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Les énergies renouvelables moins chères que le charbon

Article publié le 26 août 2009

Les énergies renouvelables moins chères que le charbon

On ne le cache pas, à TechnoPropres, on évite le charbon, quand on ne le critique pas ouvertement pour la pollution qu’il entraîne. Bien sûr, il y a les développements de la capture et du stockage du CO2, une technologie qui se développe un peu partout et qui pourrait permettre de reconsidérer la question, nous aurons l’occasion d’en reparler. Cependant, mis à part cette technologie, le charbon est l’un des facteurs de risques les plus importants pour le climat au XXIe siècle : il reste l’une des principales sources d’énergie Mais au-delà des arguments écologiques, il y a aussi un argument économique qui commence à être médiatisé contre le charbon, c’est le cas en Australie par exemple, où un récent rapport du CNRS local (le CSIRO), a évalué le coût d’un équipement en énergie renouvelable moins cher que le charbon. Quelques précisions via Treehugger.


Si l’on a longtemps considéré les énergies propres comme coûteuses, c’est bien évidemment parce qu’elles en sont à leurs débuts, quoique les derniers records en date (de taille d’éolienne, de taille de champ, etc.) montrent que l’on entre dans une phase industrielle de développement. Par ailleurs, le coût des matières premières fossiles (charbon, pétrole) n’a pas semblé justifier un changement radical de comportement. Mais même au niveau de prix actuel, le renouvelable commence à être tout à fait compétitif.

L’étude du CSIRO utilise une simulation pour parvenir à satisfaire la demande australienne d’énergie en 2020. Si l’on décide de construire des centrales à charbon, le coût sera de 30 milliards de dollars, contre 27 milliards si l’on passe par un système de plus petites sources d’énergies renouvelables dispersées sur le territoire (voir à ce sujet le concept des micro-sources d’énergie comme la micro-hydroélectricité).

L’élément clé du rapport du CSIRO est l’efficacité énergétique. En utilisant les systèmes de cogénération, de dispersion (limitant donc les frais & déperditions liés au transport de l’énergie d’une grosse centrale) et de smart grid (voir nos posts sur ce concept d’optimisation du réseau électrique par l’informatique), c’est donc un peu d’argent qui peut être économisé, mais surtout des millions de tonnes d’émissions de CO2.

+ le charbon, "une énergie pas très clean"
+ l’appel de l’AIE en faveur de la capture et du stockage du CO2
+ le savoir-faire allemand dans la capture du gaz carbonique

TechnoPropres

Thèmes

CO2 Energies renouvelables Charbon Economie Energies fossiles

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par lio (IP:xxx.xx3.69.69) le 26 août 2009 à 11H19

moins cheres surtout si l’on considere les conséquences (pollution ,rechauffement)de l’utilisation des energies fossiles

votez :
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