Vertical axis wind turbine with pultruded blades

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

1993-07-12

1994-12-27

Cuda, Irene

Metal working

Method of mechanical manufacture

Impeller making

2988971, 416196A, B23P 1500

Patent

active

053753240

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: 4162410 (1979-07-01), Amick
patent: 4293279 (1981-10-01), Bolie
"G-Mill" by Goldsworth Wind Energy Systems, Torrance, Calif.
"UTRC 15 kW Wind-System Development, Phase II-Fabrication and Testing, Feb. 1982" prepared by United Technologies Research Center, East Hartford, Conn. 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, Conn. 06108.
"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 VAWTs" by D. J. Malcolm, Lavalin Engineers Inc., Toronoto; International VAWT Technology Workshop, Pleasanton, Calif.; 11 Apr. 1991.
"Dynamically Soft Darrieus Rotors"]by D. J. Malcolm, R. Lynette & Associates Inc., Redmond, Wash.
"Pultrex P8000M 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.

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