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Articles 871 - 900 of 12092
Full-Text Articles in Entire DC Network
Coordinated Controls Of Residential Ev Chargers Considering High Power Appliances, Steven B. Poore, Rosemary E. Alden, Dan M. Ionel
Coordinated Controls Of Residential Ev Chargers Considering High Power Appliances, Steven B. Poore, Rosemary E. Alden, Dan M. Ionel
Electrical and Computer Engineering Graduate Research
In addition to electric vehicle (EV) adoption, the electricity demand of the modern grid is also under change from the replacement of resistive electric water heaters (EWHs) with high-efficiency heat pump electric water heaters (HPWH). Typical load of a HPWH has two parts: a low power compressor and a backup high power resistive boosting element. Within this paper, residential load from a large field demonstration for over one thousand homes is simulated in virtual power plant (VPP) operation with realistic HPWH and EV synthetic modules based on big data from the latest CBECC-Res and National Household Travel Survey (NHTS). Simultaneous …
Comparative Analysis Of Motors With Inner And Outer Reluctance Rotors And Pm Stators, Oluwaseun A. Badewa, Dan M. Ionel
Comparative Analysis Of Motors With Inner And Outer Reluctance Rotors And Pm Stators, Oluwaseun A. Badewa, Dan M. Ionel
Electrical and Computer Engineering Graduate Research
This paper presents a comparison of special outer and inner reluctance rotor motor topologies with permanent magnet (PM) stators having toroidal AC windings. A systematic approach is taken to study and discuss the design geometries, the respective impact on performance, and adoption of technological advancements such as stator-only cooling and hair-pin winding for high slot fill factor. Parametric FEA models are developed for both topologies, and design of experiments (DoE)-based sensitivity analysis is used to study the effect of independent variables on specific performance metrics such as torque, motor loss, torque ripple, and power factor. Inner and outer rotor topologies …
Sensorless Control Of Low Inductance Coreless Afpm Machines For Fault-Tolerant Operation Of Propulsion Systems, Yaser Chulaee, Ali Mohammadi, Aaron M. Cramer, Dan M. Ionel
Sensorless Control Of Low Inductance Coreless Afpm Machines For Fault-Tolerant Operation Of Propulsion Systems, Yaser Chulaee, Ali Mohammadi, Aaron M. Cramer, Dan M. Ionel
Electrical and Computer Engineering Graduate Research
In motor-drive systems utilized in safety-critical applications and demanding conditions like electric aircraft propulsion systems, the reliability of the system is greatly affected by position sensors, given their susceptibility within the motor drive system. Consequently, there is a need to eliminate sensors in vector-controlled motor drives to decrease overall hardware complexity and expenses, bolster the mechanical durability and dependability of the drive system. In this paper, a fault-tolerant sensorless control system for low inductance coreless axial flux PM (AFPM) machines, integrated into electric aircraft propulsion systems, is introduced. The proposed control system spans a wide operating range, from zero to …
Fault-Tolerant Axial Flux Coreless Pm Machines With Independent Phase Modules, Yaser Chulaee, Ali Mohammadi, Dan M. Ionel, Matin Vatani
Fault-Tolerant Axial Flux Coreless Pm Machines With Independent Phase Modules, Yaser Chulaee, Ali Mohammadi, Dan M. Ionel, Matin Vatani
Electrical and Computer Engineering Graduate Research
In this paper, a fault-tolerant two-phase high power coreless axial flux PM (AFPM) machine with a modular structure is introduced. The performance of this machine, in terms of torque, power density, and efficiency, is compared with its three-phase counterpart configuration based on finite element analysis (FEA) and experimental results. The fault tolerance of these two configurations, considering the control systems, is also compared. A detailed power loss breakdown for the prototype two-phase and three-phase printed circuit board (PCB) stator coreless AFPM machines derived from experiments is presented, showcasing that the introduced fault-tolerant two-phase machine has comparable performance and efficiency, while …
