לט יטידור הצרמ - iwwa.co.il · 110 105 100 91 80.5 70 77.2 73.7 70.2 56.5 49.1 65.6...
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רודיטי טל : מרצה
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מצוי - NPSH חישוב
Hbברומטרי
Hרום טופוגרפי
H ∆בצנרת יניקה
Hvלחץ אדים
P0הפרש הלחץ
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דוגמאמשאבה שואבת מהכינרת
ø= 10: "קוטר: צינור השאיבהL=250מטר : אורךC=100: פלדהחיכוךמקדם
מטר מפני המים3: גובה ציר המשאבה
נקודות על עקומת העבודה
100150200250ספיקה
60504030עומד
N.P.S.H2.02.42.63.9
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10 – 3.0 – 0.5 – 0.3 = 6.26.2 > 2.0
10 – 3.0 – 1.0 – 0.3 = 5.7 5.7 > 2.4
10 – 3.0 – 1.75 – 0.3 = 4.954.95 > 2.6
10 – 3.0 – 2.5 – 0.3 = 4.24.2 > 3.9
10 – 3.0 – 2.5 – 0.7 = 3.83.8 < 3.9
100602.0
150502.4
200402.6
250303.9
250303.9
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V1
V2H= V²2-V²1
2g V=√2gH
g=9.81
V2= n×π×D60
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ספיקה3000170020002850
115.865.677.2110300
110.562.673.7105350
10559.670.2100400
95.854.363.991450
84.74856.580.5500
73.741.849.170550
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110
105
100
91
80.5
70
77.273 .7
70 .2
56 .5
49 .1
65 .662 .6
59 .6
54 .3
48
41.8
115 .8
110 .5
105
95.8
84 .7
73 .7
63 .9
40
50
60
70
80
90
100
110
120
1 2 3 4 5 6
מקור 2850 2000 1700 3000
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תודה על ההקשבה