Power and Energy Commons^™

Preparation And Electrochemical Properties Of Attapulgite-Supported Nitrogen-Doped Carbon@Nico2O4 Composites For Supercapacitors, Hui Wan, Zong-Rong Ying, Xin-Dong Liu, Jian-Jian Lu, Wen-Wen Zhang

Journal of Electrochemistry

In this work, the attapulgite-supported nitrogen-doped carbon (ANC) was prepared by in-situ chemically polymerizing polyaniline coating upon attapulgite, followed by high temperature heat treatment, and then NiCo₂O₄was reacted onto the surface of ANC by a combination of hydrothermal reaction and calcination to synthesize ANC@NiCo₂O₄ composites. The chemical composition and morphology of the samples were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and N₂ adsorption/desorption. The electrochemical properties were evaluated by means of constant current charge discharge (GCD) and cyclic voltammetry (CV). …

An Investigation In The Performance Of Lithium Sulfur Battery With A Tic Coated Separator, Jian-Hua Fang, Yong Cao, Mao-Ping Yang, Ming-Sen Zheng, Quan-Feng Dong

Journal of Electrochemistry

To improve the specific capacity and cycle stability of lithium-sulfur (Li-S) battery, a TiC/Celgard coating separator was developed and its performance in Li-S battery was investigated. The electrochemical test results confirmed that the TiC coating layer could significantly increase the capacity and cycle stability. At a high rate of 2C, it still delivered the capacity of 650 mAh·g^-1. At 0.5C, the specific capacity was maintained at 841.3 mAh·g^-1 after 100 cycles.

Direct Electrochemistry Of Glucose Oxidase Based On Ws2 Quantum Dots And Its Biosensing Application, Chen-Lu Li, Hua-Ping Peng, Zhong-Nan Huang, Yi-Lun Sheng, Pei-Wen Wu, Xin-Hua Lin

Journal of Electrochemistry

In this study, a novel electrochemical glucose biosensor has been developed by immobilizing glucose oxidase (GOx) on tungsten disulfide quantum dots (WS₂ QDs) on the surface of glassy carbon electrode (GCE). Transmission electron microscopy, UV-vis spectroscopy and cyclic voltammetry were employed to characterize the morphology, structure, and electrochemical behaviors of the as-prepared WS₂ QDs and the biofilm modified electrode. The results suggested that the WS₂ QDs could accelerate the electron transfer between the electrode and the immobilized enzyme, which enabled the direct electrochemistry of GOx without any electron mediator. Besides, the immobilized GOx in WS₂ QDsfilm …

Application Of Adamantane Schiff Base Nickel Complexes/Graphene Oxide/Glassy Carbon Modified Electrode In Detection Of Carmine, Peng Guo, Zheng Liu, Hai-Ying Li, Li-Ming Ma

Journal of Electrochemistry

The Schiff base nickel complexes/graphene oxide/glassy carbon electrodes were prepared by embedded method and electrodeposition on which were used to quantitatively detect the contents of carmine. Cyclic voltammetry, chronoamperometry, scanning electron microscopy (SEM) and other methods were employed to characterize properties and morphologies of the modified electrodes. The results show that the adamantane double Schiff base nickel complexes/graphene oxide/glassy carbon electrode had high electric catalytic activity toward carmine oxidation reaction, and might provide an easy and quick way to detect carmine content with good reproducibility.

Energy Management System Modeling Of Dc Data Center With Hybrid Energy Sources Using Neural Network, Khalid Althomali

Master's Theses

As data centers continue to grow rapidly, engineers will face the greater challenge in finding ways to minimize the cost of powering data centers while improving their reliability. The continuing growth of renewable energy sources such as photovoltaics (PV) system presents an opportunity to reduce the long-term energy cost of data centers and to enhance reliability when used with utility AC power and energy storage. However, the inter-temporal and the intermittency nature of solar energy makes it necessary for the proper coordination and management of these energy sources.

This thesis proposes an energy management system in DC data center using …

Stakeholder Outcomes In A Wind Turbine Investment; Is The Irish Energy Policy Effective In Reducing Ghg Emissions By Promoting Small-Scale Embedded Turbines In Sme's?, Tony Kealy

Articles

As a member state of the European Union (EU), Ireland has adopted an energy policy which includes promoting wind powered electricity generators as an economically viable, GHG-reducing, alternative to environmentally damaging fossil-fuel driven electrical generators. This longitudinal, inductive in-depth study investigates the outcomes for the government and other stakeholders involved in a wind turbine project investment by a Small-to-Medium-Enterprise (SME) based in rural Ireland. A case study research methodology is used to acquire and analyse quantitative numerical data from multiple sources including electrical power and energy meters, historical electricity bills and company sustainability reports. The study found that the installation …

2017 Spring Engr333 Project Assignment, Matthew K. Heun

ENGR 333

The Spring 2017 ENGR333 project focused on campus energy consumption.