High-Power Polyphase Pcb-Type Inductive Coupler For Wireless Electric Vehicle Charging, Donovin D. Lewis, Omer Onar, Lucas Gastineau, John F. Eastham, Dan M. Ionel
High-Power Polyphase Pcb-Type Inductive Coupler For Wireless Electric Vehicle Charging, Donovin D. Lewis, Omer Onar, Lucas Gastineau, John F. Eastham, Dan M. Ionel
Electrical and Computer Engineering Graduate Research
The cost and manufacturing difficulty of traditionally wound coils for wireless charging of electric vehicles has led to the exploration of alternative manufacturing for scalable deployment at a range of rated powers. A rotating-field polyphase wireless coupler is developed with balanced fully pitched coils which are not possible with conventional Litz wire. The usage of printed circuit board (PCB) technology is proposed for the innovative construction at large dimensions due to reduced cost, increased ease of manufacturability, and potential geometric customization compared to would coils. Design considerations specific to PCBs are detailed for wireless power transfer coils including advantages such …
Comparative Analysis Of Vernier Machines With Spoke, Surface Mounted, And Halbach Pm Rotors For In-Wheel Traction, Ali Mohammadi, Aaron M. Cramer, Dan M. Ionel
Comparative Analysis Of Vernier Machines With Spoke, Surface Mounted, And Halbach Pm Rotors For In-Wheel Traction, Ali Mohammadi, Aaron M. Cramer, Dan M. Ionel
Electrical and Computer Engineering Graduate Research
Axial-flux Permanent Magnet (AFPM) machines are well-suited for in-wheel traction in electric vehicles due to their compact structure and higher torque density. This paper presents a large-scale design optimization of an axial-flux permanent magnet vernier machine (PMVM) of the MAGNUS type with a double stator configuration. The active stator features double layer wound coils, while the passive stator is unwound but has a similar profile. The reference design employs a rotor with permanent magnets (PMs) arranged in a spoke-type field intensifying pattern, providing high flux concentration. Design optimization was performed using 3-D electromagnetic Finite Element Analysis (FEA) and the Differential …
On The Optimal Design Of Coreless Afpm Machines With Halbach Array Rotors For Electric Aircraft Propulsion, Matin Vatani, Yaser Chulaee, Ali Mohammadi, David R. Stewart, John F. Eastham, Dan M. Ionel
On The Optimal Design Of Coreless Afpm Machines With Halbach Array Rotors For Electric Aircraft Propulsion, Matin Vatani, Yaser Chulaee, Ali Mohammadi, David R. Stewart, John F. Eastham, Dan M. Ionel
Electrical and Computer Engineering Graduate Research
This paper presents and evaluates the optimal design of a coreless axial flux permanent magnet (AFPM) motor for electric aircraft propulsion. Ferromagnetic cores are entirely removed from the machine’s structure to improve the specific power density and efficiency. An approach for envelope design optimization of the proposed motor is introduced, considering the polarity as an independent variable and employing an evolutionary algorithm and 3D Finite Element Analysis (FEA). In addition to the proposed electric motor’s electromagnetic performance, fault-tolerant capability and thermal management are considered in the optimization procedure. The optimization results and similar studies from power electronic and thermal management …
Working Well With Statisticians, Ryan A. Peterson, Emily Slade, Gina Maria Pomann, Walter T. Ambrosius
Working Well With Statisticians, Ryan A. Peterson, Emily Slade, Gina Maria Pomann, Walter T. Ambrosius
Biostatistics Faculty Publications
Statistical collaboration requires statisticians to work and communicate effectively with nonstatisticians, which can be challenging for many reasons. To identify common themes and lessons for working smoothly with nonstatistician collaborators, two focus groups of primarily academic collaborative statisticians were held. We identified qualities of collaborations that tend to yield fruitful relationships and those that tend to yield nothing (or worse, with one or both parties being dissatisfied). The initial goal was to share helpful knowledge and individual experiences that can facilitate more successful collaborative relationships for statisticians who work within academic statistical collaboration units. These findings were used to design …
