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Limiter les déperditions thermiques
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5 Terms
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1
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Compacité des bâtiments
C = Surface paroi / Volume
Surface en m² et Volume en m³
2
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Matériaux de construction
Parois de matériaux utilisés dans la construction : Parpaing, ossature en bois, Brique Monomur, Brique de terre crue.
\
Isolation des parois :
\
\-Isolation intérieure : réaliser simplement et rapidement des économies d’énergies.
\
\-Isolation extérieure : supprimer les ponts thermiques et d’obtenir un haut niveau de performance.
3
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Grandeurs thermiques caractéristiques des matériaux
La Résistance thermique R :
R = e/λ avec e en m et λ en W/m.K et R en m².K/W
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La résistance thermique totale :
R totale = R1 + R2 + R3 + R4 + ...
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Le coefficient de transfert thermique ( U ) :
U = 1/R avec U en W/m².K
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La déperdition thermique ( D ) :
D = U x S = (1/R) x S avec D en W/K et S surface de la paroi en m²
4
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Parois vitrées
Permettent l’arrivée de l’éclairage naturel et des apports solaires passifs. Mais provoquent pertes thermiques.
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Type de vitrage : Simple vitrage, Survitrage, Double vitrage, Double vitrage VIR, Triple vitrage.
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Apport solaire passif : Manière simple et efficace de chauffer un logement.
5
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Etancheité des bâtiments
Etanchéifier un bâtiment consiste à éliminer toutes les fuites d’air parasites passant au travers de son enveloppe.
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Une bonne étanchéité contribue à la performance énergétique de la maison et au confort.
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