I asked the students “Can you construct a fine-grained, bottom-up electricity demand model that predicts the annual electricity consumption for the dormitories (section A) and the PE complex (section B) for each year of the last decade with an accuracy of ±2%?”

Customer

The customer for this project was Jack Phillips, Assistant Director (Mechanical) at Calvin’s Physical Plant.

Coreless Multidisc Axial Flux Pm Machine With Carbon Nanotube Windings, Vandana Rallabandi, Narges Taran, Dan M. Ionel, John F. Eastham

Power and Energy Institute of Kentucky Faculty Publications

Coreless axial flux permanent magnet (AFPM) machines are attracting increasing attention due to their compact structure and high torque density. The torque to weight ratio can be further enhanced by the use of alternate conductor materials, such as carbon nanotube (CNT), or aluminum windings in place of the copper material coils. This paper proposes a coreless AFPM synchronous motor with CNT windings. Analytical equations are developed to allow a systematic comparison of machine designs with different conductor materials. The performance of machine designs with different coil materials, namely, copper, aluminum, and CNT, is evaluated and compared. The calculations are also …

Ocean Renewable Power Company, James Donegan

MARENER 2017

No abstract provided.

Lighting Standards For Ship And Alternative Solutions For Energy Efficiency, Efe Akyurek

MARENER 2017

Lighting has an important role amongst human life. In this respect, an adequate lighting on board gives moral, motivation also helps to improve safety and security for ships’ crew. This paper aims to both determine an adequate lighting for crew and bring energy efficiency with optimal lighting considering existing regulations on shipboard lighting. After a brief introduction, on the first part the preferred lighting tendencies to be discussed at maritime regulatory base including SOLAS, MLC with comparing ILO 92/133 Conventions. The second part initially defines optimal lighting for crew accommodation and working areas with demonstrating an example on a river …

Overcoming The Challenges To Maritime Energy Efficiciency In The Caribbean Region, Deniece Aiken

MARENER 2017

Maritime energy efficiency in the Caribbean appears to be predicated on two key requirements; regulatory controls over the vessels operating in the region and the availability and use of efficient technology. While many Caribbean territories have ratified MARPOL AnnexVI, implementation of the standards therein, presents challenges that are familiar to maritime administrators of the region. These challenges include insufficient resources and inadequate implementation of relevant standards. These issues have traditionally plagued the region. The paucity of data and monitoring in this part of the world also contributes to ineffective policy interventions. There is also a need to identify the gap …

The Law Of Conservation Of Energy Towards Defining Maritime Cluster Dynamics, Peter J. Stavroulakis, Stratos Papadimitriou, Ioannis Koliousis

MARENER 2017

Industrial clusters have for many decades been considered as the stepping stone for regional and national competitiveness, due to the fact that within these systems of economies, many propitious qualities seem to flourish. Competition and cooperation are witnessed to complement one another, firms can thrive through the marvels of knowledge creation and innovation, and positive externalities are seen to blossom into an interconnected system of collective prosperity. This system bears semblance to many occurrences in nature, and thus can guide the reflection of natural dynamics that may pave an industrial cluster’s threads. Maritime clusters in particular, are distinct vanguards of …

Costs And Benefits Of Lng Economic Development In The Baltic And Arctic Regions, Fabio Ballini, Lawrence Kuroshi

MARENER 2017

Global warming is becoming increasingly evident. However, rising temperatures also offer new economic opportunities, such as new maritime routes in previously ice-locked waters. Valuable minerals in the Arctic region are also becoming more accessible. Maritime stakeholders are therefore seeking to operate in this remote region safely and efficiently. Accommodating these developments from a regulatory standpoint, IMO has amended the International Convention for the Prevention of Pollution from Ships (MARPOL) to include Chapter 9 of Annex I, prohibiting the use of heavy-grade marine fuels as well as heavy-duty oils as cargo carriage in the seas beyond 60th parallel south. In addition, …

Energy Consumption Of Small Scale Fishing Vessel Operations In Indonesia: A Case Study In Palabuhanratu, Indonesia, Vita R. Kurniawati, Richard W. Birmingham, Alan J. Murphy

