scholarly journals A review study on energy harvesting systems for vehicles

2018 ◽  
Vol 12 (4) ◽  
pp. 251-259 ◽  
Author(s):  
Umut Aksu ◽  
Recep Halicioglu
Keyword(s):  
Energy Source ◽  
Energy Harvesting ◽  
Fossil Fuels ◽  
Fuel Oil ◽  
Automotive Sector ◽  
Slowing Down ◽  
Industrial Sectors ◽  
Harvesting Systems ◽  
Technological Developments ◽  
Waste Energy

The widespread and increasing consumption of fossil-based fuels as an energy source causes a rapid decrease of these natural sources, as well as an increase of pollution in the atmosphere. Fuel oil, one of the products of fossil fuels, is today the commonly used energy source for transportation. The importance of contributing to the fuel economy and of increasing environmental consciousness have necessitated certain measures in the automotive sector, as well as in other industrial sectors. Therefore, the technological developments recently carried out in the automotive sector aim to reduce the consumption of fossil fuels, for example by recovering waste energy in vehicles. In this direction, efforts have been centered upon the development of energy harvesting systems that provide energy recovery from dynamic parts of the vehicles, such as suspensions. Moreover, the regenerative braking systems that recover some amount of kinetic energy of the vehicles slowing down have been developed and have been in use long since. In this study, research studies on providing the recovery of the vehicles’ waste energy are reviewed with their comparisons.

Conceptual Design of an Energy Harvesting Accessory for Road Vehicles

2016 ◽  
Author(s):  
Gerardo Hurtado Hurtado ◽  
José Antonio Romero Navarrete
Keyword(s):  
Energy Source ◽  
Energy Harvesting ◽  
Conceptual Design ◽  
Alternative Energy ◽  
Fossil Fuels ◽  
Residual Energy ◽  
Road Vehicles ◽  
The Road ◽  
Alternative Energy Source ◽  
Electromagnetic Generator

The use of transportation residual energy can represent an alternative energy source to reduce the consumption of fossil fuels. In specific economic environments, in which the road conditions are not good, the vibration of the vehicles’ masses, represent a potential enormous source for such alternative energy source. In this paper, the conceptual design of an energy-harvesting accessory to be installed in existing suspensions of vehicles, is presented. The principles of operation include an electromagnetic generator, a rectifier and a battery. Validation of the proposed accessory is made through simulation that indicates the feasibility of this device.

Oil in the age of steam

2010 ◽  
Vol 5 (1) ◽  
pp. 75-94 ◽  
Author(s):  
Nuno Luís Madureira
Keyword(s):  
United States ◽  
Energy Consumption ◽  
South America ◽  
Internal Combustion Engine ◽  
Fossil Fuels ◽  
Combustion Engine ◽  
Internal Combustion ◽  
The United States ◽  
Fuel Oil ◽  
Technological Developments

AbstractThis article explains how oil as an energy carrier evolved alongside the technology of the steam engine. In practical terms, fuel oil was adapted to machines that were originally devised to be coal-fuelled and this led to the flexible switchover between energy carriers. The article links the micro account of technological developments with the macro records of energy consumption, to reveal how steam technology set the stage for the commoditization of oil, the customary fuel of the internal combustion engine. The analysis of the oil–steam combine embraces its diffusion across leading producing nations such as Russia and the United States, the diffusion in industrial and transport activities in South America, and the diffusion throughout European navies. What was at stake was the transformation of oil into a geostrategic good and the triggering of an international race for the seizure of fossil fuels.

scholarly journals Kualitas Bahan Bakar Biogas Limbah Cair Tahu Dengan Penggunaan Variasi Komposisi Starter

2020 ◽  
Vol 5 (2) ◽  
pp. 17-21
Author(s):  
Nely Ana Mufarida ◽  
Asroful Abidin
Keyword(s):  
Renewable Energy ◽  
Fossil Fuels ◽  
Liquid Waste ◽  
Primary Energy ◽  
Fuel Oil ◽  
Gas Content ◽  
Technological Developments ◽  
Materials Used ◽  
Gas Volume

Fossil fuels are a primary energy source. Fossil fuels that are widely used are in the form of fuel oil, gas fuel, and coal. Along with technological developments, the need for fossil fuels is increasing, which is followed by the depletion of supplies. Therefore, renewable energy is needed which is cheap and easy to use on a household scale such as biogas. Therefore, renewable energy is needed, which is cheap and easy to use on a household scale such as biogas. The materials used as biogas are tofu liquid waste with a yeast starter, EM-4, and horse manure. Tests on the quality of tofu liquid waste biogas conducted in this study include; Gas volume, temperature, degree of acidity (pH), C/N ratio, and gas content, namely methane (CH4), hydrogen sulfide (H2S), carbon monoxide (CO), and oxygen (O2). In the test results, it was found that the increase in the quality of tofu liquid waste biogas by using horse dung starter was producing a volume of 513.6 ml, a temperature of 31.7oC, a C/N ratio of 5.336, a CH4 content of 69%, and H2S content of 5 ppm, a CO content of 9 ppm and an O2 content of 16.3%.

