Engineering Commons^™

Considerations Of The Impacts And System-Level Mitigation Of Electric Vehicle Charging On The Integrated Resource Planning Process, Grant Wollam

All Theses

Electric vehicles (EV) are growing in popularity and therefore adoption rate. Best estimates predict a 6.2% EV adoption rate by 2035 in the southeastern United States. With this level of EV adoption, utility planners must begin to consider the impact that EVs will have on the power grid. This paper aims to help predict these EV impacts on the power grid. Specifically, an urban-commercial feeder is analyzed in detail to provide worst-case and most-likely results of varying levels of EV impact. Results show that a 26.2% peak increase is the most likely result for this feeder in 2035.

Mitigation techniques …

Data-Enabled Distribution Grid Management, Zohreh Sadat Hosseini

Electronic Theses and Dissertations

In 2020, U.S. electric utilities installed more than 94 million advanced meters, which brought the percentage of residential customers equipped with smart meters to 75%. This significant investment allows collecting extensive customer data at the distribution level, however, the data are not currently leveraged effectively to help with system operations. This dissertation aims to use the smart meters’ data to improve the grid’s reliability, stability, and controllability by solving two of the most challenging problems at the distribution level, namely distribution network phase identification and outage identification.

Distribution networks have typically been the least observable and most dynamic and locally …

Reconfigurable Cushion Design For E-Commerce Packaging Using Kirigami Concept, Euihark Lee, Xingguang Pan, Hannah Kim, Kazuko Fuchi

Journal of Applied Packaging Research

In packaging, cushion barriers are needed to provide content protection in a disposable form. However, conventional cushioning materials and designs typically require a large volume, which decreases shipping and storage efficiency and increases environmental impact. Especially in e-commerce, where “shipping and handling” occur at an exceedingly rapid pace in large-scale operations, many packages suffer from being over or under packed through the fulfilment process. To solve this issue, this paper presents deployable kirigami-based cushion designs that can be collapsed or deployed depending on the distribution situation. Kirigami is a variation of origami that involves both cutting and folding of paper. …

Distribution And Occurrence Of Uranium In Coal And Its Migration Behavior During The Coal Utilization, Wang Wenfeng, Wang Wenlong, Liu Shuangshuang, Bai Hongyang, Wang Yulong, Duan Piaopiao, Qin Kemin, Chen Yilin

Coal Geology & Exploration

Coal and uranium resources are closely related in spatial disposition as well as mineralization, and the reasonable development, utilization and pollution control of them play an essential role in the sustainable development of our national economy and society. Based on a large number of literature research and the previous results of our research group, some conclusions were drawn with regard to the distribution and occurrence of uranium in coal `and its migration in the process of coal preparation, combustion and leaching:(1) The enrichment and mineralization of uranium in coal has reflected the evolution of coal-forming tectonics:The U-rich coal in Southwest …

Influence Of Rock Wettability On Thf Hydrate Saturation And Distribution In Sandstones, Ghazanfer Raza Abbasi, Ahmed Al-Yaseri, Abubakar Isah, Alireza Keshavarz, Sefan Iglauer

Research outputs 2014 to 2021

Natural gas trapped in hydrate deposits is a potentially enormous source of energy which can in principle be extracted from the underground reservoir structures. These reserves can potentially also catastrophically release very large quantities of greenhouse gases to the atmosphere. One key parameter which is well known to strongly influence fluid distribution, saturation, and production is rock wettability. However, the effect of wettability on gas hydrate in sediments has not been investigated yet. We thus used nuclear magnetic resonance (NMR) spectrometry to measure relaxation times (T₂ and T₁) and the corresponding surface relaxivity of tetrahydrofuran hydrate …

Technology And Technical Device Used In The Efficient Use Of Water Resources In Irrigated Agriculture, А.U. Аtajanov

Irrigation and Melioration

The economical use of water resources, the improvement and development of new technology and technical means for its implementation, ensuring the saving of irrigation water is one of the most important issues of today. This article is devoted to the issues of improving the technology of irrigation of furrows and the creation of technical means,also recommended technology and using from created technical device in selected per experiment fields and analyzing their results.