MARENER 2017

About 79% of the global fishing fleet is small motorized boats typically operating in coastal areas, supplying local markets, and contributing to human well-being through food supplies and economic development. For example, Indonesian fisheries which predominantly are artisanal fishing, have supported 54% of animal protein intake, accounted for 2% of employment level and increased the fishermen’s prosperity index by 2.44%. However, they cause significant environmental impacts including fish resource depletion and intensive energy use. Balancing the benefits and challenges, sustainably managing these fishing operations is an important yet complex task given the requirements to proportionally account for fish resources, fishing …

Energy Awareness – Do We Need A Definition In Order To Implement It Onboard?, Signe Jensen

MARENER 2017

Energy optimization and the awareness about the issue has become an important topic in the maritime industry. An energy management study from 2015 performed by DNV GL, shows that energy awareness has moved from rank fifteen to be the most important measure to be implemented as a success factor to realize actual savings. However - What exactly is energy awareness, and how can it be defined and implemented? Are Ship Energy Efficiency Management Plans (SEEMP), noon reports and decision support software the right tools to raise awareness and improve energy efficiency for all shipping companies. Previous studies show that smaller …

Efficient Planar Heterojunction Perovskite Solar Cells With Li-Doped Compact Tio2 Layer, Detao Liu, Shibin Li, Peng Zhang, Yafei Wang, Rui Zhang, Hojjatollah Sarvari, Feng Wang, Jiang Wu, Zhiming Wang, Zhi Chen

Electrical and Computer Engineering Faculty Publications

Perovskite solar cells (PSCs) have been developed rapidly in recent time, and efficient planar PSCs are regarded as the most promising alternative to the Si solar cells. In this study, we demonstrated that Li-doping of compact TiO₂ can reduce the density of electron traps and increase the conductivity of the electron transport layer (ETL) of PSCs. Due to the improved electronic property of ETL, the Li-doped compact TiO₂ based planar heterojunction PSCs exhibit negligible hysteretic J-V behavior. Comparing with the undoped compact TiO₂ based PSCs, the power conversion efficiency (PCE) of the Li-doped compact TiO₂ film …

Data-Centric Situational Awareness And Management In Intelligent Power Systems, Xiaoxiao Dai

Electronic Theses and Dissertations

The rapid development of technology and society has made the current power system a much more complicated system than ever. The request for big data based situation awareness and management becomes urgent today. In this dissertation, to respond to the grand challenge, two data-centric power system situation awareness and management approaches are proposed to address the security problems in the transmission/distribution grids and social benefits augmentation problem at the distribution-customer lever, respectively.

To address the security problem in the transmission/distribution grids utilizing big data, the first approach provides a fault analysis solution based on characterization and analytics of the synchrophasor …

Risk Optimized Microgrid Resource Management, Thomas William Cashel Iii

Electronic Theses and Dissertations

This thesis proposes a risk based price adjustment method for a day ahead scheduling of a distribution side tiered community microgrid within a transactive energy style market. The system is organized into a master controller and local controller confïguration to simulate behind meter activity that is not visible to the master controller. Conditional value at risk is used to asses the risk of distributed energy resources in each local controller and the risk for each local controller is aggregated providing each local controller a single risk value. Each device's, or local controller's, risk value is used to adjust the price …

Computational Modeling Of A Williams Cross Flow Turbine, Sajjan Pokhrel

Browse all Theses and Dissertations

Hydropower is not only the most used renewable energy source in the United States, but in the world. While it is well known that large hydropower facilities, like the Hoover Dam, provide large amounts of electrical power, there is also a tremendous opportunity for hydroelectric power generation from small scale facilities that has largely been overlooked. The work being presented here studies a new cross flow turbine called the Williams Cross Flow Turbine (WCFT), which was designed to extract electric energy from low head, run-of-the-river, small hydropower sites. To spur the implementation of the WCFT in small hydropower applications, and …

Design And Performance Analysis Of Small Scale Horizontal Axis Wind Turbine For Nano Grid Application, Md Mehedi Hasan

College of Graduate Studies: Theses & Dissertations

Wind energy, being easily accessible, environmentally friendly, and being cost effective, has become one of the world’s popular growing renewable energy sources of electricity generation. To spread this technology to mankind it is necessary to develop turbines in this way that people can use it individually and comfortably. This kind of thinking accelerates the advancement of integration of wind turbine with Nano grid concept. Although significant progress has been achieved in the wind technology, there is still scope to reduce the cost and improve the performance of small-scale wind turbines. Moreover, low wind velocity should also need to be utilized …