COMPARATIVE EVALUATION OF ENERGY HARVESTING TECHNIQUES FOR SUSTAINABLE ENERGY IN LOW POWER APPLICATIONS
Publication Date : 30/10/2022
Basically, in the field of electronic engineering, small amount of energy is needed to power electronic devices and so batteries have been the conventional source of energy for most electronic devices. These include devices for mobile communication, real time data acquisition, embedded and remote monitoring system applications. Nevertheless, batteries have issues of limited capacity, access to power supply sources for recharging, battery lifetime and replacement among other issues. In essence, with technological advancement in the fields of embedded systems; Ad-Hoc Sensor Networks such as mobile Ad Hoc Networks (MANETs), wireless sensor networks (WSN), Vehicular Ad Hoc Networks (VANETs) and low power electronics such as MEMS and NEMS, have necessitated the need to explore sustainable and ubiquitous forms of energy as an alternative to the conventional battery. There is therefore need for electronic systems to have high energy retention capacity, self energy generating ability and sustainable source of energy for sustained operation. This feat can be achieved by exploring and tapping ambient energy sources such as thermal, light, RF and mechanical energies available in the environment. The process of extracting and transforming energy from the environment into useful electric energy is called energy harvesting (EH) or Energy Scavenging. This paper presents a survey of various energy harvesting techniques and the observable and available promising opportunities offered. It also explored the various sources of energy harvesting available in the ambience, unfolds the corresponding transducers for ambient energy transformation, reveals several transduction techniques and identifies issues and challenges of energy harvesting. The application areas of harvested energy and desirable properties of energy harvesting and application circuits were also enumerated for informed decision making and application to current trends in energy harvesting.
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