Author: David Malcolm and Olamide Ajala-InyangPublication: Journal of PhysicsYear Published: 2024 Abstract. This paper describes a project for predicting and measuring the structural response of a 70 kW vertical axis wind turbine (VAWT), while offering insights for optimizing efficiency and ensuring longevity. We employ the traditional frequency response approach and model the turbine behavior using…
Author: Dr. David MalcolmPublication: Wind Harvest InternationalYear Published: 2023 This report brings together much of the structural and performance data from the operation of the Wind Harvester 3.1. The response at three of the sensors is examined in detail (the lower mast bending, lower mast torque, the bending in the middle of the upper blade,…
Author: Kevin WolfPublication: Wind Harvest InternationalYear Published: 2015 The most significant changes incorporated into the Wind Harvester 3.0 were cantilevering the basic H-type rotor, dramatically lowering its solidity, and moving from induction generation to power converters. The work produced by Wind Harvest European engineers Charliaos (Haris) Kotsarinis (aerodynamic modeling), Ionut Munteanu (cantilevered mechanical engineering), and Pablo Paz…
Author: Kevin WolfPublication: North American Clean EnergyYear Published: 2021 What do you think of when you hear the wind blow? Or see clouds flying across the sky? If you ask most people about capturing the power of wind, they picture a towering wind turbine. In fact, the clean energy industry may be missing out on…
Author: Kevin WolfPublication: Wind Harvest InternationalYear Published: 1984 Wind Harvest Company’s Windstar 480-4 took the previous iteration, the Windstar 256 model, beefed it up, and increased its size by adding a third module and increased blade length from 8 to 10 feet and thus rotor height from 16 to 30 ft. This model also featured…
Author: Kevin WolfPublication: Wind Harvest InternationalYear Published: 1976 Bob Thomas’ first Vertical Axis Wind Turbine (VAWT) was a proof of concept model built in 1976. He built it with modest funds and observed it operating in low winds. The test turbine was mounted on a small trailer and pulled out of a hangar at the…
Author: Kevin WolfPublication: Wind Harvest InternationalYear Published: 1979 Wind Harvest Company’s Windstar 256 was a larger model than its predecessor with two stacked “modules” of blades attached to a central rotor mast. These changes were based on what was learned from the previous “Camarillo Model,” built in 1976. The prototype was mounted on a cement…
Author: Kevin WolfPublication: Wind Harvest InternationalYear Published: 1984 Wind Harvest Company’s Windstar 480-4 took the previous iteration, the Windstar 256 model, beefed it up, and increased its size by adding a third module and increased blade length from 8 to 10 feet and thus rotor height from 16 to 30 ft. This model also featured…
Author: Kevin WolfPublication: Wind Harvest InternationalYear Published: 1994 The model 530 was designed for Chinese manufacturing, first starting with a prototype.
Author: Kevin WolfPublication: Wind Harvest InternationalYear Published: 1994 The Model 1066 was designed to be built in Harbin, China. However, the first prototype was made in Los Angeles with an all-Chinese crew from Harbin. The turbine consisted of the following features: Single module, larger than the multi-module Model 530. Blades 3 times longer than the…