Pre-Construction Documents For A Mobile Food Assembling & Distribution Station, Winnie He

Construction Management

On Christmas Eve of 2018, Jessica He Liu, a chef in Los Angeles opened her home to friends and family to volunteer and help assemble food boxes and personal hygiene products and distributed these goods out to those in need. What started off as a goal to spread kindness during the holidays, became a yearly traditional non-profit volunteering event for those families involved. In March 2020, the deadly COVID-19 pandemic took the world by surprise, causing a copious amount of social distancing guild lines to be formed and enforced. Although there was still a slight hope that the pandemic would …

Distribution Line Multi-Tool, Michael Andrew Garcia, Drew Miller, Sukhdeep Singh, Ritwik Kesavath

Electrical Engineering

Power companies are always interested in the best possible monitoring equipment for their grid. The power line multi-tool developed would aid in the monitoring of the power system’s distribution network. This device assesses the current conditions of distribution power lines. The device is able to measure current, detect downed power lines, as well as recognize fire starting conditions, and have wireless communication for ease of access and installation. Overall this device greatly aids in helping utilities monitor their grid in more detail.

With the increase of dry climates yearly, several utility companies are taking measures to aid in the prevention …

Three-Dimensional Velocity Distribution In Straight Smooth Channels Modeled By Modified Log-Law, Shu-Qing Yang, Muhammad Zain Bin Riaz, Muttucumaru Sivakumar, Keith Enever, Nadeeka Miguntanna

Faculty of Engineering and Information Sciences - Papers: Part B

Time-average velocity distribution in steady and uniform channel flows is important for fundamental research and practical application as it is always three-dimensional (3D), regardless of channel geometry. However, its determination has predominantly been carried out by using complex numerical software, even for the simplest geometry such as rectangular channels. The log-law was developed initially for circular pipe flows, where a single shear velocity is used to normalize the velocity (u+) and its distance (y+). Tracy and Lester found that the performance of the log-law can be extended to express velocity profiles in rectangular channels when the global shear velocities (gRS)0.5 …

A Noise Study Of The Psw Signature Family: Patching Drs With Uniform Distribution, Arnaud Sipasseuth, Thomas Plantard, Willy Susilo

Faculty of Engineering and Information Sciences - Papers: Part B

At PKC 2008, Plantard et al. published a theoretical framework for a lattice-based signature scheme, namely Plantard-Susilo-Win (PSW). Recently, after ten years, a new signature scheme dubbed the Diagonal Reduction Signature (DRS) scheme was presented in the National Institute of Standards and Technology (NIST) PQC Standardization as a concrete instantiation of the initial work. Unfortunately, the initial submission was challenged by Yu and Ducas using the structure that is present on the secret key noise. In this paper, we are proposing a new method to generate random noise in the DRS scheme to eliminate the aforementioned attack, and all subsequent …

Employee Engagement And Job Satisfaction’S Impact On Productivity In The Distribution Industry, Jessica Copeland

Walden Dissertations and Doctoral Studies

Productivity deficiencies in distribution services are detrimental to profitability, annually causing billions of dollars in reporting losses industry-wide. Understanding employees’ motivating factors in meeting metric-based expectations is essential to enhancing overall performance. Grounded in the motivation-hygiene theory, the purpose of this correlational study was to examine the relationships among employee engagement, job satisfaction, and productivity within the distribution industry. Electronic survey data were analyzed for 47 participants who completed the Mensah Employee Engagement Survey, Mensah Job Satisfaction Survey, and Utrecht Work Employee Engagement Survey. The results of the multiple linear regression were significant, F(2, 44) = 36.84, p = .001, …

Wintertime Spatial Distribution Of Ammonia And Its Emission Sources In The Great Salt Lake Region, Alexander Moravek, Jennifer G. Murphy, Amy Hrdina, John C. Lin, Christopher Pennell, Alessandro Franchin, Ann M. Middlebrook, Dorothy L. Fibiger, Caroline C. Womack, Erin E. Mcduffie, Randy S. Martin, Kori D. Moore, Munkhbayar Baasandorj, Steven S. Brown

Civil and Environmental Engineering Faculty Publications

Ammonium-containing aerosols are a major component of wintertime air pollution in many densely populated regions around the world. Especially in mountain basins, the formation of persistent cold-air pools (PCAPs) can enhance particulate matter with diameters less than 2.5 µm (PM_2.5) to levels above air quality standards. Under these conditions, PM_2.5 in the Great Salt Lake region of northern Utah has been shown to be primarily composed of ammonium nitrate; however, its formation processes and sources of its precursors are not fully understood. Hence, it is key to understanding the emission sources of its gas phase precursor, ammonia …

