#WATEFCON 2018

Water Efficiency Conference5-7 September 2018University of Aveiro, Portugal

PaTPump as Turbine

KSB Bombas e Válvulas

Nuno Aleixo

#WATEFCon 2018

PaT - Application

#WATEFCon 2018

Advantage PaT over turbine

– Standardised product

– Short delivery

– Low-prised

– Can be used as pump as well with high efficiency

PaT vs Turbine

#WATEFCon 2018

Advantage turbine over PaT

– Wide range of control

– Accurate design

– Higher efficiency

PaT - Operating Range

#WATEFCon 2018

PaT / Pump: Operation

#WATEFCon 2018

PumpPlease note:

– Mechanical seals to be independent

on sense of rotation

– Impeller nut retention

Sectional view Pump / Turbine

+H

+Q

+n

- Q

- n

Turbine

+P

- P

+H

Ppe

Ppe.const

HQP

.const

HQP Turb

Turb

PaT / Pump: Operation

#WATEFCon 2018

Ppe

Ppe.const

HQP

.const

HQP Turb

Turb

0.0

0.5

1.0

1.5

2.0

2.5

3.0

-2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0

H / Hopt

Q / Qopt

M = 0

n = 0

1800 min-1

1500 min-1

-1500 min-1

-1800 min-1

Pump nS 25,9Turbine ns 25,4

PaT – KSB Power House

#WATEFCon 2018

PaT – KSB Power House

#WATEFCon 2018

PaT for water pumping

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PaT – for water pumping

#WATEFCon 2018

Pump – gear box – PaT

– PaT: Eta R 300-340

Q = 370 l/s; H = 15 m; = 81%

– Pump: Multitec 65/9-6.1

Q = 16 l/s; H = 190 m; = 74%

Pump as Turbine (PaT) and pump directly coupled via gear

Dam wall

Upstream

Downstream

PaT – Simplified Scheme Bypass

#WATEFCon 2018

Application of PaT

Scheme with bypass

(1) Flow measurement

(2) Control valve

(3) Isolation valve

(4) Pump as Turbine

(5) Start / Stop / Control valve

(6) Generator

(7) Bypass, rapidly opening valve

(8) Pressure measurement

M Pl

M

1 2

3

45

3

6

7

T

G

8

PaT – Pump as Turbine

#WATEFCon 2018

Thank You