During a 39-day test period, over tides, Verdant Power’s turbines performed with over 99% availability and generated 187 kW at 2.5 m/s peak flood tide velocity, according to an independent power performance assessment by the European Marine Energy Centre (EMEC).
EMEC completed the assessment for Verdant Power’s New York tidal power array at the Roosevelt Island Tidal Energy (RITE) site. Overall water-to-wire efficiencies reached over 46%.
This is the world’s first marine energy Renewable Energy Test Report (RETR) and follows EMEC becoming the world’s first International Electrotechnical Commission (IEC) Renewable Energy Testing Laboratory (RETL) in August 2020. It is also the first United Kingdom Accreditation Service (UKAS) ISO/IEC 17025 accredited power performance assessment to be completed by EMEC at a site outside its own test facilities in Orkney, Scotland.
EMEC followed IEC technical specification ‘62600-200: Electricity producing tidal energy converters — power performance assessment’. EMEC reviewed all test and data collection equipment as well as overseeing the deployment of current profilers to measure water speeds. The electrical power output of each turbine was measured and analyzed to develop power and efficiency curves for the turbines.
The data was processed and quality controlled by EMEC using the company’s Integrated Metocean Processing, Analysis and Quality Control Tool (IMPAQCT) and the performance was analyzed using EMEC’s Tidal Power Performance Tool (TPPT). COVID-19 restrictions required the extensive use of computer and video security measures.
“The performance assessment and RETR characterize the energy production from the tidal energy converters across the range of water velocities at the RITE site,” said Jonathan Lindsay, EMEC Operations and Technology Director. “The reports ensure that project installations adhere to IEC wave and tidal energy international standards, supporting Verdant’s technical development pathway, and provide third-party assurances to financiers and investors in the sector.”
Dean Corren, Verdant Power chief technology officer, said: “The high level of performance and reliability demonstrated by the Gen5d tidal energy system over this long-term deployment meets the requirements for commercial operations, and as the first project with formal third-party confirmation under IEC conformity, we look forward to accelerating development for Verdant Power and the marine renewables industry.”