Single-Cell Analysis Identifies Plk1 As A Driver Of Immunosuppressive Tumor Microenvironment In Luad, Yifan Kong, Chaohao Li, Jinpeng Liu, Sai Wu
Single-Cell Analysis Identifies Plk1 As A Driver Of Immunosuppressive Tumor Microenvironment In Luad, Yifan Kong, Chaohao Li, Jinpeng Liu, Sai Wu
Markey Cancer Center Faculty Publications
PLK1 (Polo-like kinase 1) plays a critical role in the progression of lung adenocarcinoma (LUAD). Recent studies have unveiled that targeting PLK1 improves the efficacy of immuno- therapy, highlighting its important role in the regulation of tumor immunity. Nevertheless, our understanding of the intricate interplay between PLK1 and the tumor microenvironment (TME) remains incomplete. Here, using genetically engineered mouse model and single- cell RNA-seq analysis, we report that PLK1 promotes an immunosuppressive TME in LUAD, characterized with enhanced M2 polarization of tumor associated macrophages (TAM) and dampened antigen presentation process. Mechanistically, elevated PLK1 coin- cides with increased secretion of CXCL2 …
Androgen Aggravates Aortic Aneurysms Via Suppression Of Pd-1 In Mice, Xufang Mu, Shu Liu, Zhuoran Wang, Kai Jiang, Timothy S. Mcclintock, Arnold Stromberg, Alejandro V. Tezanos, Eugene S. Lee, John A. Curci, Ming C. Gong, Zhenheng Guo
Androgen Aggravates Aortic Aneurysms Via Suppression Of Pd-1 In Mice, Xufang Mu, Shu Liu, Zhuoran Wang, Kai Jiang, Timothy S. Mcclintock, Arnold Stromberg, Alejandro V. Tezanos, Eugene S. Lee, John A. Curci, Ming C. Gong, Zhenheng Guo
Markey Cancer Center Faculty Publications
Androgen has long been recognized for its pivotal role in the sexual dimorphism of cardiovascular diseases, including aortic aneurysms (AAs), a devastating vascular disease with a higher prevalence and fatality rate in men than in women. However, the mechanism by which androgen mediates AAs is largely unknown. Here, we found that male, not female, mice developed AAs when exposed to aldosterone and high salt (Aldo-salt). We revealed that androgen and androgen receptors (ARs) were crucial for this sexually dimorphic response to Aldo-salt. We identified programmed cell death protein 1 (PD-1), an immune checkpoint, as a key link between androgen and …
Accommodating Innovative Uses Of Public Right Of Way, Travis Thompson, David Moses, Candice Wallace, Pam Clay-Young, Arlen Sandlin
Accommodating Innovative Uses Of Public Right Of Way, Travis Thompson, David Moses, Candice Wallace, Pam Clay-Young, Arlen Sandlin
Kentucky Transportation Center Research Report
State departments of transportation (DOTs) are embracing the use of clean energy and connectivity (CEC) applications along publicly owned right of way (ROW). Applications such as wind and solar power installations, broadband lines, small cell wireless equipment, electric vehicle charging stations, and technologies related to connected and automated vehicles (CAVs) hold considerable promise for conferring environmental benefits, energy savings, and generating much-needed revenue for DOTs. This report explores innovative uses of state-owned ROW that the Kentucky Transportation Cabinet (KYTC) could implement. Although Kentucky may not be currently situated for all clean energy applications, opportunities in solar do currently exist and …
Best Practices For Maintenance Of Traffic On Interstate Pavement Rehabilitation Projects, Catherine Keathley, Ryan Griffith, Rachel Catchings
Best Practices For Maintenance Of Traffic On Interstate Pavement Rehabilitation Projects, Catherine Keathley, Ryan Griffith, Rachel Catchings
Kentucky Transportation Center Research Report
Across the United States, aging roadway infrastructure has led state departments of transportation (DOTs) to increase their focus on pavement rehabilitation projects. These projects upgrade existing infrastructure to meet the needs of current levels of vehicle use. On interstate rehabilitation projects, maintenance of traffic (MOT) is an especially important consideration. Having a good MOT plan for completing construction work is critical for maintaining facility capacity while ensuring the safety of the traveling public and roadway construction staff. This study explores on behalf of the Kentucky Transportation Cabinet (KYTC) best practices for MOT on interstate pavement rehabilitation projects. Based on a …
