Mechatronics-enabled harvesting of polarized wind kinetic energy through novel bio-mimetic swaying devices

Abstract

One of the most severe problems of the world is represented by climate change and its relevant negative consequences on the environment. To tackle future environmental changes, it is imperative to modify current technologies of energy generation, since traditional generation techniques, such as coal-burning and the combustion of gases and petroleum derivatives, have detrimental effects on the environment. In this research study, a bio-mimetic system for polarized wind energy harvesting was designed and manufactured, suitable to be installed besides roads and streets to exploit both the wind flow generated by traffic and the natural wind flow. Through an essential kinematic that is devoid of any auxiliary system and that exploits the electromagnetic induction principle, authors aimed at obtaining higher efficiencies with respect to the very low values that characterize rotary turbines. The final product was supposed to resemble a leaf swaying under the action of the wind flow. It is referred to as Smart Leaf. Here, four Leaves are connected in parallel, forming a Four-Leaf Smart Bush. A mathematical model of the Leaf swaying dynamic and of the electromagnetic induction principle is illustrated. The Smart Bush performances are assessed through experimental tests, both at an Eolic generator and on field. The Eolic generator is exploited to reproduce the principal wind profiles due to traffic and to natural air motion in order to identify the most appropriate urban and sub-urban contexts as installation sites for the Smart Bush. Based on the experimental results, an efficiency much lower than rotary axial devices has been estimated. Finally, a technology demonstrator is assembled to monitor air pollution by means of sensors powered by the Smart Bush. When the accumulated electric energy is enough, the software detects air composition and shoes the results on a dedicated display. Future developments will mainly regard the development and implementation of a voltage amplifier circuit and the design of a more refined electronics in general.