ANDRITZ AtroHydrodynamic screw turbines

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ANDRITZ Atro hydrodynamic screw turbinesEfficient, rugged, and environmentally friendly

The facts

Water flow up to 10 m³/s

Head up to 10 m

Efficiency up to 92%

Output up to 500 kW

Fish-friendly

Do you own water rights as an individual,

a company, or a local authority? Then a

lucrative source of energy is available to

you at no cost. Don‘t let this potential

simply run down the drain any longer.

An ingenious idea from Greek antiquity

was the source of inspiration for this tech-

nology: The Archimedean screw made

water flow uphill. The hydrodynamic screw

turns that principle around and uses the

position and energy difference of falling

water to generate power.Head (m)Hydrodynamic screw diameter (m)

4000350030002500200015001000

Driv

e po

wer

(kW

)

50

100

150

200

250

300

350

400

1,51,0 2,0 2,5 3,0 3,5 4,0 4,5 5,0 5,5 6,0 6,5 7,0 7,5 8,0 8,5 9,0

10,00m3/s 8,00m3/s 6,00m3/s

4,00m3/s

3,00m3/s

2,00m3/s

1,50m3/s

1,00m3/s0,75m3/s

0,50m3/s0,25m3/s

Inta

ke c

apac

ity m

3 /s

10

9

8

7

6

5

4

3

2

1

0

1000 1500

1

0

Installation angle 22°

30°

50

1,51,0

Your advantages Rapid amortization thanks to small

investment and low operating costs

High efficiency, even with fluctuating

water levels and low volumes of water

Efficient use as from an output of 1 kW,

even with low hydropower potential

Rugged, wear-resistant, trouble-free,

and durable technology

Self-regulating system that adapts

automatically to the water volume and

mains frequency

Low-maintenance plant that requires

very little cleaning

Operates with coarse screen only (no

fine screens needed)

Fields of application As substitute for waterwheels and

turbine plants

As residual water screw turbine in an

existing spillway or a weir system

At former irrigation weirs

At the clear water outlet from sewage

treatment plants

At the cooling water outlet from ther-

mal power stations

At diversion power plants on flowing

water

Back-filled steel trough (WU)In a hydrodynamic steel turbine with a back-filled steel trough,

the screw turbine body is placed in a concrete structure

together with the trough, and the trough shell is back-filled

with concrete. The drive unit and switchgear are mounted on

a concrete structure. This design provides for maximum oper-

ating reliability with low cost for maintenance and care.

Self-supporting trough (WUF)

In a self-supporting trough variant, there is no need to back-fill

the steel trough with concrete. The lower bearing is mounted

on the trough and the forces are transferred to the trough

structure. The drive unit and switchgear are mounted on a

concrete structure.

Compact system (WKU)In this case, the hydrodynamic screw turbine is placed in a

self-supporting trough. The complete unit is a self-supporting

steel structure with integrated drive unit. The baffle plate is

already integrated into the steel trough, which has an open

top. Thus compact system is secured to strip foundations

prepared by the customer. A central support must be provided

as from a blade length of approximately 11.0 m. The customer

then only needs to provide the inlet and outlet areas for the

screw turbine.

Compact tube screw (WKR)In this case, the body of the screw turbine rotates in a

closed tubular shell. The complete unit is a self-supporting

steel structure with an integrated drive unit. The customer

must provide the inlet and outlet areas for the screw turbine.

Particularly suitable for low heads, e.g. clear water outlet from

sewage treatment plants.

SustainabilityEvery kilowatt-hour generated by a

hydrodynamic screw means around 1 kg

less CO2 polluting the environment. Fish,

other creatures, and floating particles

pass through the hydrodynamic screw

unharmed. What is more, the quality of

the water in deeper bodies of water is

improved thanks to oxygen enrichment.

Fish friendlyIn addition to being very suitable for adapt-

ing the screw turbine and trough to the

natural surroundings, the hydrodynamic

screw turbine also allows fish to pass

through it without coming to any harm.

There is no need for the filter screens

needed in small turbine systems as

protection against floating objects. All

that is required is a coarse screen through

which floating particles and, more impor-

tantly, fish can pass unharmed.

Conclusion by the experts“The efficiency of the hydrodynamic

screw turbine compared to other small

hydropower systems of this magnitude

(turbines, waterwheels) is [...] similar or

better. However, the partial load efficiency

can be considered a special advantage

that still makes very efficient use of the

hydraulic energy available, even at low

inflow volume. This is not easy to achieve

in plants of a comparable size.”

Source: Extract from an expert opinion on determination of efficiency by the Technical University of Kaiserslautern

AutomationReliable, economic and safe

Your hydropower plant should operate fully

automatically and reliably without any per-

sonnel present, and you would like to check

the plant status and your power generating

data online on your smartphone?

This is possible both with a standardized

design (compact, premium line) and with a

complete customized solution, e.g. with in-

tegration of the entire weir system.

Our competenceA team with decades of experience in

generating electricity from hydropower will

develop the best solution for your spe-

cific case. With the complete engineering

work, high-grade materials, manufacture in

our own works, commissioning, customer

training, and service features, you have a

whole range of resources at your disposal

to guarantee that your hydropower plant is

highly profitable.

ANDRITZ hydrodynamic screw turbine controller AHCThis unit controls and protects advanced, scalable technology on an

industrial scale. The following modules can be integrated into this unit

if required:

Integrated vibration monitoring to detect undesirable situations

High-resolution, long-term archiving for status analysis

Integrated logging of electrical measurements

Webcam integration

Alerts on mobile phone by SMS

Reliable remote access, remote maintenance facility

Detailed process visualization

ANDRITZ Atro GmbHMax-Brod-Strasse 290471 Nuremberg, GermanyPhone: +49 (911) 998120Fax: +49 (911) 813 7646andritz-atro@andritz.com

Close to our customers

Atro.STP.02.en.03.14

www.andritz.com

All data, information, statements, photographs and graphic illustrations in this leaflet are without any obligation and raise no liabilities to or form part of any sales contracts of ANDRITZ AG or any affiliates for equipment and/or systems referred to herein. © ANDRITZ AG 2014. All rights reserved. No part of this copyrighted work may be reproduced, modified or distributed in any form or by any means, or stored in any database or retrieval system, without the prior written permission of ANDRITZ AG or its affiliates. Any such unauthorized use for any purpose is a violation of the relevant copyright laws. ANDRITZ AG, Stattegger Strasse 18, 8045 Graz, Austria