaic cell to convert 40,7% of the sun's energy into electricity. The United States Department of Energy's National Renewable Energy Laboratory (NREL) has verified the milestone.


"This performance of a photovoltaic cell is the highest level of efficiency that any photovoltaic device has ever achieved," said Dr. David Lillington, President of Spectrolab. "The earth cell we have developed uses the same technological base as our cells for space (...)"

High efficiency multi-junction cells have a significant advantage over conventional silicon cells in concentrator systems because few solar cells are required to achieve the same power output. This technology will continue to significantly reduce the cost of producing electricity from solar energy as well as the cost of materials used in high-power space satellites and for terrestrial applications.

"These results are particularly encouraging since they were made using a new class of metamorphic semiconductor materials, allowing much greater freedom in the design of multi-junction cells for optimal solar spectrum conversion," said Dr. Richard R. King (...). "The excellent performance of these materials suggests even higher yields for future solar cells. "

Spectrolab reduces the production cost of photovoltaic cells by investing in research and works with several domestic and international solar concentrator manufacturers on clean and renewable solar energy solutions. Currently, Spectrolab's ground-based concentrator cells are developing a power of 33 kilowatts in a complete concentrating system in the Australian desert. The company has recently signed multi-million dollar contracts for its high-performance concentrator cells and is planning several new contracts in the coming months.

The development of high efficiency concentrator cell technology has been funded by NREL's High Performance Photovoltaics program and Spectrolab.

Translated by EF4
source: http://www.boeing.com
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View Alex » 27/07/07, 21:24

Capt_Maloche wrote:your opinion?


The translation of EF4 is very approximate! : Cheesy:
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