Sec-Lib: Protecting Scholarly Digital Libraries From Infected Papers Using Active Machine Learning Framework, Nir Nissim, Aviad Cohen, Jian Wu, Andrea Lanzi, Lior Rokach, Yuval Elovici, Lee Giles

Computer Science Faculty Publications

Researchers from academia and the corporate-sector rely on scholarly digital libraries to access articles. Attackers take advantage of innocent users who consider the articles' files safe and thus open PDF-files with little concern. In addition, researchers consider scholarly libraries a reliable, trusted, and untainted corpus of papers. For these reasons, scholarly digital libraries are an attractive-target and inadvertently support the proliferation of cyber-attacks launched via malicious PDF-files. In this study, we present related vulnerabilities and malware distribution approaches that exploit the vulnerabilities of scholarly digital libraries. We evaluated over two-million scholarly papers in the CiteSeerX library and found the library …

Optimización Del Sistema De Potabilización De La Vereda San Antonio Del Municipio De Zipaquirá, Cundinamarca, Dany Alejandro Fuentes Sotelo, Jessica Dayanna Rodríguez Ríos

Ingeniería Ambiental y Sanitaria

El presente trabajo expone el resultado de la evaluación del sistema de abastecimiento de la vereda San Antonio en el municipio de Zipaquirá, Cundinamarca, con el objetivo de establecer una alternativa al problema identificado durante la fase de diagnóstico, con base en los análisis fisicoquímicos y microbiológicos de la calidad del agua se identificó que el agua no es apta para consumo humano por lo que se diseñaron dos alternativas de plantas de tratamiento. Por medio de una matriz DOFA se definió cual alternativa era la indicada para satisfacer las necesidades de la vereda y finalmente se determinó la viabilidad …

Transportation And Distribution Of Strategic National Stockpile Supplies In A Public Health Emergency, Olivia A. Goss

Industrial Engineering Undergraduate Honors Theses

In the event of a public health emergency in the United States, it is important that public

authorities are equipped to distribute medical supplies to every person in need as quickly as

possible. Federal guidelines state that all persons in an area affected by a public health

emergency should receive their medical countermeasures within 48 hours of the emergency’s

declaration. While the CDC has determined a general dispensing plan for each state and county

to follow, it is ultimately up to the state and county to formalize and implement detailed plans.

A body of academic literature focuses on optimizing the …

Modeling Of A Battery Storage System On A Distribution Feeder, Aaron M. Griego

Electrical and Computer Engineering ETDs

Driven by the need to reduce harmful emissions and the desire to move away from our dependency on fossil fuels, we have seen a sharp increase in alternative energy research and development within the last decade. Amongst the many alternative energy sources, photovoltaics (PV) is becoming more commonplace in the power utility system.

With these new sources of renewable energy being widely adopted, there are causes for concern that power utility companies must address. One of the more present issues that have been noted is the reliability of the power being delivered; in particular with PV systems. Studies have shown …

Evaluation Of Stability Of Unit Loads For Tilt And Shock Events During Distribution, Jay Singh, Koushik Saha, Tyler Sewell

Journal of Applied Packaging Research

Initiatives to lightweight and reduce packaging materials to achieve sustainability goals have created unit load stability challenges in the transportation and handling of palletized packaged goods. Consequently, an increased focus is being placed on evaluating how current pre-shipment performance tests evaluate load stability. This study was undertaken to address the current need for establishing test methodologies towards observing a unit load’s overall stability during transportation and handling related activities commonly experienced in the distribution environment. With this goal, this study developed two test methods as well as apparatus/measuring tool to observe a palletized load’s overall stability. The experimentation involved unit …

Measurement And Analysis Of The Physical And Climatic Distribution Environment For Air Package Shipment, David Guadagnini

Master's Theses

The modern air parcel distribution industry has significantly grown to become one of the most commonly employed methods to quickly transport goods throughout the world. Although it comes with many benefits, including higher speed, greater reliability, and tighter security, the multimodal transport system within it can expose packages to a wide variety of climatic and physical distribution hazards. In a single route of transportation, packages could be included in different types of small delivery vans, large commercial semi trucks, cargo dollies, feeder aircraft, and high altitude commercial jetliners. The varying hazard level presented during distribution could directly weaken the packaging …

