Recycling Wasted Energy for Mobile Charging

2021 ◽  
Author(s):  
Yu Sun ◽  
Chi Lin ◽  
Haipeng Dai ◽  
Pengfei Wang ◽  
Jiankang Ren ◽  
...  
Keyword(s):  
Wasted Energy

Ghost Dancing

2017 ◽  
Author(s):  
Kélina Gotman
Keyword(s):  
Native American ◽  
Participant Observation ◽  
Land Rights ◽  
State Of Exception ◽  
Washington Dc ◽  
Dance Movement ◽  
Ghost Dance ◽  
The Government ◽  
Wasted Energy ◽  
The U.S

Native American dancers in the 1890s rebelling against the U.S. government’s failure to uphold treaties protecting land rights and rations were accused of fomenting a dancing ‘craze’. Their dancing—which hoped for a renewal of Native life—was subject to intense government scrutiny and panic. The government anthropologist James Mooney, in participant observation and fieldwork, described it as a religious ecstasy like St. Vitus’s dance. The Ghost Dance movement escalated with the proliferation of reports, telegraphs, and letters circulating via Washington, DC. Although romantically described as ‘geognosic’—nearly mineral—ancestors of the whites, Native rebels in the Plains were told to stop dancing so they could work and thus modernize; their dancing was deemed excessive, wasteful, and unproductive. The government’s belligerently declared state of exception—effectively cultural war—was countered by one that they performed ecstatically. ‘Wasted’ energy, dancers maintained, trumped dollarization—the hollow ‘use value’ of capitalist biopower.

scholarly journals Optimization of MCM-41 Mesoporous Material Mixed Matrix Polyethersulfone Membrane for Dye Removal

Membranes ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 414
Author(s):  
Rana J. Kadhim ◽  
Faris H. Al-Ani ◽  
Qusay F. Alsalhy ◽  
Alberto Figoli
Keyword(s):  
Membrane Fouling ◽  
Mesoporous Material ◽  
Optimization Technique ◽  
Operating Conditions ◽  
Mixed Matrix ◽  
Pareto Chart ◽  
Significance Level ◽  
Pes Membrane ◽  
Wasted Energy ◽  
Mcm 41

The aim of this work is the optimization of the operating conditions under which MCM-41-mesoporous material can be incorporated into polyethersulfone (PES)/MCM-41 membranes for nanofiltration (NF) applications. MCM-41 mesoporous material mixed matrix PES membranes have the potential to reduce membrane fouling by organic dye molecules. Process optimization and modeling aim to reduce wasted energy while maintaining high flow during the operation to handle the energy efficiency problems membranes often have. An optimization technique was applied to obtain optimum values for some key parameters in the process to produce a certain amount of flux above the desired values. Response surface methodology (RSM) and analysis of variance (ANOVA) were used as mathematical and statistical analyses to improve the performance of the process on a larger scale. This work investigated the influence of the operating parameters, such as the feed pH values (3–11), MCM-41 content (0–1 wt.%), and the feed dye concentration (10–100 ppm) for each of the two studied dyes, acid black 210 (AB-210) and rose bengal (RB), and their interactions on the PES membrane permeability. The results showed that the PES membrane had the best performance at 64.25 (L·m−2·h−1·bar-1) and 63.16 (L·m−2·h−1·bar-1) for the AB-210 and RB dyes, respectively. An MCM-41 content of nearly 0.8 wt.% in the casting solution, feed dye concentration of 10 ppm for the studied dyes, and feed pH of 3 for the RB dye was found to be the optimal parameters for eliciting the response. The pH had no significant influence on the response for the AB-210 dye, while the pH shows some minor effects on response with the RB dye, and the Pareto chart of the standardized effects on the permeation flux of both dyes using statistically significant at the 5% significance level support these results.

scholarly journals Can a Semi-Active Energy Harvesting Shock Absorber Mimic a Given Vehicle Passive Suspension?

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4378
Author(s):  
Jorge A. Reyes-Avendaño ◽  
Ciro Moreno-Ramírez ◽  
Carlos Gijón-Rivera ◽  
Hugo G. Gonzalez-Hernandez ◽  
José Luis Olazagoitia
Keyword(s):  
Energy Harvesting ◽  
Load Resistance ◽  
Ball Screw ◽  
External Energy ◽  
Shock Absorbers ◽  
Great Progress ◽  
Control Circuits ◽  
Minimum Velocity ◽  
Wasted Energy ◽  
At Will

Energy harvesting shock absorbers (EHSA) have made great progress in recent years, although there are still no commercial solutions for this technology. This paper addresses the question of whether, and under what conditions, an EHSA can completely replace a conventional one. In this way, any conventional suspension could be replicated at will, while recovering part of the wasted energy. This paper focuses on mimicking the original passive damper behavior by continuously varying the electrical parameters of the regenerative damper. For this study, a typical ball-screw EHSA is chosen, and its equivalent suspension parameters are tried to be matched to the initial damper. The methodology proposes several electrical control circuits that optimize the dynamic behavior of the regenerative damper from the continuous variation of a load resistance. The results show that, given a target damper curve, the regenerative damper can adequately replicate it when there is a minimum velocity in the damper. However, when the damper velocity is close to zero, the only way to compensate for inertia is through the introduction of external energy to the system.