Using Knowledge Of Human Factors To Strengthen Highway Design, Chris Van Dyke, Jeff Jasper, Jill Asher, Steve Waddle
Using Knowledge Of Human Factors To Strengthen Highway Design, Chris Van Dyke, Jeff Jasper, Jill Asher, Steve Waddle
Kentucky Transportation Center Research Report
Transportation practitioners recognize that leveraging knowledge of human factors in road design is critical for delivering safe mobility to the full spectrum of multimodal road users (motorists, pedestrians, micromobility users, transit users). Understanding how psychology, cognition, and behavioral tendencies shape the ways in which different road users interact with one another and the road environment itself is critical for creating design solutions that promote safe and efficient movement. NCHRP Report 600 (Human Factors Guidelines for Road Systems) provides guidance on integrating knowledge of human factors into design practice. While the report is a valuable resource, it appears to …
Paper_Strategic Workforce Solutions In The Coal Ash Industry- Navigating Talent Challenges For Consultants, Civil Companies, And Utilities, Stuart Keeter
World of Coal Ash Proceedings
"Strategic Workforce Solutions in the Coal Ash Industry: Navigating Talent Challenges for Consultants, Civil Companies, and Utilities" Authors Mr. Stuart Keeter - United States - MRI Raleigh Abstract The pervasive shortage of technical and engineering workers has emerged as a pressing concern for companies grappling with extensive infrastructure projects in the United States. In the September/October 2022 issue of Civil Engineering, ASCE’s 2022 president, Dennis Truax, highlights the urgency, noting the need for approximately 25,000 new civil engineers annually according to the US Bureau of Labor Statistics. As an experienced recruiter specializing in heavy civil, consulting, and utility sectors, I …
Paper_Single-Ended (Blind) Directional Wells For Ash Basin Dewatering, David Bardsley, Dan Ombalski, Brian Shinall, Michael Thornbrue
Paper_Single-Ended (Blind) Directional Wells For Ash Basin Dewatering, David Bardsley, Dan Ombalski, Brian Shinall, Michael Thornbrue
World of Coal Ash Proceedings
SINGLE-ENDED (BLIND) DIRECTIONAL WELLS FOR ASH BASIN DEWATERING Authors Mr. David Bardsley - United States - Ellingson Mr. Dan Ombalski - United States - Ellingson Mr. Brian Shinall - United States - Ellingson Mr. Michael Thornbrue - United States - Atlas Technical Consultants Abstract A power company and their consultant, Atlas Technical Consultants, retained Ellingson-DTD (Ellingson) to install horizontal wells in a partially capped CCR landfill. Ellingson developed and utilized proprietary guidance and well construction technologies to overcome challenges with installing horizontal wells in ash. The technology is based on the ability to navigate casing through a designed curvilinear bore …
Unique, Sustainable, Scalable And Economically Beneficial - Site Remediation & Product Solutions, Maroun Rahme
Unique, Sustainable, Scalable And Economically Beneficial - Site Remediation & Product Solutions, Maroun Rahme
World of Coal Ash Proceedings
Total Ash and Brine Water Waste Utilisation Authors Mr. Maroun Rahme - Australia - Nu-Rock Technology Abstract Nu-Rock’s world-leading and non-cementitious technology's first Ash plant is on Mt. Piper Power Station in Portland NSW converts all ash and brine water generated by a coal fired power station into ‘engineered rock’, which can be used to manufacture superior performing green products such as Building Product Non-cementitious masonry manufacturing means the complete absence of cement in Nu-Rock products. This is a win for the environment and for the building, construction and mining industries. Laboratory tests verify that Nu-Rock’s patented process chemically locks …
Paper_Using Interim Storage To Better Align Harvesting And Beneficiation Timelines, Ethan Bond
Paper_Using Interim Storage To Better Align Harvesting And Beneficiation Timelines, Ethan Bond
