Offshore staff
PERTH, Australia — Bombora Wave Power is entering the final test and assembly phase of the 1.5-MW Pembrokeshire Demonstration Project, as it prepares to validate the world’s most powerful wave energy converter, according to a July 14 Bombora news release.
Rigorous testing of the key sub-systems is underway as the ocean energy specialist prepares to deliver the £20 million (US$24 million) project, financially supported by the European Regional Development Fund (ERDF) via the Welsh Government.
The cell modules, a key element of the firm’s iconic membrane-based WEC system, mWave, are being operated through their final round of design limit testing, before being fitted into the steel foundation structure in Pembroke Dock.
Bombora’s COO Dave Rigg said the project has rapidly gathered momentum in 2022, and the team will soon be ready to fully energize the 1.5-MW mWave in the ocean waves off the Pembrokeshire coastline.
“The project has been progressing at pace, with our specialist mWave cell membranes currently undergoing final tests, with extreme inflation and deflation cycles," he said. "This is the culmination of the full-system testing process involving detailed instrumentation, operation of the valve systems and powering of the PTO [power takeoff] module. We have applied acute attention to detail, pushing our technology way beyond the expected operational limits to ensure high-performance levels, robustness and durability. In the coming months, we will complete the final assembly process on the quayside in Pembroke Dock before loadout to the operational site at East Pickard Bay, where the mWave technology will be validated in the open ocean, advancing it to TRL [technology readiness level] 7/8."
Bombora's mWave involves a series of air-inflated concave cells covered with rubber membranes and mounted into a steel foundation structure secured beneath the ocean’s surface. As waves pass overhead, air is squeezed out of each cell module in sequence, passing through one-way valves and into a duct system fitted with an axial turbine before being recirculated to refill each of the cell modules once the wave has passed. The unidirectional axial flow turbine is directly connected to a variable-speed generator to produce electricity.
The 900-tonne 1.5-MW mWave is 75 m long, 15 m wide and 6 m high. mWave cell modules can be configured to suit either fixed-bed nearshore foundation systems or floating offshore ocean environments.
"The Pembrokeshire Demonstration Project aims to provide a blueprint for future multi-megawatt wave energy projects,” Bombora Managing Director Sam Leighton said. “It will play a crucial role proving both the reliability and competitiveness of our novel mWave technology. Importantly, it will also deliver key optimization data to inform Bombora’s other world-leading initiatives including the InSPIRE Project, which is under development with global EPC contractor, TechnipFMC. This project aims to unlock the enormous potential of hybrid floating wind and wave arrays, which could play a significant role in the future energy transition—delivering a more consistent and stable clean energy supply by combining complementary power profiles."
07.19.2022