A Nonlinear System for Harvesting Energy From Sustained Low-Level Vibration

2012 ◽  
Author(s):  
Kevin Remick ◽  
Angela Triplett ◽  
D. Dane Quinn ◽  
Donald M. McFarland ◽  
Alexander Vakakis ◽  
...  
Keyword(s):  
Energy Source ◽  
Energy Harvesting ◽  
Environmental Conditions ◽  
Dynamic Instability ◽  
Ambient Vibration ◽  
Linear Oscillator ◽  
Frequency Content ◽  
Impact Frequency ◽  
Low Level ◽  
Harvesting Systems

We address the conversion of mechanical energy from low-level ambient vibration into usable electrical energy. Development of this self-renewing energy source is vital to portable electronics and wireless sensors, especially since battery development has reached a plateau over the past decade. The passive nature of the proposed energy harvesting system provides for this self-renewing energy source. Conventional vibration energy harvesting systems are often based on linear elements, requiring specific tuning to achieve resonance and, thus, acceptable performance. This tuning is based on the predominant frequency of the ambient vibration. Linear energy harvesting systems are less desirable because ambient environmental conditions such as frequency content change with time, decreasing the performance of the system. This project focuses on the unique properties of a class of strongly nonlinear vibrating systems to effectively harvest energy under several excitation conditions. These excitations include low-level vibration from a wide range of environmental conditions including frequency content and low-level successive impulses at various frequencies. The later excitation condition is examined in this work. Numerical simulations of the proposed model, an essentially nonlinear oscillator with purely cubic stiffness attached to a larger grounded linear oscillator, have shown capture into sustained dynamic instability from successive low-level impulsive excitations. This sustained dynamic instability results in high energy harvesting efficiency. The electromechanical coupling is realized by a piezoelectric element in the mechanical system with voltage dissipated across a resistive load in the electrical system. This study focuses on characterizing the response of the system to varying parameters, such as fundamental period of the linear oscillator, impact frequency, and impact magnitude. An optimal fundamental period and impact frequency for dynamic instability are examined in this work. Analysis of the frequency-energy relation reveals the presence of sustained dynamic instability when the system operates under these specific parameters, leading to an optimized system for experimental validification.

Analysis of magneto rheological elastomers for energy harvesting systems

2020 ◽  
Vol 64 (1-4) ◽  
pp. 439-446
Author(s):  
Gildas Diguet ◽  
Gael Sebald ◽  
Masami Nakano ◽  
Mickaël Lallart ◽  
Jean-Yves Cavaillé
Keyword(s):  
Magnetic Field ◽  
Energy Harvesting ◽  
Shear Strain ◽  
Magnetic Induction ◽  
Magnetic Particles ◽  
Homogeneous Magnetic Field ◽  
Electrical Signal ◽  
Harvesting Systems ◽  
Dc Bias ◽  
Magneto Rheological

Magneto Rheological Elastomers (MREs) are composite materials based on an elastomer filled by magnetic particles. Anisotropic MRE can be easily manufactured by curing the material under homogeneous magnetic field which creates column of particles. The magnetic and elastic properties are actually coupled making these MREs suitable for energy conversion. From these remarkable properties, an energy harvesting device is considered through the application of a DC bias magnetic induction on two MREs as a metal piece is applying an AC shear strain on them. Such strain therefore changes the permeabilities of the elastomers, hence generating an AC magnetic induction which can be converted into AC electrical signal with the help of a coil. The device is simulated with a Finite Element Method software to examine the effect of the MRE parameters, the DC bias magnetic induction and applied shear strain (amplitude and frequency) on the resulting electrical signal.

Utilization of pomegranate waste-peel as a novel substrate for biodiesel production by Bacillus cereus (MF908505)

2020 ◽  
Vol 4 (3) ◽  
pp. 1199-1207
Author(s):  
Amruta P. Kanakdande ◽  
Chandrahasya N. Khobragade ◽  
Rajaram S. Mane
Keyword(s):  
Energy Source ◽  
Renewable Energy Source ◽  
Renewable Energy ◽  
Bacillus Cereus ◽  
Fossil Fuels ◽  
Biodiesel Production ◽  
Energy Needs

The continuous rising demands and fluctuations in the prices of fossil fuels warrant searching for an alternative renewable energy source to manage the energy needs.

scholarly journals Evaluating the performance of multivariate indicators of resilience loss

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Els Weinans ◽  
Rick Quax ◽  
Egbert H. van Nes ◽  
Ingrid A. van de Leemput
Keyword(s):  
Time Series ◽  
Complex Systems ◽  
Multivariate Time Series ◽  
Tipping Points ◽  
Physical And Mental Health ◽  
One Dimensional ◽  
Slowing Down ◽  
The Past ◽  
Technological Developments ◽  
Resilience Indicators

AbstractVarious complex systems, such as the climate, ecosystems, and physical and mental health can show large shifts in response to small changes in their environment. These ‘tipping points’ are notoriously hard to predict based on trends. However, in the past 20 years several indicators pointing to a loss of resilience have been developed. These indicators use fluctuations in time series to detect critical slowing down preceding a tipping point. Most of the existing indicators are based on models of one-dimensional systems. However, complex systems generally consist of multiple interacting entities. Moreover, because of technological developments and wearables, multivariate time series are becoming increasingly available in different fields of science. In order to apply the framework of resilience indicators to multivariate time series, various extensions have been proposed. Not all multivariate indicators have been tested for the same types of systems and therefore a systematic comparison between the methods is lacking. Here, we evaluate the performance of the different multivariate indicators of resilience loss in different scenarios. We show that there is not one method outperforming the others. Instead, which method is best to use depends on the type of scenario the system is subject to. We propose a set of guidelines to help future users choose which multivariate indicator of resilience is best to use for their particular system.

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