World of Coal Ash Proceedings
With environmental sustainability increasing in priority, a number of beneficiation technologies have entered the market since the Coal Combustion Residuals (CCR) Rule took effect. While beneficiation providers offer an attractive solution to the previously regulated and newly regulated units facing closure, the timelines associated with beneficiation are often less attractive considering the strict regulatory deadlines imposed by the CCR Rule. Incorporating environmentally safe interim storage with traditional harvesting and beneficiation offers a potential solution to maintaining regulatory compliance while allowing for sustainable reuse of CCR. In this presentation we’ll explore considerations when looking at interim storage options, outline the various …
Coal Ash Landfill Leachate Systems – Design And Treatment, Christine Harris, Rob Orlando
Coal Ash Landfill Leachate Systems – Design And Treatment, Christine Harris, Rob Orlando
World of Coal Ash Proceedings
Coal Ash Landfill Leachate Systems – Design and Treatment Authors Mrs. Christine Harris - United States - Groundwater Treatment and Technology, LLC (GWTT) Mr. Rob Orlando - United States - Groundwater Treatment and Technology, LLC (GWTT) Abstract Leachate from a coal ash landfill is a highly variable solution which could contain a myriad of constituents as well as varying pH values. The proposed Effluent Limits Guideline limit the discharge of coal ash leachate. This presentation will provide an overview of the design and treatment methods that can be employed to manage this leachate. The first part of the presentation will …
Design, Cqa, And Legacy Rule Considerations For A Multi-Phased Ccp Unit Closure, Brendan Purcell, Brittany Bradley, Jason Obermeyer
Design, Cqa, And Legacy Rule Considerations For A Multi-Phased Ccp Unit Closure, Brendan Purcell, Brittany Bradley, Jason Obermeyer
World of Coal Ash Proceedings
Design, CQA, and Legacy Rule Considerations for a Multi-phased CCP Unit Closure Authors Mr. Brendan Purcell - United States - WSP USA, Inc. Ms. Brittany Bradley - United States - WSP USA, Inc. Mr. Jason Obermeyer - United States - WSP USA, Inc. Abstract This paper presents the case history of an interesting closure certification project at a coal combustion product (CCP) landfill that was progressively closed over a period of more than 30 years as CCPs reached final grades. While progressive closure is recognized as a good management practice, the evolution of an increasingly stringent web of state and …
Navigating Through Geochemical Modeling Uncertainties Related To Site Management And Cleanup Decisions, Scott Hensel
Navigating Through Geochemical Modeling Uncertainties Related To Site Management And Cleanup Decisions, Scott Hensel
World of Coal Ash Proceedings
Navigating through Geochemical Modeling Uncertainties Related to Site Management and Cleanup Decisions Authors Mr. Scott Hensel - United States - Haley & Aldrich Inc. Abstract Geochemical modeling is a common and often essential approach used to understand the fate and transport of many inorganic constituents found at CCR sites. Uncertainties associated with key geochemical parameters may considerably influence the prediction of the fate of a CCR constituent. Because of regulation requirements, many CCR sites are in the process of selecting final remedies, which are often based on geochemical modeling results. Typically, thermodynamic databases downloaded with the program are used to …
Ionic Liquid-Based Extraction And Separation For Recovery Of Rare-Earth Elements From Coal Fly Ash, Ting Liu, Ching-Hua Huang
Ionic Liquid-Based Extraction And Separation For Recovery Of Rare-Earth Elements From Coal Fly Ash, Ting Liu, Ching-Hua Huang
World of Coal Ash Proceedings
Ionic liquid-based extraction and separation for recovery of rare-earth elements from coal fly ash Authors Ms. Ting Liu - United States - Georgia Institute of Technolog Prof. Ching-Hua Huang - United States - Georgia Institute of Technology Abstract Rare-earth elements (REEs) play a critical role in modern technologies. The United States currently lacks domestic REE supply but has a substantial reserve of coal fly ash (CFA) from annual production and decades of accumulation. CFAs are valuable sources for REE recovery, encompassing a comprehensive REE range with some at higher concentrations than rare earth mines. Recent studies from our research group …
