Nanotechnology and the future of energy

By Sergio Ferreira / Published on Mon, 2007-02-26 13:09

Paul Holister is currently writing a book about ’Nanotechnology and the Future of Energy’. On an interview to the Club of Amsterdam, he describes the benefits of nanotechnology and the revolution it is likely to cause in the energy sector. It will change dramatically the old-fashioned way in which we currently use energy.

Anti-fouling paints for wave or tidal power, materials with higher tolerance for radiation in nuclear reactors, improvements in strength-to-weight ratio of materials used in blades of wind turbines, lenses to focus light on silicon photovoltaic panels or even developments in fuel cell and battery technology are just a few examples of nano-influence.

But when it comes to the discussion about the old and new energy, he stresses that all the alternative scenarios involve a mix of technologies and energy sources. This will inevitably lead to a far more complex system than we have now, placing the grid as the biggest challenge. Hence the phrase ‘intelligent grid’.

He mentions that the grid we now take for granted exists only as consequence of our historical dependence on fossil fuels, is grossly inefficient, and will be dramatically challenged by localized generation in the mixed-energy-source scenario. Yet, another question arises, the amount of energy we will need to transfer from place to place in an economically viable way.

He mentions that the classic answer to the challenge would be hydrogen, but the real solution would be the development of high-load superconducting cables, perhaps made of carbon nanotubes.

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Comments

a textbook example

By Hans De Keulenaer / Published on Mon, 2007-02-26 17:33

Dear Sergio:

A textbook example of the confusion between conversion losses in the power station and network losses. Networks are actually quite efficient. According to this report, network losses are around 7% of electricity generated in Europe and USA, but some systems, such as Germany have around 4% losses. Superconducting grids, cooled to cryogenic temperatures or hydrogen grids with all their conversion losses between hydrogen and electricity will be extremely challenged to achieve such performance.

Moreover, distributed generation (DG) does not necessarily reduce network losses. If DG is used for localising electricity production, network losses decrease, but this works only up to a certain level. Beyond that, DG may lead to electricity produced in one segment of the low-voltage network, and used in another, with increased network losses.

Regards,

Hans De Keulenaer

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