Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Hydrodynamic capacity study of the wave-energized Baltic aeration pump: General applicability to the Baltic Sea and location study for a pilot project in Kanholmsfjärden
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering.
2008 (English)Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

To counteract one of the most urgent environmental issues in the Baltic Sea; eutrophication, excessivealgal blooms and hypoxia, a proposal to use wave energy to pump oxygen-rich surface water towardsthe sea bottom is investigated. Proposals have suggested that 100 kg of oxygen per second is needed tooxygenate bottom water and enhance binding of phosphorus to bottom sediments. This corresponds to 10 000 m3/s of oxygen-rich surface water. This thesis investigates a wave-powered device to facilitatethis oxygen ux. Results give expected water flow rates between 0.15 - 0.40 m3/s and meter breakwater.The mean specic wave power for the analyzed wave data is calculated to be between 3 - 4 kW/m wavecrest and the median to 1 kW/m. This study indicate, however, that the energy uxes in the BalticProper are signicantly higher. The study gives that the wave climate of the Baltic Sea is suffciently intense to facilitate vertical pumping with a feasible number of breakwaters. A full-scale implementationin the Baltic Sea would require some 300 to 1 200 oating breakwaters of a length of 50 m each. Thetotal cost is roughly estimated to 170 - 680 million EURO. The study also concludes that the interleavingof surface water should be constrained to a relatively small vertical distance from the outlet depth(20 - 30 m) and not stir up deep water to the surface. Wave modelling for the proposed pilot locationKanholmsfjärden indicate that this bay is not large enough to permanently produce a favorable waveclimate. It is, however, still an interesting location consistently to its vicinity to Stockholm and relativelylong measurement series.

Place, publisher, year, edition, pages
2008. , 37 p.
Series
TRITA-LWR Master Thesis, ISSN 1651-064X ; LWR-EX-08-05
Keyword [en]
Baltic Sea, Oxygenation, Wave power, Breakwater, Halocline ventilation
Keyword [sv]
Östersjön, Syresättning, Vågkraft, Vågbrytare, Haloklin omrörning
National Category
Water Engineering
Identifiers
URN: urn:nbn:se:kth:diva-35214OAI: oai:DiVA.org:kth-35214DiVA: diva2:425606
Subject / course
Water Resources Engineering
Educational program
Master of Science in Engineering - Urban Management
Uppsok
Technology
Supervisors
Examiners
Available from: 2012-02-16 Created: 2011-06-21 Last updated: 2012-02-16Bibliographically approved

Open Access in DiVA

LWR_EX_08_05(2902 kB)1022 downloads
File information
File name FULLTEXT01.pdfFile size 2902 kBChecksum SHA-512
8f2e26a4bdccc19600fd8dd418d8f6cabf163a39727fed1568f2278bd3d08c332faa723690e1f5630377c0c5f6f460e29faa7a184a8532cf96dec1ee6ea70cfc
Type fulltextMimetype application/pdf

Other links

http://www2.lwr.kth.se/Publikationer/PDF_Files/LWR_EX_08_05.PDF

Search in DiVA

By author/editor
Carstens, Christoffer
By organisation
Land and Water Resources Engineering
Water Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 1022 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 218 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf