HANNA

   Wave & Tidal Energy Primary Drives

  

CLEAN ENERGY FOR FUTURE GENERATIONS

Turbine PTO, Direct Drive PTO & Closed-Loop PTO 

     

  Inventor, John Clark Hanna, introduces two wave energy converters for utility-grade power:  (1) the Hanna Turbine known as a WETGEN (Wave Energy Turbine GENerator), U.S. Patent No. 8,358,026 and (2) the Hanna MultiDrive, a mechanical, direct-drive power take-off (PTO), U.S. Patent No. 8,745,981.

 

  Both devices harvest energy from ocean waves by means of the OWC (Oscillating Water Column) principle.  OWC technologies are the most mature and well-studied wave conversion systems in the industry.  Oregon State University (OSU) built a small working Hanna Turbine.  The device was tested with a bi-directional air flow.  Acting as an impartial third-party, the OSU College of Engineering issued a final report that validated the Hanna Turbine in 2014.

 

  The simple and robust Hanna Turbine was designed to improve upon the pioneering Wells Turbine.  In contrast to the thirty year old Wells design, the transformative Hanna Turbine uses asymmetrical airfoils with a lower angle of attack.  This creates more lift and less drag.  The design resists "stall", improves self-starting and can function over a wider bandwidth with higher torque values.  It offers lower damping (restriction) to the bi-directional airstream.  Unlike the Wells, it drives two generators - doubling the power output.  Both generators are easily accessable and operate in a dry environment.  The Hanna Turbine is versatile, offering three distinct power take-off designs to meet job-specific applications. 

 

   The turbine and direct-drive devices operate at sea or on shore.  They can be built into existing or purpose-built jetties or breakwaters and can be easily connected to the grid.  All completed EIR studies for existing shore based OWC installations have resulted in FONSI (Findings of no Significant Impact).  Hanna shore based power plants will not interfere with marine life, maritime traffic, commercial fishing or recreational activities.  The buoys can be easily serviced through weather-tight hatches.  No generating components are immersed in water. 

 

  To underscore the remarkable versatility of the WETGEN design, the turbine can be easily modified for use as a tidal energy converter.  Whether applied for wave energy or tidal energy, no other turbine in the global marketplace can serve both of these renewable energy sectors.

 

  To provide reliable power for littoral and deep water research and data acquisition buoys, Hanna has developed a novel closed-loop pneumatic drive for bi-directional air flows.  For details, click HERE.

   

   Videos of the Hanna Turbine can be viewed on the WETGEN You Tube channel.  For a more detailed description of the Hanna MultiDrive power take-off, click HERE . 

 

  To assure the responsible development and successful commercialization of all Hanna technologies, the inventor seeks to engage with potential equity partners and long-term investors.

 

For more details on the Hanna Turbine and to read an in-depth Technical Report, click HERE.


 

Test stand and early experimental Hanna Turbines

 

                           UPDATE

  As of October, 2017, two Master's Dissertations of the Hanna Turbine have been completed.  The studies were undertaken at prestigious international universities.  The favorable results of both studies have advanced the turbine's Technology Readiness Level to TRL 4.  Please go  to Page 2 to read both Technical Reports.

 

  Still active is a call for an MSc or PhD-level candidate to pursue a dissertation on either the Hanna direct-drive PTO or the tidal energy PTO. Please respond to this call if you would like to conduct an original study of either of these primary drives.

wetgen@gmail.com

HANNA PRIMARY DRIVES

 

FUELED BY THE SEA