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Assessment of Embodied Energy and Carbon Emissions of the Swansea Bay Tidal Lagoon from a Life Cycle Perspective
Mid Sweden University, Faculty of Science, Technology and Media, Department of Ecotechnology and Sustainable Building Engineering.
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In the pursuit of low-carbon, renewable energy sources one option with great potential in the UK is tidal energy. Specifically the proposed construction of the Swansea Bay Tidal Lagoon (SBTL) in South Wales has become one such discussed option. With a potential net annual output of 400 GWh and a 120-year lifetime the scheme represents a long-term and large-scale electricity production option. An assessment of carbon emissions and embodied energy (EE) of the lagoon’s life cycle was carried out. Total lifetime carbon emissions for the SBTL are in the region of 470,000 tCO2e and EE was found to be around 7,800 TJ. The assessment shows that the SBTL has significantly lower emissions per year than the existing National Grid mix and with emissions of around 0.01 kgCO2e/KWh is significantly lower than the UK emissions target of 0.07 kgCO2e/KWh. Energy payback of the SBTL was found to be in the region of 5.5 years. The use of dredged ballast infill sourced from within the area of the lagoon plays an important role in keeping emissions and energy use low; and is a key consideration when planning future tidal lagoon structures.

Place, publisher, year, edition, pages
2015. , 44 p.
Keyword [en]
Life Cycle Assessment, embodied energy, carbon emissions, tidal energy, tidal lagoon, renewable energy, Swansea Bay
National Category
Marine Engineering Energy Systems Ocean and River Engineering Other Environmental Engineering Environmental Sciences Oceanography, Hydrology, Water Resources
URN: urn:nbn:se:miun:diva-25145OAI: diva2:820482
Educational program
International Master's Programme in Ecotechnology and Sustainable Development NEKAA 120 higher education credits
Available from: 2015-07-08 Created: 2015-06-12 Last updated: 2015-07-08Bibliographically approved

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Department of Ecotechnology and Sustainable Building Engineering
Marine EngineeringEnergy SystemsOcean and River EngineeringOther Environmental EngineeringEnvironmental SciencesOceanography, Hydrology, Water Resources

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