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The design of high-speed windmills suitable for driving electric generators

Technical Report:

Abstract

A simple windmill theory is presented for designing a small, horizontal axis windmill for powering an automobile-type generator used along with a storage battery. Windmills designed by the method presented in this paper have maximum efficiencies in the order of 0.40 to 0.45, which approaches 75% of the theoretical maximum. Wind tunnel tests were performed on a two-bladed unit designed for a tip speed/wind speed ratio of 7. Maximum efficiency was close to 0.45 at a tip speed/wind speed ratio of slightly over 6. This windmill, if fitted directly to a specially wound three-brush automobile type generator, wil begin to charge a 6-volt battery at a wind speed of 7.5-8 mph. 2 refs., 7 figs., 1 tab.
Authors:
Publication Date:
Jan 01, 1975
Product Type:
Technical Report
Report Number:
NAE-LTR-LA-183; CE-02235
Reference Number:
CANM-89-000234; EDB-89-025278
Subject:
17 WIND ENERGY; HORIZONTAL AXIS TURBINES; DESIGN; AERODYNAMICS; ENERGY EFFICIENCY; PERFORMANCE TESTING; TURBINE BLADES; WIND TUNNELS; EFFICIENCY; FLUID MECHANICS; MACHINERY; MECHANICS; TESTING; TUNNELS; TURBINES; TURBOMACHINERY; UNDERGROUND FACILITIES; WIND TURBINES; 170602* - Wind Energy Engineering- Turbine Design & Operation
OSTI ID:
6628290
Research Organizations:
National Aeronautical Establishment, Ottawa, Ontario (Canada)
Country of Origin:
Canada
Language:
English
Availability:
CANMET/TID, Energy, Mines and Resources Canada, 555 Booth St., Ottawa, Ont., Canada K1A 0G1; $0.34CAN per page, $3.40 CAN minimum.
Submitting Site:
CANM
Size:
Pages: 18
Announcement Date:

Technical Report:

Citation Formats

Klein, G J. The design of high-speed windmills suitable for driving electric generators. Canada: N. p., 1975. Web.
Klein, G J. The design of high-speed windmills suitable for driving electric generators. Canada.
Klein, G J. 1975. "The design of high-speed windmills suitable for driving electric generators." Canada.
@misc{etde_6628290,
title = {The design of high-speed windmills suitable for driving electric generators}
author = {Klein, G J}
abstractNote = {A simple windmill theory is presented for designing a small, horizontal axis windmill for powering an automobile-type generator used along with a storage battery. Windmills designed by the method presented in this paper have maximum efficiencies in the order of 0.40 to 0.45, which approaches 75% of the theoretical maximum. Wind tunnel tests were performed on a two-bladed unit designed for a tip speed/wind speed ratio of 7. Maximum efficiency was close to 0.45 at a tip speed/wind speed ratio of slightly over 6. This windmill, if fitted directly to a specially wound three-brush automobile type generator, wil begin to charge a 6-volt battery at a wind speed of 7.5-8 mph. 2 refs., 7 figs., 1 tab.}
place = {Canada}
year = {1975}
month = {Jan}
}