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Heat Transfer between the ocean and the seabed: implications for the effective operation of marine high voltage cables.


Project Description

Project Rationale:
The temperature of the sediments that surround buried marine high voltage cables play a critical role in their design, operation and maintenance. These cables are a major component of 21st Century power generation (renewable energy sector, such as wind farms) and transport (HV interconnectors which transfer energy between countries) and properly understanding the environment in which they operate can save £Millions during their life time. At present it is assumed that only conduction of heat from the water column to c. 5 m depth effects the spatial and temporal variation of temperature around these cables. Although this may be true in some places, evidence from studies of offshore coastal water reservoirs suggests the process is driven by both conductive and convective processes. These can be affected by many different processes including the properties of the sediments themselves and the tides and waves of the oceans above. This project will utilise a new multi-year time-series, of in situ thermal measurements from a series of windfarms to test this hypothesis. The implications of this work are much broader than just HV cables - the thermal regime can also control shallow biological and chemical processes.

Funding Notes

You can apply for fully-funded studentships (stipend and fees) from INSPIRE if you:
Are a UK or EU national.
Have no restrictions on how long you can stay in the UK.
Have been 'ordinarily resident' in the UK for 3 years prior to the start of the project.

Please click View Website for more information on eligibilty and how to apply

References

References (3 or fewer)
Hughes et al. 2015. Effect of Sediment Properties on the Thermal Performance of Submarine HV Cables. IEEE Transactions of Power Delivery, 30 (6), 2443-2450.
Miesner et al. 2015. Reconstructing bottom water temperatures from measurements of temperature and thermal diffusivity in marine sediments. Ocean Sci., 11, 559-571
Wilson et al., 2016. Using heat as a tracer to estimate the depth of rapid porewater advection
below the sediment–water interface. J. Hydrology, 538, 743-754

How good is research at University of Southampton in Earth Systems and Environmental Sciences?

FTE Category A staff submitted: 68.62

Research output data provided by the Research Excellence Framework (REF)

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