scholarly journals Reducing Energy Waste through Eco-Aware Everyday Things

2014 ◽  
Vol 10 (1) ◽  
pp. 79-103 ◽  
Author(s):  
Juan López-de-Armentia ◽  
Diego Casado-Mansilla ◽  
Sergio López-Pérez ◽  
Diego López-de-Ipiña
Keyword(s):  
Machine Learning ◽  
Research Laboratory ◽  
Operating Mode ◽  
Public Spaces ◽  
Learning Approaches ◽  
Usage Pattern ◽  
Electrical Devices ◽  
Wasted Energy ◽  
Reducing Energy ◽  
Coffee Machine

Society wastes much more energy than it should. This produces tons of unnecessary CO2emissions. This is partly due to the inadequate use of electrical devices given the intangible and invisible nature of energy. This misuse of devices and energy unawareness is particularly relevant in public spaces (offices, schools, hospitals and so on), where people use electrical appliances, but they do not directly pay the invoice to energy providers. Embedding intelligence within public, shared appliances, transforming them into Eco-aware things, is valuable to reduce a proportion of the unnecessarily consumed energy. To this end, we present a twofold approach for better energy efficiency in public spaces: (1) informing persuasively to concerned users about the misuse of electronic appliances; (2) Customizing the operating mode of this everyday electrical appliances as a function of their real usage pattern. To back this approach, a capsule-based coffee machine placed in a research laboratory has been augmented. This device is able to continuously collect its usage pattern to offer feedback to coffee consumers about the energy wasting and also, to intelligently adapt its operation to reduce wasted energy. To this aim, several machine learning approaches are compared and evaluated to forecast the next-day device usage.

FABRICATION AND TESTING OF ELECTROMAGNETIC ENERGY REGENERATIVE SUSPENSION SYSTEM

2015 ◽  
Vol 77 (21) ◽  
Author(s):  
Jazli Firdaus Jamil ◽  
Mohd Azman Abdullah ◽  
Norreffendy Tamaldin ◽  
Ahmed Esmael Mohan
Keyword(s):  
Electric Vehicles ◽  
Electric Energy ◽  
Electrical Energy ◽  
Suspension System ◽  
Electromagnetic Energy ◽  
Vehicle Suspension ◽  
Voltage Output ◽  
Vehicle Usage ◽  
Vehicle Suspension System ◽  
Wasted Energy

The world is demanding for alternative way of energy consumption for vehicle usage. The energy efficient vehicle (EEV) is one of the advancement for future land transportation that known as hybrid and electric vehicles nowadays. The vehicles use different energy other than fuel which is electric energy. This paper emphasizes the development of electromagnetic energy regenerative suspension system (EReSS) as a system that harvests energy from the vibration of vehicle suspension system. The harvested energy is converted to electrical energy for vehicle usage. A prototype of electromagnetic EReSS is fabricated and laboratory experimentation on test rig is conducted to test the voltage output. It is observed that the EReSS can harvest the wasted energy from the vibration and produce sufficient electric energy for the vehicle electrical and electronic usage. The number of windings of the coil and diameter of the coil affect the voltage output of the EReSS. The voltage output of the EReSS can be optimized by setting up the parameters. As the EReSS is proven to harvest energy, it can be used on hybrid and electric vehicle to improve the efficiency of the vehicle and reduce the fuel consumption.

scholarly journals The effect of type of sound damper material in the Helmholtz resonator to the output power spectrum of acoustic energy Harvester

2019 ◽  
Vol 3 (2) ◽  
pp. 50
Author(s):  
Hedwigis Harindra ◽  
Agung Bambang Setio Utomo ◽  
Ikhsan Setiawan
Keyword(s):  
Energy Harvesting ◽  
Power Spectrum ◽  
Electric Power ◽  
Energy Harvester ◽  
Helmholtz Resonator ◽  
Acoustic Energy ◽  
Acoustic Energy Harvesting ◽  
Wasted Energy ◽  
Second Peak ◽  
Output Electric Power

