scholarly journals MODELLING OF THE ELECTRICITY GENERATION FROM LIVING PLANTS

2016 ◽  
Vol 78 (6) ◽  
Author(s):  
Choo Ying Ying ◽  
Jedol Dayou
Keyword(s):  
Energy Harvesting ◽  
Mass Loss ◽  
Energy Production ◽  
Aloe Vera ◽  
Load Resistance ◽  
Green Approach ◽  
Lower Load ◽  
Load Resistor ◽  
Energy Harvesting System ◽  
Harvesting Process

Electricity can be harvested from living plants by generating reaction between the plant and a pair of different metals. It has great potential in sustainable energy production because it offers a green approach to harvest energy from sources that are abundantly available. Previous investigation has shown that electrochemistry process is accountable for its mechanism of energy production. In this paper, the behavior of the ions flow in the electrodes-plant system is modelled and illustrated. For this purpose, energy harvesting system consists of Zn-Cu electrodes and aloe Vera was used where the electrodes were immersed in the aloe Vera leaf. It was hypothesized that during the energy harvesting process, oxidations of zinc atoms occur when an external load is connected between the two electrodes. For 72 hours of harvesting process, the zinc electrode experienced a mass loss of 3.2mg compared to electrochemistry prediction which is 0.0853mg when 1MΩ load was used. However, using a lower load resistor (1kΩ), the measured mass loss of the zinc increased to 6.7mg compared to the prediction which is 4.0452mg. This means that there is an increase of efficiency when a lower load resistance is used, which is 60.4% for 1kΩ, compared to 2.67% when using 1MΩ. This shows that the electrochemistry process is influenced by the load connected to the system. This finding improvises a better understanding on the energy production mechanism of the system.

scholarly journals Vision Analysis of the Influence of Piezoelectric Energy Harvesting on Vibration Damping of a Cantilever Beam

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7168
Author(s):  
Dariusz Grzybek ◽  
Andrzej Sioma
Keyword(s):  
Energy Harvesting ◽  
Cantilever Beam ◽  
Load Resistance ◽  
Vibration Damping ◽  
Laboratory Research ◽  
Passive Damping ◽  
Shunt Resistance ◽  
Piezoelectric Energy ◽  
Harvesting Process ◽  
The Given

A cantilever beam, manufactured from a steel-carrying substrate and two patches of Macro Fiber Composite of P2 type, was a subject of laboratory research. MFC patches were glued on both sides of the carrying substrate and were parallelly connected. An experimental determination of an optimal resistance for both energy harvesting and vibration passive damping of the cantilever beam was the purpose of the conducted laboratory research. The research contained 10 experiments in which courses of the energy-harvesting process and resistive passive damping of vibration were estimated. Energy harvesting was estimated by measurements of the generated current for the given load-resistance values. Resistive passive damping of vibration was assessed by using a vision method that enabled the displacements’ measurements of 10 selected points in the beam structure for the given shunt-resistance values. Values of both load resistance and shunt resistance were chosen on the basis of analytically calculated optimal load resistance and optimal shunt resistance. On the basis of the conducted experiments, the resistance range for which both the energy-harvesting process and the vibration-damping process are most effective was determined.

Optimization of a Rainbow Piezoelectric Energy Harvesting System for Tire Monitoring Applications

2018 ◽  
Author(s):  
Roja Esmaeeli ◽  
Haniph Aliniagerdroudbari ◽  
Ashkan Nazari ◽  
Seyed Reza Hashemi ◽  
Muapper Alhadri ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Piezoelectric Transducer ◽  
Load Resistance ◽  
Piezoelectric Transducers ◽  
Piezoelectric Energy Harvesting ◽  
Element Analysis ◽  
Multiphysics Modeling ◽  
Piezoelectric Energy ◽  
Monitoring Applications ◽  
Energy Harvesting System

Ambient energy harvesting using piezoelectric transducers is becoming popular to provide power for small microelectronics devices. The deflection of tires during rotation is an example of the source of energy for electric power generation. This generated power can be used to feed tire self-powering sensors for bicycles, cars, trucks, and airplanes. The aim of this study is to optimize the energy efficiency of a rainbow shape piezoelectric transducer mounted on the inner layer of a pneumatic tire for providing enough power for microelectronics devices required to monitor tires. For this aim a rainbow shape piezoelectric transducer is adjusted with the tire dimensions and excited based on the car speed and strain. The geometry and load resistance effects of the piezoelectric transducer is optimized using Multiphysics modeling and finite element analysis.