Thermal Comfort Evaluation Of A Mixed-Mode Ventilated Office Building With Advanced Natural Ventilation And Underfloor Air Distribution Systems, Xiang Deng, Georgios Kokogiannakis, Zhenjun Ma, Paul Cooper

Faculty of Engineering and Information Sciences - Papers: Part A

This study uses field monitoring and post occupancy evaluation (POE) surveys to investigate the indoor thermal comfort of an office building that is located in subtropical zone. The building is special as it combines advanced natural ventilation (ANV) strategies and underfloor air distribution (UFAD) systems. A comparison between a static thermal comfort model and a dynamic thermal comfort model is also conducted. The results show that the thermal comfort conditions in the case study building are satisfactory in summer while in winter there is evidence of thermal discomfort. For the case study building, the static thermal comfort model gives outputs …

Planning For Intermittent Water Supply In Small Gravity-Fed Distribution Systems: Case Study In Rural Panama, Frank B. Dubasik

Dissertations, Master's Theses and Master's Reports

Intermittent water supply (IWS) is defined as a piped water distribution system that operates in an intermittent fashion, i.e. less than 24 hours per day. Piped water distribution systems are designed to operate with continuous water supply (CWS), meaning the system is operated continuously and maintains positive pressures in the distribution network. Operating a system in an intermittent fashion can cause inequality of access in a water distribution system. It may also result in lower water quality and wear and tear on the system.

In the community of Espavé, Panamá a new water system was installed and brought online in …

Designing A Power Distribution System For The Arce 257 Revit Structural Model, Reid Wilhelm

Electrical Engineering

The construction industry needs engineers. Mechanical, electrical, and plumbing engineers, better known as MEPs, comprise a large number of employees who design and assist in the building of commercial structures. In particular, electrical engineers design power distribution systems for these buildings, including the power, lighting, low voltage, and fire protection subsystems.

Here at Cal Poly, architectural engineers enrolled in ARCE 257 create authentic structural plans for a fictitious two-story structure. This senior project transforms these structural plans into an architectural model and creates a power distribution system for the entire building. This is done through a building information modeling (BIM) …

Relaxation In Bolted Assemblies, Samuel Augustus Moeller

Theses and Dissertations

The purposes of this investigation were to (a) extend previously developed elastic spring models for bolt assemblies to include simulating creep loss in the bolt and the threads and (b) to present an approach in which appropriate spring stiffness in the model are determined rationally. Previous efforts at modeling tension in bolts have been limited in that they were not readily applicable to analyses of realistic bolted connections. The simulated load distributions on the shank and the threads in a single-bolt assembly showed good comparison to the gathered experimental data as did the simulated, time dependent creep loss in the …

Integration Of Sel Relays To Provide Motor, Transmission Line, And Transformer Protection, Christopher Ewing, Bryce Keefer

Electrical Engineering

The objective of this project is to familiarize the performers with the principles of operation of the Schweitzer Engineering Laboratories (SEL) protective relays in both normal and fault conditions. The SEL-587, SEL-311L and SEL-710 microprocessor-based relays are used to provide protection for a system composed of transformers, simulated transmission lines and a 3-phase induction motor. Each of these relays provides protection by sending a trip signal to local breakers upon sensing a fault condition. The SEL-587 provides overcurrent and differential protection for a 3-phase transformer, while the SEL-311L provides differential and distance protection for a transmission line, and negative sequence. …

Bbq Grill Temperature Uniformity Study, Monty Dodge Jr, Samuel Melo

Mechanical Engineering

Bull Outdoor Products, Incorporated, a barbeque grill and outdoor kitchen manufacturer, sponsored this project with the intent of improving the temperature uniformity across the surface of their barbecue grills. For this project, the Cal Poly team of mechanical engineering students, Monty Dodge Jr. and Samuel Melo, used the Brahma grill head model with setups for both natural gas and propane. In order to determine exactly what the uniformity across the grill surface was, the student team designed a testing apparatus which would measure a grid of temperature locations one inch apart spanning an area 16 by 36 inches. Developing a …

