© 2018 JETIR August 2018, Volume 5, Issue 8 www.jetir.org (ISSN-2349-5162) JETIR1808145 Journal of Emerging Technologies and Innovative Research (JETIR) www.jetir.org 974 Comparison of Green Energy harvested using PZT piezo patch in different series configuration and Optimization of circuitry system Dinesh Yadav* *M.Tech Scholar, Department of Mechanical Engineering, University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak, Haryana, India. ABSTRACT: In this paper, a comparison of harvested energy using PZT with hydraulic dynamism has been done considering different factors. The flowing water has been directed towards the PZT patch through nozzle. Output measured in terms of voltage and current according to different values of the distances of nozzle from PZT, different nozzle angle and number of PZT patch (one and two). It has been observed that the maximum output voltage is generated with double patch connected in series. Keywords: Piezoelectric, vibration, Energy harvesting, Piezoelectric Circuit, Piezo patch 1. INTRODUCTION Over the period of time, as most of the people are using electronic devices, so there is a huge demand of energy. Today, in most of the application we are using electrochemical batteries, which have limited lifetime. There is a need of self-powered devices in various medical and defense areas. Energy harvesting is the process of converting available ambient energy into usable energy. Scientist and researcher are working on the techniques of energy harvesting. Energy can be harvested using different sources like solar energy harvesting, wind energy harvesting, thermal energy harvesting, hydraulic energy harvesting, vibrational energy harvesting. Energy harvesting system for wind, solar, hydraulic and thermal sources produce huge amount of energy of kW or MW level and call macro level energy harvesting system. In vibrational energy harvesting system, power generated is of low level and these are known as micro level energy harvesting system. A lot of research is going on in the field of vibration energy harvesting, Dinesh et al (2018). In vibrational energy harvesting, we can use capacitive, electromagnetic and piezoelectric transducer to convert mechanical vibration into electric energy. There is a no of sources available for vibration energy harvesting system, some of them are – common vehicle, industrial machines, wings of aero plane, small household devices, speakers, human body during the walk, heartbeat. The amount of energy harvested from these sources can be used further to give power to small devices. In piezoelectric energy harvesting, we use a piezoelectric material which produces energy by applying mechanical vibrations and vice versa. Static force does not produce vibrations, so for vibration energy harvesting, we need dynamic force. In the past few years, a lot of significant work has been done by various researchers in the field of piezoelectric energy harvesting. For example, at MIT media lab (1996) it was investigated that energy can be harvested from various human activities and Shenck N S (2001) confirmed that energy generated by walking can be collected, with the help of the piezoelectric element. Elvin et al (2001, 2003) and Ng and Liao (2005) used piezoelectric elements for power generation and sensor. Mateu L and Moll F (2005) used the cantilever system to harvest energy. Kim et al (2005) and Ericka et al (2005) make a thin piezoelectric plate to harvest energy. Allen et al (2001) and Taylor et al (2001) used long strips of piezoelectric polymers in the river and ocean water flow to harvest energy. Jeon et al (2005) have made PZT MEMS. Chhabra et al (2011, 2014, 2016) worked on design, analysis of piezoelectric element and optimal placement of piezo actuators on plate structure for active vibration control. Richards et al (2004) gives an analytical formula to predict power conversion efficiency of the piezoelectric element. In this paper, a model is presented for analysis of output generated considering various factors like distance of nozzle, angle of nozzle, number of PZT patch, number of nozzle to create vibration, two types of circuit (classic and voltage doubler). 1.1. Description of the model: The proposed mechanical model is composed of a water tank, a set of nozzle to increase the velocity of fluid, pipe to circulate the water flow, PZT patches mounted on a plate and voltage doubler circuit to generate output terminal voltage. The model can be used where the water supply is continuous such as river, lakes, bridges, waterfall, etc. In case, if water is present in limited quantity then a reservoir tank can be used to store the water and a pump can be used to recirculate the water. (a) (b) Figure 1(a, b): Schematic diagram and Experimental set-up of the apparatus