Abstract- 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
Abstract- Harvesting energy using roof turbine ventilator and electroactive material has been investigated to verify itsperformance. Since electric power gained from a single piece of regular size is usually small, auxiliary device to vibratemultiple 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 toimpact and vibrate a group of electroactive material to generate electricity is proposed. Number of blade and bladeangle of the roof turbine ventilator are influential to the effectiveness of wind collection. Also, number of electroactivematerial employed on the turbine ventilator under the wind speed in environment eventually determines the efficiency ofwind harvest. A simple model is derived to estimate the minimum driving force from the wind power that needs toovercome the inertia of the turbine ventilator mechanism and the electromechanical energy conversion of electroactivematerials. Wind drag force is calculated by using CFD is assumed to provide such driving force. Various combinationsof the blade angle, number of blade and electroactive material actuators are investigated in simulations. Optimum designconcerning the environment wind resource and configuration of turbine ventilator is discussed. According to several casestudies, 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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