[pp.int.general] Global heating: 2 degrees of heating is 16 years away

Kenneth Peiruza kenneth at pirata.cat
Wed Jul 25 10:15:51 CEST 2012


US department of energy (you know, those greenpeace hippies) publishes regularly the cost of electricity production.

The cheapest one is advanced combyned cycle, followed by windpower, followed by hydropower, followed by nuclear.

Nuclear and combyned cycle depend on non renewable sources. At present cobsumption rate, uranium peak production will be reached by 2050 and we passed the peak oil almost 6 years ago.

Hydropower has been stable for decades, and windpower is decreasing its price every year. Then... which is the most realistic bet to start reducing CO2 right now? Windpower and planting trees and using vegetable/wood-based matherials in construction, to capture CO2. (Industrial CO2 capture techniques are experimental, these other things had been always working).

Spain has plenty of solar, thermal solar and windpower facilities. As stated by US DoE, windpower is the cheapest one, also here.

I find it weird that so many people proposes his 'prefered renewable energy source' without even checking the science and facts behind it.


The only really cheap and useful usage of solar panels is in warming water, as they don't require much science: a black box with a glass and some pipes. It is mandatory to have such pannels in Barcelona, in all buildings built after 2002.

About solar-thermal towers, yes, they rock, as they produce electricity during night hours, however, they are way more expensive than windpower. AFAIK, there's only 2 of these towers producing commercial electricity this way, and all them are in southern Spain (Abengoa Solar operates them).

If you need electricity for wordwide production and usage, in quantities enough to keep us in 'simmilar energy consumption', use things present worldwide: wind, not sun.

About geothermal, well, looks great, however Swiss gov. Auhorized a company to do ao, and the experiment got cancelled after more tan 400+ earthquakes affeced all the villages in the surrounding area. Iceland is successful in it's usage, but they don't need to dig 1km to use it, so leave geothermal for places with active volcanos, something we miss in most EU zones and even countries...


I'd suggest you to at least read the figures from US DoE, and wikipedia pages about renewable energy production in Denmark, Germany, Spain and Iceland ( worldwide leaders in clean energy production ) before continuing to propose energy sources in this thread, so we can end with arguments like 'I prefer'.

My 2 cents.

Salut!Aza <rata_0071 at hotmail.com> escribió:2012/7/23 Maxime Rouquet <maxime.rouquet at partipirate.org>:
> Isn't the idea of producing energy from heat particularly interesting ?
> Well, there are many places where we could develop geothermal energy,
> but curiously no big energy company is promoting it. Why ? Because they
> all sell a consumable product (petrol, gas, coal, etc.), not simply the
> power plant. Buying a power plant to them is ensuring them we will also
> buy their energy for the next fifty years or so... Therefore, we think
> we should develop such energy sources, even if big energy company do not
> promote them.
>
> We also want to decentralise the energy production. Citizens and local
> communities should be encouraged to exploit geothermal or wind turbine
> energy at their scale, rather than depending on big power plants. (By
> the way, we could get rid of most of the big power lines too...)

Really like this two ideas, solar and geothermal.

Don't like much solar because producing solar panels is energy
expensive, but solar thermal could be a simple, cheap way to produce
energy. And building a generator this way is feasible for individuals
or group with some technical knowledge. Hope OSE has a project for
that soon.

aza
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