Exemplu Calcul Hidraulic (Pompe) [PDF]

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Zitiervorschau

BREVIAR DE CALCUL HIDRAULIC OBIECTUL 7 - STATIE DE POMPARE NAMOL DE RECIRCULARE SI IN EXCES

Sectiunea 1 - Debite de proiectare mc/zi mc/hr mc/s l/s Q u zi med 5911 246.2917 0.068 68.41 Q u zi max 5904 246 0.068 68.33 Q uz orar max 410 0.114 113.89 Q max ploios 448 0.124 124.44 Sectiunea 2 - Calculul pierderilor de sarcina Conductele de legatura intre decantoarele secundare si SPNRE (functioneaza ambele decantoare) Pierderile de sarcina au fost calculate pe schema cea mai dezavantajoasa. Pierderi de sarcina locale Sectiunea Q max(l/s) DN (mm) Aria (mp) Intrare in conducta 49.78 300 0.0707 Cot 90 deg 49.78 300 0.0707 Vana 49.78 300 0.0707 Iesire in rezervor 49.78 300 0.0707

Bucati 1 2 1 1

ζ v.max(m/s)hr (m) 0.5 0.70 0.019 0.2 0.70 0.015 0.3 0.70 0.011 1 0.70 0.038 Σhr 8.35 cm

Pierderi de sarcina liniare L(m) D(m) λ hl (m) Pierderi de sarcina totale

18.5 0.3 0.015 3.51 cm 0.12 cm

Conductele de legatura intre decantoarele secundare si SPNRE (functioneaza doar 1 decantor) Pierderile de sarcina au fost calculate pe schema cea mai dezavantajoasa. Pierderi de sarcina locale Sectiunea Q max(l/s) DN (mm) Aria (mp) Intrare in conducta 99.56 300 0.0707 Cot 90 deg 99.56 300 0.0707 Vana 99.56 300 0.0707 Iesire in rezervor 99.56 300 0.0707

Bucati 1 3 1 1

ζ v.max(m/s)hr (m) 0.5 1.41 0.076 0.2 1.41 0.091 0.3 1.41 0.046 1 1.41 0.152 Σhr 36.43 cm

Pierderi de sarcina liniare L(m) D(m) λ hl (m)

18.5 0.35 0.015 6.50 cm

Pierderi de sarcina totale

0.43 cm

STATIA DE POMPARE NAMOL DE RECIRCULARE Dimensionare bazin de aspiratie N max 236.95 N min 233.1 L bazin 6.5 B bazin 3.6 Volum util 90.09 Q max 0.127 Timp de functionare 11.87

m m m m mc mc/s min

debit namol de recirculare + namol in exces

Calculul curbei sistemului namol de recirculare Q total Nr. Pompe in funct. Nr. Pompe de rezerva Debit per pompa N max N min Cota refulare Dif. geodezica

0.127 2 1 0.064 236.95 233.1 237.15 4.05

mc/s

mc/s m m m m

Pierderi de sarcina locale Sectiunea DN (mm) Aria (mp) Buc. Cot 90 deg 200 0.0314 Evazare DN200/DN250 250 0.0491 Cot 90 deg DN250 250 0.0491 Debitmetru DN300 300 0.0707 Refulare in bazin 300 0.0707 Clapet antiretur 250 0.0491 Vana manuala 250 0.0491 Vana manuala 300 0.0707 Cot 90 deg DN300 300 0.0707

1 1 2 1 1 1 1 2 5

ζ v.max (m/s) 0.25 2.02 0.2 1.29 0.25 1.29 0.05 0.90 1 0.90 0.8 1.29 0.25 1.29 0.25 0.90 0.25 0.90

Pierderi de sarcina liniara L(m) 90 D(m) 0.3 λ 0.012 Q [l/s] 0 30 60 90 114 140

Mr Ml Mtotal H pompare [s^2/m^5] [s^2/m^5] [s^2/m^5] [m] 78.57 36.76 115.33 4.05 78.57 36.76 115.33 4.15 78.57 36.76 115.33 4.47 78.57 36.76 115.33 4.98 78.57 36.76 115.33 5.55 78.57 36.76 115.33 6.31

1.50

12.00

10.00

8.00 Curba sistem

Punct de functionare

6.00

Curba pompei Series5 4.00

2.00

0.00 -20

30

Punct de functionare grup de pompare Punct de functionare pompa

80

130

Debit Inaltime pompare Debit Inaltime pompare

180

114 5.5 57 5.8

l/s m l/s m

410.4 mc/h 205.2 mc/h

100 140 180 220 260