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191 results on '"Greaves, Deborah"'

38. A Jacket-Frame Mounted Oscillating Water Column with a Variable Aperture Skirt.

Author

Pérez-Collazo, Carlos, Greaves, Deborah M., and Iglesias, Gregorio

Subjects
WIND waves, OFFSHORE wind power plants, WIND power, WAVE energy, SKIRTS
Abstract

During the last decade jacket-frames have emerged as the main kind of substructure for bottom-mounted offshore wind farms in intermediate water depths. With the offshore wind industry moving towards deeper waters, the predominance of jacket-frames is expected to increase in future years. Multipurpose platforms combining wind and wave energy are proposed as an innovative solution to enhance the sustainability of offshore wind energy. In this research, a multipurpose platform is investigated with a novel feature in its oscillating water column (OWC) wave energy converter—a variable geometry skirt. A comprehensive physical modelling campaign was carried out using a 1:50 scale model. The performance of the OWC and its interaction with the wave field were investigated under four different skirt aperture angles. It was found that the skirt aperture angle plays a significant role in the capture-width ratio and the pneumatic mean power of the OWC. The best performance was obtained with a skirt aperture angle of 140 deg. More generally, these results prove that the variable-geometry skirt is a promising innovation for hybrid wave-wind systems mounted on jacket-frame substructures. [ABSTRACT FROM AUTHOR]

Published
2023
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41. Fashion, Textiles And Cosmetics: Banning 'forever Chemicals' In Europe And The US

Author

Greaves, Deborah

Subjects
Consumer goods -- Composition -- Environmental aspects -- Health aspects, Government regulation, Business, international
Abstract

What are PFASs and how are they used? Per- and poly-fluoroalkyl substances ('PFASs'), known as 'forever chemicals' are a class of synthetic chemicals that are used extensively in a wide [...]

Published
2023

48. UK perspective research landscape for offshore renewable energy and its role in delivering Net Zero

Author

Greaves, Deborah, Jin, Siya, Wong, Puiwah, White, Dave, Jeffrey, Henry, Scott, Beth, and Wigg, Ross

Abstract

This paper sets out the role of offshore renewable energy (ORE) in UK targets for Net Zero greenhouse gas emissions by 2050 and provides a review of the research challenges that face the sector as it grows to meet these targets. The research challenges are set out in a Research Landscape that was established by the ORE Supergen Hub following extensive consultation with the ORE community. The challenges are divided into eight themes, each challenge is described, and current progress is summarised. The progress of the ORE sector in recent years has seen huge cost reductions, which have encouraged the great ambition for the sector seen in UK Government targets. However, in order to meet these critical targets and achieve Net Zero, further innovations and novel technologies will be needed and at pace, driven forward by new research and innovation. The strategy of the Supergen ORE Hub in framing the research and innovation activities within a community-developed research landscape and working together across disciplines and with close collaboration between academia and industry is a necessary component in achieving the ambition of sustainable energy generation.

Published
2022

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