Design of an Energy Harvesting Rectenna for Low-Power Wireless Sensor

2014 ◽  
Vol 687-691 ◽  
pp. 3391-3394
Author(s):  
Lei Jun Xu ◽  
Chang Shuo Wang ◽  
Xue Bai
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Conversion Efficiency ◽  
Power Supply ◽  
Impedance Matching ◽  
Load Resistance ◽  
Input Power ◽  
Wireless Sensor ◽  
Measurement Results ◽  
Energy Harvesting System

This paper presents the design of a compact 2.45 GHz microstrip rectenna for wireless sensors’ power supply. In energy harvesting system, the ambient RF energy can be collected by the rectenna and converted to direct current, therefore, it can be applied to the power supply of low-power wireless sensor. Voltage doubling rectifier circuit and T-type microstrip impedance matching network are applied to this rectenna to increase the output voltage and the rectification efficiency. The antenna is fabricatied ​​by using double PCB board (FR4), and it is optimized by ADS to achieve the best performance. The measurement results show that the rectifier can reach the highest conversion efficiency of 78% when the load resistance is 320 Ω and the input power is 18 dBm. It also greatly improves rectenna’s conversion efficiency at lower input power when the input power is-20 dBm, which has great practical value for supplying low power consumption sensors.

scholarly journals Aloe Vera-Mediated Te Nanostructures: Highly Potent Antibacterial Agents and Moderated Anticancer Effects

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 514
Author(s):  
David Medina-Cruz ◽  
Ada Vernet-Crua ◽  
Ebrahim Mostafavi ◽  
María Ujué González ◽  
Lidia Martínez ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Aqueous Media ◽  
Aloe Vera ◽  
Multidrug Resistant ◽  
Dermal Fibroblasts ◽  
Anticancer Properties ◽  
Green Approach ◽  
Anticancer Effects ◽  
Synthesis Of Nanomaterials ◽  
By Products

Cancer and antimicrobial resistance to antibiotics are two of the most worrying healthcare concerns that humanity is facing nowadays. Some of the most promising solutions for these healthcare problems may come from nanomedicine. While the traditional synthesis of nanomaterials is often accompanied by drawbacks such as high cost or the production of toxic by-products, green nanotechnology has been presented as a suitable solution to overcome such challenges. In this work, an approach for the synthesis of tellurium (Te) nanostructures in aqueous media has been developed using aloe vera (AV) extracts as a unique reducing and capping agent. Te-based nanoparticles (AV-TeNPs), with sizes between 20 and 60 nm, were characterized in terms of physicochemical properties and tested for potential biomedical applications. A significant decay in bacterial growth after 24 h was achieved for both Methicillin-resistant Staphylococcus aureus and multidrug-resistant Escherichia coli at a relative low concentration of 5 µg/mL, while there was no cytotoxicity towards human dermal fibroblasts after 3 days of treatment. AV-TeNPs also showed anticancer properties up to 72 h within a range of concentrations between 5 and 100 µg/mL. Consequently, here, we present a novel and green approach to produce Te-based nanostructures with potential biomedical applications, especially for antibacterial and anticancer applications.

Environment and Application Testbed for Low-Power Energy Harvesting System Design

2020 ◽  
pp. 1-1
Author(s):  
Lukas Sigrist ◽  
Andres Gomez ◽  
Matthias Leubin ◽  
Jan Beutel ◽  
Lothar Thiele
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
System Design ◽  
Energy Harvesting System
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