Energreen


2 November 2003

Panouri solare de randament mare

Înscris în: Energie solară — energreen @ 22:34

Panourile solare furnizeaza o parte foarte mica din energia produsa la nivel mondial, în parte deoarece nu au un randamet foarte mare.

Siliconul cristalin folosit în prezent ofera un randament de 15-16% şi anumite studii cosidera ca limitele lui ar fi atinse în jur de 25%. Deşi alte materiale, cum ar galiul, ofera un randament de 30%, pretul prohibitiv le face potrivite doar pentru explorari spatiale. De aceea, in urmatorul deceniu, nimic nu pare sa ameninte suprematia siliciului.

Cu toate acestea, in ultima vreme tot mai multe firme au reusit sa mareasca randamentul oferit de celulele solare. In martie 2003, BP Solar a anuntat o eficienta de 18,3%, in timp ce Sanyo a scos pe piata o celula cu o eficienta de 19,5%.

Compania “Sunpower Corp.” din California a prezentat in iunie un avion solar, produs pentru NASA si numit Helios, care functiona cu celule solare cu o eficienta de aproape 23%. Acest avion fara pilot a ajuns la altitudinea de aproape 30.000m. Pentru productia de serie, compania a renuntat la cateva procente de eficienta, ajungand la 20% si gasind deja cativa cumparatori.

2 Votes | Average: 10 out of 102 Votes | Average: 10 out of 102 Votes | Average: 10 out of 102 Votes | Average: 10 out of 102 Votes | Average: 10 out of 102 Votes | Average: 10 out of 102 Votes | Average: 10 out of 102 Votes | Average: 10 out of 102 Votes | Average: 10 out of 102 Votes | Average: 10 out of 10 (2 voturi, media: 10 din 10)
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Actionand local

Înscris în: Dezvoltare durabilă, Diverse — energreen @ 22:33
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Turbine eoliene construite ”pe dos”

Înscris în: Energie eoliană — energreen @ 22:31
7 Votes | Average: 9 out of 107 Votes | Average: 9 out of 107 Votes | Average: 9 out of 107 Votes | Average: 9 out of 107 Votes | Average: 9 out of 107 Votes | Average: 9 out of 107 Votes | Average: 9 out of 107 Votes | Average: 9 out of 107 Votes | Average: 9 out of 107 Votes | Average: 9 out of 10 (7 voturi, media: 9 din 10)
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1 November 2003

Centrale eoliene marine

Înscris în: Energie eoliană — energreen @ 22:31
6 Votes | Average: 8.5 out of 106 Votes | Average: 8.5 out of 106 Votes | Average: 8.5 out of 106 Votes | Average: 8.5 out of 106 Votes | Average: 8.5 out of 106 Votes | Average: 8.5 out of 106 Votes | Average: 8.5 out of 106 Votes | Average: 8.5 out of 106 Votes | Average: 8.5 out of 106 Votes | Average: 8.5 out of 10 (6 voturi, media: 8.5 din 10)
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Sisteme de electricitate solara

Înscris în: Energie solară — energreen @ 22:30
1 Votes | Average: 10 out of 101 Votes | Average: 10 out of 101 Votes | Average: 10 out of 101 Votes | Average: 10 out of 101 Votes | Average: 10 out of 101 Votes | Average: 10 out of 101 Votes | Average: 10 out of 101 Votes | Average: 10 out of 101 Votes | Average: 10 out of 101 Votes | Average: 10 out of 10 (1 voturi, media: 10 din 10)
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Reciclarea PET-urilor

Înscris în: Reciclare — energreen @ 22:17
2 Votes | Average: 10 out of 102 Votes | Average: 10 out of 102 Votes | Average: 10 out of 102 Votes | Average: 10 out of 102 Votes | Average: 10 out of 102 Votes | Average: 10 out of 102 Votes | Average: 10 out of 102 Votes | Average: 10 out of 102 Votes | Average: 10 out of 102 Votes | Average: 10 out of 10 (2 voturi, media: 10 din 10)
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Masini care merg cu hidrogen

Înscris în: Energii regenerabile, Hidrogen — energreen @ 22:16
4 Votes | Average: 8 out of 104 Votes | Average: 8 out of 104 Votes | Average: 8 out of 104 Votes | Average: 8 out of 104 Votes | Average: 8 out of 104 Votes | Average: 8 out of 104 Votes | Average: 8 out of 104 Votes | Average: 8 out of 104 Votes | Average: 8 out of 104 Votes | Average: 8 out of 10 (4 voturi, media: 8 din 10)
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