Paper_Design, Cqa, And Legacy Rule Considerations For A Multi-Phased Ccp Unit Closure, Brendan Purcell, Brittany Bradley, Jason Obermeyer
Paper_Design, Cqa, And Legacy Rule Considerations For A Multi-Phased Ccp Unit Closure, Brendan Purcell, Brittany Bradley, Jason Obermeyer
World of Coal Ash Proceedings
This paper presents the case history of an interesting closure certification project at a coal combustion product (CCP) landfill that was progressively closed over a period of more than 30 years as CCPs reached final grades. While progressive closure is recognized as a good management practice, the evolution of an increasingly stringent web of state and federal regulations and construction quality assurance (CQA) requirements over the intervening 30 years necessitated retroactive demonstrations to verify compliance with present-day closure requirements. Additionally, earlier-than anticipated plant retirement meant that open areas of the landfill had not yet reached design grades, leaving low areas …
Manage Unexpected Remediation Outcomes In Fractured Bedrock Geological Settings, Rong Yu
Manage Unexpected Remediation Outcomes In Fractured Bedrock Geological Settings, Rong Yu
World of Coal Ash Proceedings
Managing Unexpected Outcomes from Remediation in Fractured Bedrock Geological Settings – How a Revision in the Conceptual Site Model Helped Resolve Unforeseen Conditions Authors Dr. Rong Yu - United States - SynTerra Corporation Abstract To meet groundwater compliance goals established by federal and state regulatory agencies, active groundwater remediation, in addition to source control and monitored natural attention, is often needed. Groundwater extraction is a common hydraulic control measure to achieve plume containment and mass removal. However, in places with complicated geological settings such as fractured bedrock, the hydraulic stress introduced by pumping groundwater can lead to unexpected mobilization of …
Beneficial Reuse Of Fly Ash Harvested From Historic Onsite Sources, Todd Stong, Craig Schuettpelz, Ryan Frank, Shane Stockdill
Beneficial Reuse Of Fly Ash Harvested From Historic Onsite Sources, Todd Stong, Craig Schuettpelz, Ryan Frank, Shane Stockdill
World of Coal Ash Proceedings
Beneficial Reuse of Fly Ash Harvested from Historic Onsite Sources Authors Mr. Todd Stong - United States - WSP USA Mr. Craig Schuettpelz - United States - WSP USA Mr. Ryan Frank - United States - Rainbow Energy Center Mr. Shane Stockdill - United States - Rainbow Energy Center Abstract At many power generation sites, fly ash and other coal combustion residuals (CCRs) have been deposited in previously mined areas, potential “CCR management units” (CCRMUs), or CCR landfills and surface impoundments. The physical properties of these materials may allow them to be beneficially used in applications that meet both regulatory …
Pore Solution-Based Innovative Approach For Evaluating The Effectiveness Of Conventional And Alternative Scms To Mitigate Asr, Anol Mukhopadhyay
Pore Solution-Based Innovative Approach For Evaluating The Effectiveness Of Conventional And Alternative Scms To Mitigate Asr, Anol Mukhopadhyay
World of Coal Ash Proceedings
Pore Solution-Based Innovative Approach for Evaluating the Effectiveness of Conventional and Alternative SCMs to Mitigate ASR Authors Prof. Anol Mukhopadhyay - United States - Texas A&M University Abstract Current ASR tests such as ASTM C 1293 and C 1567 are not sensitive to detecting FA soluble alkali's effect on ASR expansion due to alkali boosting test conditions. Moreover, the current empirical prediction models (e.g., chemical index and extended chemical index) to determine the fly ash dosage for mitigating ASR ignore the role of fly ash soluble alkali contribution on ASR evaluation. The main objective of this study was to develop …
Compressive Strengths Of Various Mortar Mixes Containing Synthetic Lightweight Aggregate, Chris Swan
Compressive Strengths Of Various Mortar Mixes Containing Synthetic Lightweight Aggregate, Chris Swan
