A1 Journal article (refereed), original research

Centrifugal compressor efficiency improvement and its environmental impact in waste water treatment


Open Access publication

Publication Details
Authors: Viholainen Juha, Grönman Kaisa, Jaatinen-Värri Ahti, Grönman Aki, Ukkonen Petri, Luoranen Mika
Publisher: Elsevier
Publication year: 2015
Language: English
Related Journal or Series Information: Energy Conversion and Management
Volume number: 101
Start page: 336
End page: 342
Number of pages: 7
ISSN: 0196-8904
eISSN: 1879-2227
JUFO-Level of this publication: 2
Open Access: Open Access publication
Location of the parallel saved publication: http://urn.fi/URN:NBN:fi-fe2018052324474

Abstract
Energy costs typically dominate the life-cycle costs of centrifugal compressors used in various industrial and municipal processes, making the compressor an attractive target for energy efficiency improvements. This study considers the achievable energy savings of using three different diffuser types in a centrifugal compressor supporting a typical end-use process in a waste water treatment plant. The effect of the energy efficiency improvements on the annual energy use and the environmental impacts are demonstrated with energy calculations and life-cycle assessment considering the selected compressor task in the waste water aeration. Besides the achievable energy saving benefits in the wastewater aeration process, the presented study shows the influence of the additional material needed in the diffuser manufacturing on the total greenhouse gas emissions of the compressor life-cycle. According to the calculations and assessment results, the studied diffuser types have a significant effect on the compressor energy use and environmental impacts when the compressor is operated in the aeration task. The achievable annual energy savings in this case were 2.5-4.9% in comparison with the baseline scenario. Also, the influence of the additional material and energy use for manufacturing the diffuser are insignificant compared with the avoided greenhouse gas reduction potential.

Last updated on 2019-23-01 at 09:57

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