State Estimation – New Models On Power Distribution Networks Based On Weighted Least Squares Method In Line Current Measurements, Hugo Vicente Barrera

Masters Theses

Calculation of Load Flow distribution is an important tool in Electrical Engineering that involves numerical analysis applied to Power Systems. State Estimation techniques have been developed and applied thoroughly mainly in the levels of generation and transmission. Research in the distribution level remains a challenge due to the intrinsic characteristics of the network. Introducing line current measurements in the state estimation process constitutes an additional issue due to distribution networks characteristics. In order to overcome these difficulties, it is necessary to develop mathematical models that simulate the behavior of those networks. The solution of the problem of state estimation by …

Manipulation Of Nanoscale Domain Switching Using An Electron Beam With Omnidirectional Electric Field Distribution, Zi-Bin Chen, Xiaolin Wang, Simon Peter Ringer, Xiaozhou Liao

Australian Institute for Innovative Materials - Papers

Reversible ferroelectric domain (FD) manipulation with a high spatial resolution is critical for memory storage devices based on thin film ferroelectric materials. FD can be manipulated using techniques that apply heat, mechanical stress, or electric bias. However, these techniques have some drawbacks. Here we propose to use an electron beam with an omnidirectional electric field as a tool for erasable stable ferroelectric nanodomain manipulation. Our results suggest that local accumulation of charges contributes to the local electric field that determines domain configurations.

Online Coordinated Voltage Control In Distribution Systems Subjected To Structural Changes And Dg Availability, Dothinka Ranamuka Rallage, Ashish P. Agalgaonkar, Kashem M. Muttaqi

Faculty of Engineering and Information Sciences - Papers: Part A

The responses of multiple DG units and voltage regulating devices such as tap changers and capacitor banks for correcting the voltage may lead to operational conflicts and oscillatory transients, where distribution systems are subjected to network reconfiguration and changes in availability of the DG units. Therefore, coordinated voltage control is required to minimize control interactions while accounting for the impact of structural changes associated with the network. This paper proposes a strategy for coordinating the operation of multiple voltage regulating devices and DG units in medium voltage (MV) distribution systems, under structural changes and DG availability, for effective voltage control. …

A Review Of Protection Systems For Distribution Networks Embedded With Renewable Generation, Joel Kennedy, Philip Ciufo, Ashish P. Agalgaonkar

Faculty of Engineering and Information Sciences - Papers: Part A

The rapid growth of grid-connected embedded generation is changing the operational characteristics of power distribution networks. Amongst a range of issues being reported in the research, the effect of these changes on so-called 'traditional protection systems' has not gone without attention. Looking to the future, the possibility of microgrid systems and deliberate islanding of sections of the network will require highly flexible distribution management systems and a re-design of protection strategies. This paper explores the envisaged protection issues concerned with large penetrations of embedded generation in distribution networks extending into auto-reclosure and protection device coordination. A critical review of recently …

Influence Of Shielding Gas On Fume Formation Rate And Particle Size Distribution For Optimised Gmaw, Kristin Carpenter, Brian Monaghan, Alexander Nicholson, Dominic Cuiuri, John Norrish

Dominic Cuiuri

The influence of shielding gas on fume formation rate (FFR) and particle size distribution has been investigated by using a technique developed for automatic control of the welding voltage in gas metal arc welding (GMAW). The results for automatic control are compared with the use of a fixed voltage. Significant reductions in FFR and a general decrease in average particle size were observed using the automatic control technique. This reduction in FFR was attributed to improved metal transfer stability, via a reduction in the occurrence of repelled globular transfer, by promoting the 'drop-spray' transfer condition, together with a reduction in …

Cost-Based Decision Making Model For Regional In-House Versus Outsourcing Logistics, Henrik Darren Lee

Master's Theses

This thesis proposes a model for selecting between insourcing logistics for local distribution and outsourcing these functions to a third-party logistics (3PL) company. Supply chain optimization, as well as global supply chain management, are topics that are now well-covered; local distribution, despite its integral function in an organization, is much less researched. Models exist for network design and optimization, but the practical application of these network models may call for decisions and considerations that are not covered in these optimization models.

A breakeven analysis selection model between using in-house logistic system and 3PL is derived, considering various regional parameters. The …