Technology Advancement

The fundamental technology development of Verdant Power’s Free Flow System has focused on concurrent advancements in the following four areas around and bearing on the company’s projects and work in partnership with government, NGO, and other research partners:

  • Technology Advancement

  • Manufacturing and Levelized Cost of Energy (LCOE) Reduction

  • Environmental Compatibility

  • Regulatory Acceptance

Key milestones achieved during this technology development period are as follows:

  • Advancing the Free Flow System through five generations of RD&D, taking the technology to the current 5th generation (Gen5) 

  • Undertaking first-of-a-kind regulatory and environmental compatibility efforts, achieving acceptability of the Free Flow System design in marine environments and resulting in the first commercial license for tidal power in the United States

  • Progression of US-based manufacturing and supply chain efforts focused on logical reductions in product costs and LCOE

Generation 5 Free Flow System
Development of the 5th Generation (Gen5) Free Flow System is advancing based on prior generation operations. The Gen5 system represents a commercially economical design for reliability, resilience, and environmental compatibility.  The design cycle has focused on minimizing maintenance requirements by maximizing service intervals and achieving economic volume manufacturing and assembly.

Advancement of Gen5 Turbine Rotor Blades

Verdant Power completed a project supported by the US DOE to design and test the larger, higher-power Gen5 composite turbine rotor.  In addition to the DOE, the effort was conducted in partnership with the National Renewable Energy Laboratory, Sandia National Laboratories,  and the University of Minnesota's St. Anthony Falls Laboratory and used evolving turbine modeling techniques along with computational fluid dynamics and finite element analysis to design, assess, and optimize the new rotor.  The composite blades were also designed for cost-effective volume production. 

The effort culminated in the successful full-scale (5m diameter) in-water dynamometry and loads testing of the full Gen5 turbine rotor assembly at Verdant Power's RITE Project site.  This updated rotor design is planned for use on Gen5 turbines to be installed at the RITE Project and future commercial installations, including at larger scales.

TriFrame Advancement and IO&M Cost Reductions

Key to the commercialization of a marine energy technology is to make significant reductions to the costs of system installation, operations & maintenance (IO&M). Towards this end, Verdant Power is in the final phases of a three-phase project with support from the US Department of Energy (DOE) and the New York State Energy Research & Development Authority (NYSERDA) that will conduct an integrated design process to develop, operate, and execute a cost-effective maintenance cycle at full-scale in open water, on a TriFrame™ equipped with three Gen5 turbines at the RITE Project site.  Installation of the Gen5 system on the TriFrame™ mount is planned for Fall 2020.  Learn More >

TriFrame™ with Gen5 Turbines

Planned for Installation at RITE (2020)

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Key design enhancements to the Gen5 turbine include the following:

  • Composite (fiber-reinforced plastic) blades

  • Ductile iron hub casting

  • Casting for pylon/nacelle connection

  • Integrated gearbox unit incorporating shaft housing/bearings/seals

  • Redundant dynamic (shaft) and static sealing to retain lubricant and exclude seawater

  • Novel long service life main shaft seal arrangement

  • Failsafe brake

  • Non-toxic fouling-release coating system

  • Improved commercial quality control and assurance manufacturing process

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Company Progresses toward Autumn 2020 Installation of Gen5 Free Flow System at RITE

Verdant Power has successfully taken additional steps toward the installation of three Gen5 Free Flow System turbines on a TriFrame™ mount at the RITE Project site in New York City’s East River. The turbines were transported from the Company’s New Jersey marine engineering support services facility, where the turbines were assembled, to a marine vessel installation services area, where they have been integrated onto a Verdant Power TriFrame™ mount in preparation for on-water delivery and deployment at the RITE Project site.  In addition, the RITE Project Control Room on Roosevelt Island is being readied for the turbine system installation, which is planned for autumn 2020.  More >

EMEC to Assess Free Flow System Performance

The European Marine Energy Centre (EMEC) will provide an independent performance assessment of Verdant Power’s 5th Generation (Gen5) Free Flow System to be deployed at the RITE Project in 2020.  By independently measuring the system's performance, EMEC will add credibility to operational results and set a new standard for tidal energy technology developers to meet globally.  More >

Verdant Power Secures $6 Million Funding for Final System Demonstration at RITE Project

Verdant Power has received $6 million in funding for the next phase of its program to advance the development of the Company’s tidal power system and TriFrame mount at its RITE Project in New York City's East River.  The U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy (EERE) has approved $3M in co-funding support for the third phase of Verdant Power’s project that will qualify its tidal power system through to final test, demonstration and commercialization.  More >

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