Disign and Implementation of Solar wind Hybrid Engener System for maximizing lifspon of field Deployed wirless sensor Network (WSN)
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Date
2017-02
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Addis Ababa University
Abstract
A Wireless Sensor Network (WSN) is composed of a large number of sensor nodes that are densely deployed either inside a phenomenon or very close to it. The main challenge for the researchers in the field of WSNs is maintaining network lifespan until the mission of the network is completed. This challenge is coming from the nodes limited energy source of fixed amount capable primary battery which has no option to maintain its energy by recharging. And also changing it with another battery is impossible if the field that the network located is inaccessible.
This thesis addresses this challenge with the design and implementation of harvested energy source for the sensor node’s rechargeable battery from the hybrid power sources of solar irradiance and wind speed. In addition, energy management system is designed for managing the on/off states of sensor nodes due to uncontrollable property of the power source used here. And also, energy efficient LEACH algorithm is incorporated for assisting the sensor nodes to use the charged energy efficiently. Besides this, simulation experiment is done to show what can be the behavior of remaining energy in case of supplying sensor nodes from fixed amount capable primary battery and from the harvested energy stored in rechargeable battery and supper capacitor. This experiment is made on three IDEs known as Omnet++, Castalia and greenCastalia by integrating them together. At the end quantitative and qualitative analysis of obtained results is done.
From the result analysis one can observe the network lifespan is prolonged when harvested energy is used together with the management system for uncontrolled behavior of the sources (solar and wind) rather than fixed capable battery. Hence, for field deployed WSNs, utilizing naturally existed abundant energy sources like solar and wind have promising solutions for the challenged network lifespan without exerting any negative impact for the environment at which they are deployed. The simulation result also confirms this by generating 98 and 96% residual energy for rechargeable battery and supper capacitor respectively over that of 86% for fixed capable battery after 5000seconds of operation time completed.
Keywords: Energy Harvesting, Wireless Sensor Network, Lifespan, Remaining Energy, Solar-Wind Hybrid Power Source, Rechargeable Battery, Power Efficient Routing Algorithm.
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Keywords
Energy Harvesting, Wireless Sensor Network, Lifespan, Remaining Energy, Solar-Wind Hybrid Power Source, Rechargeable Battery, Power Efficient Routing Algorithm