World of Coal Ash Proceedings
Compressive Behavior of Various Mortar Mixes Containing Synthetic Lightweight Aggregate Authors Prof. Chris Swan - United States - Tufts University Abstract This paper presents strength and small strain results of mortar concrete mixes, some of which contained synthetic lightweight aggregates (SLAs) – a construction material created from waste plastic and coal fly ash. Twelve mortar mixes were created using a sand-size aggregate that satisfied ASTM’s standard C33 gradation for fine aggregate; i.e., aggregate particles ≤ 4.75mm in size. A 3-by-4 matrix for mix designs was developed; i.e., three different water-to-cement (w/c) ratios of 0.45, 0.55, and 0.65 were used to …
Variable Rate Cone Penetration Testing In Hydraulically Placed Fly Ash Deposits, Andrew Fuggle, Longde Jin, Mark Taylor
Variable Rate Cone Penetration Testing In Hydraulically Placed Fly Ash Deposits, Andrew Fuggle, Longde Jin, Mark Taylor
World of Coal Ash Proceedings
Variable Rate Cone Penetration Testing in Hydraulically Placed Fly Ash Deposits Authors Mr. Andrew Fuggle - United States - WSP USA, Inc. Mr. Longde Jin - United States - WSP USA, Inc. Mr. Mark Taylor - United States - WSP USA, Inc. Abstract Cone Penetration Testing (CPT) is widely used for in-situ characterization of hydraulically placed man-made materials, such as mine tailings and fly ash. These materials are not typical natural soils and are often silt-sized and in a very loose state. Standard methods of interpreting CPT tests developed from either clays or sands are generally inadequate for these materials. …
Critical Mineral Relationships In Global Coal Ash, Denise Levitan
Critical Mineral Relationships In Global Coal Ash, Denise Levitan
World of Coal Ash Proceedings
Critical Mineral Relationships in Global Coal Ash Authors Dr. Denise Levitan - United States - United States Geological Survey Abstract Coal ash can be enriched in critical minerals (as defined by the U.S. Geological Survey’s 2022 list), including rare earth elements (REEs), relative to many other geologic materials. This study compiled literature-reported chemical data from approximately 600 coal-fired power plant ash samples for a meta-analysis. All samples had reported concentration measurements for each of the lanthanides and yttrium (collectively termed REY), but the availability of additional chemical parameters, information about feed coals, and plant specifications varied. Initial analysis of ash …
Electrical Leak Location (Ell) – Case Study, Andrew Colby
Electrical Leak Location (Ell) – Case Study, Andrew Colby
World of Coal Ash Proceedings
Electrical Leak Location (ELL) - Case Study Authors Mr. Andrew Colby - United States - Bunnell Lammons Engineering Abstract ELL technical advancements through experience with trial efforts to evaluate the limits and effectiveness of the technology in an ever-growing industry requiring containment. This presentation will detail a specific project by case study to focus directly upon the issues that face many utility (coal ash) sites throughout the country. A known leak in containment can present many challenges and ELL may be the solution. This case study shows the capabilities and accuracy of the ELL technology used to deal with complicated …
Ash Benefication In Road Construction Materials, Cyril Attwell, Kelley Reynolds-Clausen
Ash Benefication In Road Construction Materials, Cyril Attwell, Kelley Reynolds-Clausen
World of Coal Ash Proceedings
Ash Beneficiation in Road Construction Materials. Authors Mr. Cyril Attwell - South Africa - ARC Innovations Dr. Kelley Reynolds-Clausen - South Africa - Eskom Holdings SOC LTD Abstract Kelley Anne Reynolds-Clausen1 and Cyril N Attwell2 1Eskom Research, Testing and Demonstration, Eskom Holdings SOC Ltd, South Africa. [email protected]. 2ARC Innovations, 83 Bonnyvale Road, .Norton Home Estates, Gauteng, South Africa. [email protected] Keywords: Alkali-activation, coal ash, road construction Road construction traditionally involves the use of virgin material from borrow pits for the development of the base and subbase stabilisation layers. This is often a costly exercise and requires extra management for the project. …