Vertical axis wind turbine with pultruded blades

Details Vertical axis wind turbine with pultruded blades Vertical axis wind turbine with pultruded blades

1994-09-29

1996-03-19

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Laminated, embedded member or encased material

416225, 416233, F04D 2938

Patent

active

054999049

ABSTRACT:
A pultruded composite blade for a Darrieus-type vertical axis wind turbine is disclosed, along with a method for fabricating such a blade. The blade is a composite structure with a uniform cross-section with reinforcing fibers at least some of which extend parallel to a lengthwise central axis and run continuously from end to end. The composite blade is pultruded straight and, when installed on the tower, the blade is elastically bent into a curved shape that approximates a troposkein. The composite structure includes a skin composed of multiple layers of resin-coated glass fabric that define an airfoil shape. The composite structure also includes one or more internal ribs or spars composed of multiple layers of resin-coated glass fabric.

REFERENCES:
patent: 1835018 (1931-12-01), Darrieus
patent: 4111606 (1978-09-01), Prewo
patent: 4162410 (1979-07-01), Amick
patent: 4293279 (1981-10-01), Bolie
patent: 4381960 (1983-05-01), Pinter et al.
patent: 4449053 (1984-05-01), Kutcher
patent: 4525911 (1985-07-01), Sisson et al.
patent: 4915590 (1990-04-01), Eckland et al.
patent: 5308228 (1994-05-01), Benoit et al.
patent: 5375324 (1994-12-01), Wallace et al.
"Mankind's Future Source of Energy" by Gupta and Chandra, R & D Unit, BHEL, Hyderabad, India.
"Proceedings of the Vertical Axis Wind Turbine (VAWT) Design Technology Seminar For Industry" Apr. 1-3, 1980; Albuquerque, New Mexico; Sandia National Laboratories Energy Report, p. 50.
"Design Approaches For Future WAWTs" by D. J. Malcolm, Lavalin Engineers Inc., Toronto; International VAWT Technology Workshop, Pleasanton, CA; 11 Apr. 1991.
"Dynamically Soft Darrieus Rotors" by D. J. Malcolm, R. Lynette & Associates Inc., Redmond, Washington.
"Pultrex P800M Pultrusion Machine" & Pultrex P4000M Pultrusion Machine.
"Productive Systems For Profitable Pultrusion" from Pultrusion Technology, Incorporated.
"CPE Pultrusion Machines", CPE Composite Process Equipment Inc.
"Advanced Wind Energy Technology", ADECON.
"G-Mill" by Goldsworth Wind Energy Systems, Torrance, CA.
"UTRC 15 kw Wind-System Development, Phase II--Fabrication and Testing, Feb. 1982" prepared by United Technologies Research Center, East Hartford, CT 06108.
"UTRC 15-kw Wind-System Development, Phase I--Design and Analysis, Vol. II--Technical Report, Dec. 1981" prepared by United Technologies Research Center, East Hartford, CT 06108.

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