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INNOVATION FEATURE


FEATURE...


New microgeneration standards also set technical challenges to address from the early stages of design and R&D and all along the supply chain to the customers. nheolis has adapted its technology to the local requirements and now proposes two innovative models with significant promise for the wind industry: The nheowind 3D 100 (3.5 KW nominal output) and the nheowind 3D 50 (1.5 KW nominal output). Incorporated four years ago by Nordine HADDJERI and advised by Marc LASSUS (founder and former CEO of GEMPLUS), nheolis has spent more than three years of research and development, including tests in CNRS (French National Centre for Scientific Research) wind tunnels to introduce the world-first 3D blades design, used on the nheowind 3D 100 CP.


This breakthrough innovation relies on the Bernoulli principle: using fluid dynamics applied to small wind, the cone effect takes advantages of the pressure rise on one side and the depression on the other, as well as the trajectory of the wind.


nheolis further improved the blade design in partnership with ONERA, the French Aerospace Lab. Modelling wind trajectory led the R&D team to the curved patented design of the 3D blades "Chistera", introduced in 2010 with the nheowind 3D 50 and 3D 100. This curved shape retrieves relative wind in its trajectory and increases rotational speeds.


The company owns three international patents, two of them being directly exploited on the blade design. nheolis technology has a significant contribution to improve wind turbine integration, leading to sound emissions inferior to 35 dB at a 12 meter tower base, at the nominal wind speed of 12 m/s. The unique design avoids wind shear and ensures that, regardless of operating speed, the sound emission of the turbine remains inferior to the noise generated by the wind itself. Further to sound emissions, the nheowind delivers a larger production than conventional designs, generating power from 2.5 m/s up to 36 m/s (80.5 mph). This large wind speed range would facilitate wind turbine installations all over the country. A reinforced structure using specific components was tested to withstand powerful gusts and turbulences through the rigging of the blades. The turbines have resisted the storms Klaus and Xynthia in 2009 and 2010 in France.


In France, nheolis customers include the restaurant network Courtepaille that takes advantages of the low sound emission and the facilitated design integration. The products are perfectly suited for both on-grid and off-grid usage and existing customers include individuals, private companies and government agencies, in France and abroad.


Today exploited in small wind, this design could represent new opportunities for the conception of larger scale turbines and facilitate both noise and landscape integration.


Settling its activities in the UK, nheolis will establish new partnerships with installers and tower suppliers in the UK. Member of Renewable UK, the manufacturer aims at bringing its contribution to the development of a small wind market in the UK and abroad.


Sarah Meltcheff Nheolis Ltd www.nheolis.com


Wind Energy NETWORK


09


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