bonjour,
je croyais naivement qu'une certaine autonomie prevalait dans l'acatama (type solaire), mais visiblement, ca tourne au fioul (il faut quand meme sortir plusieurs MW). l'info est pas super simple a trouver, mais quelqu'un aurait des sources claires a ce sujet ? merci.
Ça fonctionne bien au pétrole, mais des trucs plus propres que le fuel : LPG (gaz de pétrole liquéfié) et gaz naturel. L'option "énergies renouvelables" est ouverte pour l'E-ELT, et peut être également aussi plus tard pour ALMA.
FAQ VLT/La Silla
Plein d'info là dessus : Toward a “green” Observatory (PDF)How is energy produced at ESO’s Observatories?
A: Energy production is one of the most difficult parts when setting up a remote operation away from the electrical grid. At Paranal, and at ALMA, the electrical power is produced on site by using multi-fuel turbines, which are more efficient than traditional diesel generators and can use "cleaner" fuels such as LPG (liquefied petroleum gas) and natural gas. The generators work in "island mode”, i.e. not connected to a grid. However, due to new opportunities in the energy markets, including Chile, the choice for the E-ELT might include options for the use of renewable energy. In addition, the ALMA power distribution system has been designed to be ready for connection to a renewable energy plant.
Dernière modification par Gilgamesh ; 09/09/2016 à 16h01.
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Bonjour,
L'énergie semble principalement fournie par des générateurs au LPG et gaz naturel. L'ajout d'une composante solaire semble cependant envisagée.
Energy production is one of the most difficult parts when setting up a remote operation away from the electrical grid. At Paranal, and at ALMA, the electrical power is produced on site by using multi-fuel turbines, which are more efficient than traditional diesel generators and can use "cleaner" fuels such as LPG (liquefied petroleum gas) and natural gas. The generators work in "island mode”, i.e. not connected to a grid. However, due to new opportunities in the energy markets, including Chile, the choice for the E-ELT might include options for the use of renewable energy. In addition, the ALMA power distribution system has been designed to be ready for connection to a renewable energy plant.Source: http://www.eso.org/public/about-eso/...lt-paranal/#26In the planning phases of the observatories, both solar and wind power generation were considered. However, it turned out that the costs of this would have been too great. With solar power, for example, the system to store the energy collected during the day for use at night would have been extremely expensive. Finally, as these power sources are not guaranteed to be constantly available, a traditional generator system on site would have been necessary for backup as well. However, as the available technology (and its associated cost) develops, there may be interesting options for the usage of renewable energy in the future.
merci.
j'avais ca :
https://arxiv.org/pdf/1402.2783.pdf
donc, il semble bien que ca "pourrait" fonctionner au GPL, mais que pour l'instant, ca turbine au fioul.
j'en étais sur le cul, hier, quand je me suis posé la question
d'autant que pour un ciel nickel, faire cramer, ne serait-ce que du gpl, pas loin ?!?
Envoyé par blarbapapa
C'est pas ce que je lis dans le PDF que j'ai mis en lien.
A priori c'est 95% de GPL. Donc quasiment pas de suies en sortie. Le diesel c'est anecdotique (carburant auto, utilisation des générateurs de secours pendant la maintenance)
The primary energy consumption at the observatory consists of 95% liquid petroleum gas (LPG) to feed a 2.4 MW
multi-fuel (Diesel and LPG) turbine for the electricity generation. This turbine is also enabled for natural gas (methane)
operation. The remaining 5% go into gasoline and Diesel for local car commuting at the site (2%) and Diesel (3%) for
the electricity generation with 3 back-up Diesel generators of 800 kW each, which are used during maintenance periods
of the turbine. This shows that Paranal relies entirely on a non-renewable energy supply.
Dernière modification par Gilgamesh ; 09/09/2016 à 18h01.
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shame on me !
comme il est presenté comme un papier de prospectives energetiques, je l'ai pris comme tel dans ma lecture diagonale.
le point positif, c'est qu'ils travaillent dessus...
requestion, mais qui a du effleurer les ingenieurs-concepteurs :
une centrale electrique (meme au gpl) qui sort du MW tres proche, meme sans emission de particules, ca ne crée pas de turbulences atmospheriques qu'il faut elles meme corriger par l'optique adaptative ?
Clairement je pense que c'est pour ça qu'on a placé la central énergétique (et toutes les installations connexes) à ~ 1km des instruments.
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