Circuitry design for direct wind energy harvest system

Ting, Yung; Chang, Ching-Chun; Gunawan, Hariyanto

doi:10.1109/isie.2010.5637602

Cited by 2 publications

References 8 publications

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Analysis and design of roof turbine ventilator for wind energy harvest

Ting

Gunawan

Sugondo

et al. 2010

2010 2nd International Conference on Mechanical and Electronics Engineering

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Harvesting energy using roof turbine ventilator and electroactive material has been investigated to verify its performance. Since electric power gained from a single piece of regular size is usually small, auxiliary device to vibrate multiple pieces of electroactive materials in order to harvest more power is required. In this paper, an attempt of using the developed nozzle wind collector associated with the popular roof turbine ventilator employed with gear mechanism to impact and vibrate a group of electroactive material to generate electricity is proposed. Number of blade and blade angle of the roof turbine ventilator are influential to the effectiveness of wind collection. Also, number of electroactive material employed on the turbine ventilator under the wind speed in environment eventually determines the efficiency of wind harvest. A simple model is derived to estimate the minimum driving force from the wind power that needs to overcome the inertia of the turbine ventilator mechanism and the electromechanical energy conversion of electroactive materials. Wind drag force is calculated by using CFD is assumed to provide such driving force. Various combinations of the blade angle, number of blade and electroactive material actuators are investigated in simulations. Optimum design concerning the environment wind resource and configuration of turbine ventilator is discussed. According to several case studies, a few of design trends is addressed for better efficiency of energy harvest. Since multiple electroactive materials are employed, circuitry design with parallel input sources is implemented to sum up the current and integrate the power.

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Analysis and design of roof turbine ventilator for wind energy harvest

Ting

Gunawan

Sugondo

et al. 2010

2010 2nd International Conference on Mechanical and Electronics Engineering

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Fan-structure wind energy harvester using circular array of polyvinylidene fluoride cantilevers

Bai

Song

Dong

et al. 2016

Journal of Intelligent Material Systems and Structures

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A fan-structure piezoelectric energy harvester was proposed and tested in order to collect wind energy. Polyvinylidene fluoride was chosen due to its flexibility and longevity when compared to lead zirconate titanate. The impact-induced piezoelectric energy harvester consists of a stator and a rotor and a circular array of four cantilevers, utilize the rotor blades’ periodic impact on the free end of the cantilevers to generate oscillatory motion of cantilevers. A circular array of polyvinylidene fluoride cantilevers was fixed around the rotor in order to increase output power, save space at the same time. Static and transient characteristics of different cantilevers were investigated using finite element method and the result showed that polyvinylidene fluoride triangular cantilever performs the best in output voltage and power. Under the condition of optimal impedance and optimal overlap distance, a sum AC output power of four cantilevers without connection to each other approach to 0.75 mW was measured at the wind speed of 7 m/s when the blade number of rotor is 7 or 9. Two branches 0.27 mW DC output power was obtained when each two cantilevers in parallel connection in the case of full-wave rectification of each cantilever at the wind speed of 7 m/s.

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Circuitry design for direct wind energy harvest system

Cited by 2 publications

References 8 publications

Analysis and design of roof turbine ventilator for wind energy harvest

Analysis and design of roof turbine ventilator for wind energy harvest

Fan-structure wind energy harvester using circular array of polyvinylidene fluoride cantilevers

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