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Effektiviseringspotential inom industrisektorn: Energibesparing vid frekvensstyrning av centrifugalpumpar – en fallstudie
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
2013 (Swedish)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The project was performed at Siemens

Industry Drive Technologies with the

objective to provide actual values for

the energy savings potential within

Siemens scope of practice.

In Sweden the electrical drives stand

for about 30 % of the total electricity

consumption and about 60 % of the

electricity consumption within the

industry. During the pre-study phase

electrical drives with pump applications

were identified as large energy users.

Because of this a case study at one of

Siemens customers, Stora Enso Fors was

performed. The system that was evaluated

during the case study was a throttled

system with a centrifugal pump for

pumping pulp.

The results yielded that a saving of

over 50 % could be achieved by replacing

the throttle valve with a variable speed

drive, a frequency converter. The

payback period was two years and two

months and the present value for the

total life cycle cost of the variable

speed system was 662.566 SEK lower than

for the throttled system. As a

consequence, Stora Enso Fors is advised

to invest in a frequency converter for

regulation of the system.

The general conclusion is that a focus

on system efficiency is the most

important factor in energy efficiency

projects and that the system regulation

method has a large impact on the overall

system losses and hence its efficiency.

Energy efficiency potential for

throttled systems with centrifugal pumps

is large and significant economical

savings can be made through investments

with short payback time.

Place, publisher, year, edition, pages
2013. , 48 p.
Series
UPTEC ES, ISSN 1650-8300 ; 13035
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:uu:diva-207090OAI: oai:DiVA.org:uu-207090DiVA: diva2:646564
Educational program
Master Programme in Energy Systems Engineering
Supervisors
Examiners
Available from: 2013-12-18 Created: 2013-09-09 Last updated: 2013-12-18Bibliographically approved

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