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Water Forum for the EMA-Region11. – 12. March 2010, Hamburg“Variation der Geschwindigkeit und Drehzahlregelung von Pumpen“
Chakib Chraibi, PSP-X11
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Pumpentheorie und Energieeinsparungen Pumpendurchflussregelung - Warum ist sie nötig?
Beispiel: Wasserverbrauch zuhause
Mitternacht Morgen Nachmittag
Dusche1 Liter pro Sekunde
Den Garten gießen10 Liter pro Sek.
Ein Glas Wasser0,1 Liter pro Sek.
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Volumenstromregelung von Pumpen
M
Drehzahlregelung
M
Ein-Aus-Betrieb
M
Bypassregelung
M
Drosselregelung
+
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Leistung bei den einzelnen Regelverfahren (Annahme: 70% Volumen, = Q2 0,7)
Q2 = 0,7
H2 = 1,0
7,00,1*7,0 =≈P
Ein-Aus
Q2 = 0,7
H2 = 1,22
86,022,1*7,0 =≈P
Drosseln
Q2 = 0,7
H2 = 0,75
53,075,0*7,0 =≈P
FU-Antrieb
PumpenkennliniePumpenkennlinie
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Gründe drehzahlgeregelte Antriebe einzusetzen
� Bessere Prozessführung
� Drehzahl und Volumen/Druck werden dem Prozess angepasst
� Reduktion von Anlauf- und Laststößen
� Geringerer Verschleiß
� Schonung von elektrischen und hydraulischen Netzen
� Energieeinsparung
� Zusatzeffekte bei Zentrifugalpumpen
• Die Maximaldrehzahl nach Bedarf ist frei wählbar
• Reduktion bzw. Vermeidung von Druckstößen
• Problemloser Parallelbetrieb mehrerer Pumpen auch bei sehr flachen Anlagenkennlinien (Regelung der Leistung statt der Drehzahl)
• Vermeidung des „verbotenen“ Bereiches (Kavitation)
• Die Maximallast bestimmt den Maximalstrom, nicht der Anlauf
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Zielvolumenstrom 2,88m³/s ohne Drehzahlregelung oder Stations-Regelventil:
Vollkavitation der Betriebspumpen aufgrund Überlastbetrieb.Zielvolumenstrom kann nicht erreicht werden
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Zielvolumenstrom 2,88m³/s mit Stations-Regelventil:
Erheblicher Energieverlust durch Drosselung (hydraulischeVerlustleistung ca. 1200 kW!). Stationswirkungsgrad lediglich 62%
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Zielvolumenstrom2,88m³/s mit Drehzahlregelung:
Optimaler Betrieb mit geringstem Energieverbrauch. Schonungvon Pumpen, Stromnetz und Anlagenkomponenten
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Vergleich von Wirkungsgrad und Energieverbrauch
Mit Drehzahlregelung
8700Op. Hours
0,020€,$, .. . per kWh
753,121A ctual Energy Cost (x1000)
622,944Min. Requ. Energy Cost (x1000)
Energy Cost
1000
2040 60
80
82,7
Pumping StationEfficiency [%]
1000
2040 60
80
82,7
PumpEfficiency [%]
0,417Specific Energy [kWh/m³]
0,008Specific Cost [€,$,.../m³]
8700Op. Hours
0,020€,$,... per kWh
1002,490A ctual Energy Cost (x1000)
623,761Min. Requ. Energy Cost (x1000)
Energy Cost
1000
2040 60
80
62,2
Pumping StationEfficiency [%]
1000
2040 60
80
83,0
PumpEfficiency [%]
0,554Specific Energy [kWh/m³]
0,011Specific Cost [€,$,.../m³]
Hinweis: Betrieb ohne Regelventil oder Drehzahlregelung nicht möglich (unzulässige Kavitatation)
Energieeinsparung ca.25%!
Mit Regelventil
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Wirkungsgradmessung online von der Pumpe
Information ManagementSystem
Controller
Operator Station
Visualization of efficiency together with process values further
diagnosis
Suction side Delivery side
IOs
Motor Power dT-transmitter <10 mKelvin accuracy
pumpfan
P-transmitter P-transmitterT- sensorT- sensor PTP T
MotorMotor
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Mubarak (Toshka) Egypt –The world largest Pumping Station
24 variable speed pumpstotal capacity of 288 MW (24x12 MW)total discharge of 350 m3/s (21x16.7 m3/s)
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Shuweihat Water Transmission Scheme Abu Dhabi, U.A.E
Double pipeline 1600mm dia each 250 km transfer capacity of 100 million gallons of water per day5x 12-pulse frequency converters 4.7 MW5x 12-pulse frequency converters 690 kW
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SAMRA Wastewater Treatment Plant Jordan
267,000 m³/day
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Kurfalli (Isaköy) Pump Station
145 million m³/a to the new treatment plants at Emerli with their capacity of 600.000 cm³/d.
2 Centrifugal Pumps, 0,75 m³/sec.
8 Centrifugal Pumps, 1,5 m³/sec.
2 Medium Voltage Motors, 2,5 MW
8 Medium Voltage Motors, 5 MW
2 Variable Speed Drives, 2 MW
2 Variable Speed Drives, 5 MW
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Vielen Dank für ihre Aufmerksamkeit!
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