CONVERSIA ENERGIEI SOLARE IN ENERGIE ELECTRICA
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Transcript of CONVERSIA ENERGIEI SOLARE IN ENERGIE ELECTRICA
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CONVERSIA ENERGIEI SOLARE IN ENERGIE
ELECTRICA EFECTUL FOTOVOLTAIC
ALINA PITU
MIHAELA SANDU
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CUPRINS
• NOTIUNI INTRODUCTIVE• MODURI DE CONVERSIE A ENERGIEI
SOLARE IN ENERGIE ELECTRICA • EFECTUL FOTOVOLTAIC• CELULA FOTOVOLTAICA• SISTEME DE CONVERSIE FOTOVOLTAICA• CONCLUZII SI APLICATII
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NOTIUNI INTRODUCTIVE
• DE CE ENERGIE ELECTRICA IN ENERGIE SOLARA?PURTATORII DE ENERGIE FOSILI SUNT
EPUIZABILI SOARELE DA PAMANTULUI MAI MULTA
ENERGIE INTR-UN MINUT DECAT CONSUMA LUMEA INTR-UN AN
CANTITATEA DE ENERGIE SOLARA ESTE DE 170 DE MILIOANE DE ORI MAI MARE DECAT PRODUCTIVITATEA CELOR MAI MARI CENTRALE
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•MODURI DE CONVERSIE A ENERGIEI SOLARE IN ENERGIE ELECTRICA
• CONVERSIE INDIRECTA FOLOSESTE PRINCIPIUL CLASIC AL
GENERATOARELOR DE ENERGIE ELECTRICA INLOCUIND COMBUSTIBILUL TRADITIONAL CU ENERGIA SOLARA
• CONVERSIA DIRECTA 2 TIPURI DE EFECTE :FOTOVOLTAICETERMOELECTRICE
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EFECTUL FOTOVOLTAIC
• 1839-EDMOND BEQUEREL
• FIG 2
• FIG 3
• EFECTUL FOTOVOLTAIC-JONCTIUNEA P-N DINTR-UN SEMICONDUCTOR
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CELULA FOTOVOLTAICA
• Converteste lumina soarelui in electricitate prin interactiunea fotonilor si electronilor intr-un semiconductor
• Curentul net prin jonctiune:
• “Coordonatele” puterii maxime :
]1[0 TU
U
sds eIIIII
T
MTgM U
UUUU 1ln
TM
M
SSM UU
U
I
III
01
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• Randamentul conversiei:
• Factorul de utilizare:r
MM P
P
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CONCLUZII SI APLICATII• Eficienta celulelor cu film subtire cis (cupru-indiu –seleniu) este de 18,8%
• Filmul are o grosime de 4 microni in comparatie cu 300 de microni cat au celulele fotovoltaice obisnuite;
• Aaplicatii: Calculatoare de buzunar; Ceasuri cu cuart; Avionul solar Challenger; Complexul de inot din Satul Olimpic din Georgia Atlanta-360 KW In prezent sunt >500000 locuinte care folosesc energia solara ca energie
electrica.
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•MODURI DE CONVERSIE A ENERGIEI SOLARE IN ENERGIE ELECTRICA
• CONVERSIE INDIRECTA FOLOSESTE PRINCIPIUL CLASIC AL
GENERATOARELOR DE ENERGIE ELECTRICA INLOCUIND COMBUSTIBILUL TRADITIONAL CU ENERGIA SOLARA
• CONVERSIA DIRECTA 2 TIPURI DE EFECTE :FOTOVOLTAICETERMOELECTRICE
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EFECTUL FOTOVOLTAIC
• 1839-EDMOND BEQUEREL
• FIG 2
• FIG 3
• EFECTUL FOTOVOLTAIC-JONCTIUNEA P-N DINTR-UN SEMICONDUCTOR
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CONVERSIA ENERGIEI LUMINOASE IN ENERGIE ELECTRICA SE FACE PRIN DISPOZITIVELE NUMITE GENERATOARE
FOTOVOLTAICE =CELULE FOTOVOLTAICE (FOTOCELULE)