McDonnell 40-kW Giromill wind system: Phase I - design and analysis. Volume II. Technical report

TL;DRAbstract

The objective of Phase I of this contract was to determine a preferred configuration for the 40 kW Giromill and to design that configuration. The Giromill is a vertical axis windmill with a series of articulated vertical blades whose angles are controlled to maintain a constant RPM (when wind speed is sufficient). A microprocesor is used to process information on wind speed, wind direction, and RPM and establish blade position. The Prototype Giromill, when connected to a utility grid, is designed to supply 40 kW in a 20 MPH wind. By means of a kit, it can be converted to a stand-alone machine having a mechanical output. A 30-year life was a design objective. The Giromill is designed to withstand a peak gust of 125 MPH with a 1.5 safety factor. Phase I consisted first of a four-month period of trade studies during which a number of variatons in the design were studied. Out of these studies evolved the configuration which became the basis for a six-month design period, which began during

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