Spanish government will activelly prosecute photovoltaic self generation at homes

31 01 2014

From Vozpopuli, 13-11-07

Los inspectores podrán entrar sin orden judicial en las viviendas que produzcan energía solar

Que tiemblen los ciudadanos que se atrevan a producir energía solar desde sus casas. Una enmienda del PP que hoy será aprobada permitirá a los inspectores acceder a los domicilios particulares sin orden judicial para revisar la legalidad de estas instalaciones. Esta medida, junto a los peajes de respaldo y a las multas de hasta 60 millones de euros, fulmina definitivamente el esperanzador fenómeno del autoconsumo en España.

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Multas de esperpento: fuga nuclear, 30 millones; placas solares ilegales en casa, 60 millones

Arrecian las críticas al Gobierno por sus excesos a la hora de fijar las multas por infracciones graves. Más allá de la ‘Ley Mordaza’, hay sectores como el eléctrico donde las sanciones rozan el esperpento. Según la nueva normativa, aún en proceso parlamentario, tener en casa placas solares no registradas legalmente podría acarrear una multa de entre 6 y 60 millones de euros, por considerarse infracción muy grave, como también lo es una fuga nuclear, cuya pena máxima serían 30 millones

Tumbling prices of solar modules

25 01 2014

By Anne Fischer, Managing Editor, Solar Novus Today

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It was not so long ago that the holy grail of solar pricing was to achieve the price of $1.00 per module. With supply of solar modules far exceeding demand, prices have dropped precipitously, and module costs are now well below $1. According to Greentech Media’s (GTM) recent “PV Technology and Cost Outlook, 2013-2017”, c-Si module prices have fallen approximately 70% in two years.

According to the report “Solar PV Modules – Market Size, Annual Production, Average Price, Competitive Landscape and Key Country Analysis to 2020” from Global Data, solar PV module prices have dropped drastically since 2006, when the average price was $3.8/W. In 2012, the price of a module was $0.91/W, and Global Data analysts expect it to fall further over the coming years, reaching $0.25/W in 2020.

Dropping prices of solar modules translates to lower installation costs. According to the Solar Energy Industries Association/GTM “U.S. Solar Market Insight: Q3/2013” the price of a complete PV installation has dropped 16% over the past year.

And perhaps one of the most optimistic forecasts for the solar industry is the Lux Research report that estimates that utility-scale solar will be cost competitive with natural gas by 2025. At that point, solar will have established itself as a mainstream source of energy.


La factura de la luz en España y las energías renovables

18 01 2014

Estudio realizado por UNEF y apoyado por Greenpeace

¿Lo has visto en el periódico? ¿En la televisión? ¿Quizás en tu portal de noticias preferido? En las últimas semanas las grandes compañías eléctricas se han dedicado a repetir una y otra vez que en tu factura de la luz pagas muchos impuestos que se dirigen, entre otras cosas, a las energías renovables. Ya sabes, para seguir intentando convencerte de que las renovables son caras (ya, se repiten más que el ajo).

Por ejemplo, Iberdrola dice: “De los 51 euros de la factura mensual de un hogar medio, solo 19 euros corresponden a la energía kWh consumida y a las líneas eléctricas para llevarla. El resto, 32 euros, son costes ajenos al suministro eléctrico”. Mienten. Y ASECE les ha denunciado por publicidad engañosa.




Insights to the operation of perovskite solar cells

8 01 2014

This is our new paper in Nano Letters

General Working Principles of CH3NH3PbX3 Perovskite Solar Cells

Victoria Gonzalez-Pedro, Emilio J. Juarez-Perez, Waode-Sukmawati Arsyad, Eva M. Barea, Francisco Fabregat-Santiago, Ivan Mora-Sero and Juan Bisquert

We think we have achieved some important new insights. Here are the conclusions:

We have observed the transport coupled with recombination process in perovskite solar cells by the standard signature of transmission line pattern in the impedance spectroscopy spectra. We studied different types of cells: thin film (TF) devices on the one hand, and nanostructured devices (NS) including a metal oxide framework, on the other. Despite the conspicuous differences of the samples in terms of perovskite material, growth method, sample configuration (nanostructured and thin film) or selective contact to electron, similar behavior has been observed indicating a common and general working mechanism in perovskite solar cells.

The observation of TL allowed us to determine important cell parameters as carrier conductivity, recombination resistance, and diffusion length. The transport rate is nearly the same in the different cells indicating that the dominant transport pathway is the perovskite absorber.

The diffusion length plays a key role in the photovoltaic performance of perovskite solar cells, limiting the active layer thickness to few hundreds of nm. We found that a large diffusion length is achieved in compact film of CH3NH3PbI3-xClx, while the metal oxide nanostructure increases the  of CH3NH3PbI3 perovskite.

The model discussed in this work is highly consistent basically by three facts: i) there are many physical processes producing an arc in an impedance spectra but the observation of the straight line feature clearly indicates the presence of a transmission line or Gerischer impedance, that recognizes coupled transport and recombination and separates the correspondent resistance elements, as we discussed. ii) Diffusion lengths obtained applying our model are in good agreement with the measured ones for thin film CH3NH3PbI3-xClx measured by a completely different technique (time resolved photoluminescence). iii) Perovskite conductivities applying our model are in good agreement with the previously reported ones, also measured by completely different techniques.

The results here reported will contribute to the development of a complete model of the working principles in perovskite solar cells and could have important implications in the optimization and characterization of this technology.

Perovskite team at UJI

Perovskite team at UJI

The presentation and the content

5 01 2014

Benjamin Bratton

We need to talk about TED

Let me tell you a story. I was at a presentation that a friend, an astrophysicist, gave to a potential donor. I thought the presentation was lucid and compelling (and I’m a professor of visual arts here at UC San Diego so at the end of the day, I know really nothing about astrophysics). After the talk the sponsor said to him, “you know what, I’m gonna pass because I just don’t feel inspired …you should be more like Malcolm Gladwell.”

At this point I kind of lost it. Can you imagine?

Think about it: an actual scientist who produces actual knowledge should be more like a journalist who recycles fake insights! This is beyond popularisation. This is taking something with value and substance and coring it out so that it can be swallowed without chewing. This is not the solution to our most frightening problems – rather this is one of our most frightening problems.

So I ask the question: does TED epitomize a situation where if a scientist’s work (or an artist’s or philosopher’s or activist’s or whoever) is told that their work is not worthy of support, because the public doesn’t feel good listening to them?

I submit that astrophysics run on the model of American Idol is a recipe for civilizational disaster