<span>Acoustic energy harvesting is one o</span><span lang="EN-US">f</span><span> many ways to harness </span><span lang="EN-US">acoustic </span><span>noises as wasted energy into use</span><span lang="EN-US">f</span><span>ul </span><span lang="EN-US">electical </span><span>energy using an acoustic </span><span>energy harvester. </span><span>Acoustic </span><span>energy harvester t</span><span lang="EN-US">h</span><span>at tested by Dimastya (2018) </span><span lang="EN-US">which is consisted of loudspeake</span><span>r </span><span lang="EN-US">and Helmholtz resonator, </span><span>produced two-peak spectrum. It is </span><span lang="EN-US">suspected</span><span> that the </span><span lang="EN-US">f</span><span>irst peak </span><span lang="EN-US">is due t</span><span>o </span><span lang="EN-US">Helmholtz</span><span> resonator resonance and the second peak </span><span lang="EN-US">comes</span><span lang="EN-US">from the resonance of the conversion </span><span>loudspeaker. </span><span lang="EN-US">This research is to experimentally confirm the guess of the origin of the first peak. The experiments are performed by adding silencer materials on the resonator inner wall which are expected to be able to reduce the height of first peak and to know </span><span>how </span><span lang="EN-US">they</span><span> a</span><span lang="EN-US">ff</span><span>ect t</span><span>he output electric power spectrum o</span><span lang="EN-US">f</span><span> t</span><span>he acoustic energy harvester. </span><span lang="EN-US">Three different silencer materials are used, those are</span><span> glasswool, acoustic </span><span lang="EN-US">f</span><span>oam, and styro</span><span lang="EN-US">f</span><span>oam</span><span lang="EN-US">,</span><span> with</span><span lang="EN-US"> the same thickness of</span><span> 12 cm. </span><span lang="EN-US">The r</span><span>esult</span><span lang="EN-US">s</span><span> show that glasswool absorb</span><span lang="EN-US">s</span><span> sound more e</span><span lang="EN-US">ff</span><span>ectively than acostic </span><span lang="EN-US">f</span><span>oam and styro</span><span lang="EN-US">f</span><span>oam. The use o</span><span lang="EN-US">f</span><span> glasswool, acoustic </span><span lang="EN-US">f</span><span>oam, and styro</span><span lang="EN-US">f</span><span>oam with 12 cm thickness lowered the </span><span lang="EN-US">f</span><span>irst peak </span><span lang="EN-US">by</span><span> 90% (</span><span lang="EN-US">f</span><span>rom 39 mW to 0,5 mW), 82% (</span><span lang="EN-US">f</span><span>rom 39 mW to 0,7 mW), and 82% (</span><span lang="EN-US">f</span><span>rom 39 mW to 0,7 mW), respectively. </span><span lang="EN-US">Based on these results, it is concluded that the guess of the origin of the first peak is confirmed.</span>

Development of a Dual-Fuel Gas Turbine Engine of Liquid and Low-Calorific Gas

2005 ◽  
Author(s):  
Masamichi Koyama ◽  
Hiroshi Fujiwara
Keyword(s):  
Gas Turbine ◽  
Sewage Treatment ◽  
Energy Resource ◽  
Biomass Energy ◽  
Dual Fuel ◽  
Fuel Gas ◽  
Turbine Engine ◽  
Reference Velocity ◽  
Continuous Use ◽  
Wasted Energy

We developed a dual-fuel single can combustor for the Niigata Gas Turbine (NGT2BC), which was developed as a continuous-duty gas turbine capable of burning both kerosene and digester gas. The output of the NGT2BC is 920 kW for continuous use with digester gas and 1375 kW for emergency use with liquid fuel. Digester gas, obtained from sludge processing at sewage treatment plants, is a biomass energy resource whose use reduces CO2 emissions and take advantage of an otherwise wasted energy source. Design features for good combustion with digester gas include optimized the good matching of gas injection and swirl air and reduced reference velocity. The optimal combination of these parameters was determined through CFD analysis and atmospheric rig testing.

Modeling of Gas Turbine-Based Cogeneration System

2012 ◽  
Author(s):  
Farshid Zabihian ◽  
Alan S. Fung ◽  
Fabio Schuler
Keyword(s):  
Power Plant ◽  
Gas Turbine ◽  
Power Plants ◽  
Superheated Steam ◽  
Hot Water ◽  
Cogeneration System ◽  
Exhaust Stream ◽  
Low Efficiency ◽  
Gas Turbine Cycle ◽  
Wasted Energy

Gas turbine-based power plants generate a significant portion of world’s electricity. This paper presents the modeling of a gas turbine-based cogeneration cycle. One of the reasons for the relatively low efficiency of a single gas turbine cycle is the waste of high-grade energy at its exhaust stream. In order to recover this wasted energy, steam and/or hot water can be cogenerated to improve the cycle efficiency. In this work, a cogeneration power plant is introduced to use this wasted energy to produce superheated steam for industrial processes. The cogeneration system model was developed based on the data from the Whitby cogeneration power plant in ASPEN PLUS®. The model was validated against the operational data of the existing power plant. The electrical and total (both electrical and thermal) efficiencies were around 40% and 70% (LHV), respectively. It is shown that cogenerating electricity and steam not only significantly improve the general efficiency of the cycle but it can also recover the output and efficiency losses of the gas turbine as a result of high ambient temperature by generating more superheated steam. Furthermore, this work shows that the model could capture the operation of the systems with an acceptable accuracy.

Sign in / Sign up

Export Citation Format

Share Document