Offshore wind to float

In a recent article published in Renewable and Sustainable Energy Reviews, the challenges for the future of off-shore wind were discussed, considering Spain as a case.

The need for floating structures is a clear cornerstone for the development of off-shore wind in countries like Spain, where swallow waters are not convenient or restricted.

The development of these technologies to a commercial level will bridge the difference from on-shore connected windpower and off-shore or off-grid generation. Energy harvesting as discussed in this post with multi-use offshore platforms can be envisioned as a next step.

Picture from Yarik Mishin on freeimages.com

Picture from Yarik Mishin on freeimages.com

Excluding the technological and environmental challenges, there are other hurdles.

As it is highlighted usually, the unstable regulatory framework causes a lack of interest for investment, specially if paired with complicated administrative procedures.

The battery gap

I explained to a friend this week my concept of “battery gap”.

He thinks batteries will not “be enough”, are “too far away” and “too expensive” for grid energy storage… Well, we’ve heard that old story before.

We heard that old belief that solar energy would never be competitive or only represent a small portion of energy generation, right? Or the one that grids had an inherent limit for absorbing renewable power (yes, some people once said it was 15%) Or that to reach a high degree of renewable penetration, the land use would not leave space to grow food… And such.

Well, the DOE has published an update on the accelerated escalation of LEDs, wind, solar, EVs and batteries. The graphs and the facts are impressive.

The difference in price for renewable energy Vs conventional grows quickly. So there is growing “space” to pay for energy storage. We could represent as follows: Sigue leyendo

Spot the solar plant!

Time for a a game?

Now, let’s see, have a look at the following picture and try to find the solar plant:

WP_20141217_15_09_54_Pro

Found it? Sigue leyendo

Sea Energy Harvesting – off-shore

Of course, onshore resources are first.

Of course, it will take a long time before it’s real business, but we can start with the vision…

Where is the most “energy intense” location on earth in terms of wind, solar and other renewable sources? Is it onshore or off-shore?

Let’s see what sea energy harvesting is about…

Derived from Image by http://www.freeimages.com/profile/leonardobc

Concept derived from Image by http://www.freeimages.com/profile/leonardobc

There was in 2011 an interesting research I recommend here, that overlapped the irradiation and the temperature, in order to determine where solar can yield more, given the PV panels are less efficient the higher the temperature. The resulting optimal areas for generation where the Himalayas (not too accessible), the Antarctica (similar to off-shore) and regions in the southern Andes.

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Electric boats and sea energy harvesting

As commented in a recent post on renewable islands, to completely decarbonize islands, it is necessary to use renewables for electricity and heating, together with the electrification of transport. (Actually, electric mobility serves as renewable storage)

By transport I mean electric mobility on land, that is vehicles, rail, buses, but also on the sea. How can we decarbonize sea transport?

No, I’m not proposing getting our hands on the oars or going back to:

Por MKFI (Trabajo propio) [Public domain], undefined

Let’s see how…

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Interconnections and the road to 100% renewable

Last week, ADMIE signed the contracts for the 1st phase of the Cyclades interconnection Project, consisting in 150 kV AC three-phase sea cable from the mainland to Syros island, and from there to Mykonos, Paros and Tinos (see the picture below).

The business case for the interconnection project is impressive. We are talking about an investment of roughly 232 M€ that will save approximately 100 M€ per year, and will avoid the emissions from fuel fired power plants in the islands, increasing the reliability of the grid and the power quality.

Cyclades Project

Why are interconnections important for the sustainability of the grids?

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Hacia dónde va la eólica? Jornada en Madrid

Organizado por: Reed Business Information

Lugar y fecha: Madrid, 13 de Diciembre 2012

Resumen:

Una jornada propuesta por RBI como foro de reflexión sobre el presente y las tendencias futuras de la energía eólica. Se presentaron los últimos desarrollos de los tecnólogos (Acciona y Gamesa), del Cener y la situación según la AEE y APPA. Por mi parte, presenté sistemas actuales de integración y gestionabilidad de eólica de ABB tanto en sistemas interconectados como en microrredes.

Presentación RBI

Quiero destacar el planteamiento de Acciona (a partir del proyecto EOLIA) durante las jornadas, porque es bastante innovador. Dentro del desarrollo de turbinas off-shore de gran potencia están considerando el desarrollo de desalación off-shore y off-grid. Este concepto tiene lo positivo de suprimir o al menos reducir las tuberías y el bombeo de salmuera y de toma de agua bruta, quedando sólo la de bombeo de agua producto a la costa. Para la desalación es posible almacenar agua, con lo que la variabilidad del recurso no afecta a la viabilidad.

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