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Gang193
@Gang193
May 2019
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Bonjour,
Pouvez vous m'aidez pour cette exercice de dm:
Merci d'avance
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scoladan
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Bonjour,
1) débit d = 7 L.s^-1 = 7x3600 L.h^-1 = 25200 L.h^-1
soit 25,2 m^3.h^-1
==> V = 8 x 25,2 = 201,6 mm^3
2) V = piR^2 x h ==> h = V/piR^2 = 201,6/pix36 = 1,778 m
3) Phydro = pgDelta(h) x Q = 1000 x 9,81 x (70+12) x 7.10^-3 = 5691 W
4) PMéca = Phydro/rendement = 5691/0,70 = 8044 W
5) Pélec = Pméca/rendement = 8044/0,90 = 8938 W
6) Pfournie = Pélec/rendement = 8938/0,99 = 9028 W
7) S = 9028/140 = 64,5 m^2
8) Reporter les puissances calculées
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Verified answer
Bonjour,1) débit d = 7 L.s^-1 = 7x3600 L.h^-1 = 25200 L.h^-1
soit 25,2 m^3.h^-1
==> V = 8 x 25,2 = 201,6 mm^3
2) V = piR^2 x h ==> h = V/piR^2 = 201,6/pix36 = 1,778 m
3) Phydro = pgDelta(h) x Q = 1000 x 9,81 x (70+12) x 7.10^-3 = 5691 W
4) PMéca = Phydro/rendement = 5691/0,70 = 8044 W
5) Pélec = Pméca/rendement = 8044/0,90 = 8938 W
6) Pfournie = Pélec/rendement = 8938/0,99 = 9028 W
7) S = 9028/140 = 64,5 m^2
8) Reporter les puissances calculées