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