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Articles 3751 - 3780 of 5557
Full-Text Articles in Oil, Gas, and Energy
Noble Gases Identify The Mechanisms Of Fugitive Gas Contamination In Drinking-Water Wells Overlying The Marcellus And Barnett Shales, Thomas H. Darrah, Avner Vengosh, Robert B. Jackson, Nathaniel R. R. Warner, Robert J. Poreda
Noble Gases Identify The Mechanisms Of Fugitive Gas Contamination In Drinking-Water Wells Overlying The Marcellus And Barnett Shales, Thomas H. Darrah, Avner Vengosh, Robert B. Jackson, Nathaniel R. R. Warner, Robert J. Poreda
Dartmouth Scholarship
Horizontal drilling and hydraulic fracturing have enhanced energy production but raised concerns about drinking-water contamination and other environmental impacts. Identifying the sources and mechanisms of contamination can help improve the environmental and economic sustainability of shale-gas extraction. We analyzed 113 and 20 samples from drinking-water wells overlying the Marcellus and Barnett Shales, respectively, examining hydrocarbon abundance and isotopic compositions (e.g., C2H6/CH4, δ13C-CH4) and providing, to our knowledge, the first comprehensive analyses of noble gases and their isotopes (e.g., 4He, 20Ne, 36Ar) in groundwater near shale-gas wells. We addressed two questions. (i) Are elevated levels of hydrocarbon gases in …
Damming Brazil, Thyra Brody
Damming Brazil, Thyra Brody
e-Research: A Journal of Undergraduate Work
Hydroelectric power is often considered a safe and clean alternative to the combustion of fossil fuels. Although the consequences to the air and atmosphere are lower, damming large rivers in the jungles of Brazil have a significant impact on indigenous populations and environmental ecosystems. This article examines such fallout and calls out for equity, and social and environmental justice. As the fuel of the last century burns out the hectic scramble for a tenable alternative is becoming an increasingly serious question mark. We would do well for ourselves, and future generations, to try and solve the environmental issues associated with …
An Assessment Of The Energy Generation Potential Of Photovoltaic Systems In Cameroon Using Satellite-Derived Solar Radiation Datasets, Lacour Ayompe, Aidan Duffy
An Assessment Of The Energy Generation Potential Of Photovoltaic Systems In Cameroon Using Satellite-Derived Solar Radiation Datasets, Lacour Ayompe, Aidan Duffy
Articles
Cameroon like most developing countries does not have a reliable network of surface observation stations for collecting weather data. This has been a major drawback for accurate assessment of the energy generation potential of photovoltaic systems in Cameroon. A viable alternative is to obtain site-specific solar irradiation from satellite-derived datasets. In this paper, the energy output, capacity factor and performance ratio of photovoltaic systems in 33 locations spread around ten regions in Cameroon have been evaluated using monthly average daily global horizontal solar irradiation from long-term satellitederived data available in Solar GIS software. An economic assessment revealed that a simple …
An Economic Analysis Of Small-Scale Biodiesel Production: Implementation Of Ethyl Ester Production In A Job Shop Setting, Scott Haase, Benjamin Craig
An Economic Analysis Of Small-Scale Biodiesel Production: Implementation Of Ethyl Ester Production In A Job Shop Setting, Scott Haase, Benjamin Craig
Journal of Undergraduate Research at Minnesota State University, Mankato
Biodiesel is becoming a demanded consumer automotive alternative fuel used in diesel vehicles today. An emerging trend is toward small-scale biodiesel production performed by the final consumer. A limited source of commercially available production systems exists and has resulted in many systems being designed and built by the user. Preliminary research conducted by the authors has shown biodiesel to be the least-cost alternative to petroleum diesel after as few as 8 months of system use. This study examines the economic viability of building and producing biodiesel using a small-scale production system versus buying consumer petroleum diesel. During production, measurements were …
Study On Safety Issues For Lng Tank Container Carried By Sea In China, Yuanjing Xiang
Study On Safety Issues For Lng Tank Container Carried By Sea In China, Yuanjing Xiang
Maritime Safety & Environment Management Dissertations (Dalian)
No abstract provided.
Strategy Of Market-Based Measures (Mbm) To Tackle Green House Gas Missions (Ghg) For International Shipping In China, Jiaqiang Shen
Strategy Of Market-Based Measures (Mbm) To Tackle Green House Gas Missions (Ghg) For International Shipping In China, Jiaqiang Shen
Maritime Safety & Environment Management Dissertations (Dalian)
No abstract provided.
Study On Environmental Risk Assessment Of Oil Spill Accidents In Shanghai Port, Jingzhou Chang
Study On Environmental Risk Assessment Of Oil Spill Accidents In Shanghai Port, Jingzhou Chang
Maritime Safety & Environment Management Dissertations (Dalian)
No abstract provided.
Discussion On Eeoi Reduction Measures Based On Modern Management, Liying Song
Discussion On Eeoi Reduction Measures Based On Modern Management, Liying Song
Maritime Safety & Environment Management Dissertations (Dalian)
No abstract provided.
Forecast And Analysis Of Seaborne Import Oil Freight From South Africa To China, Qingying Xu
Forecast And Analysis Of Seaborne Import Oil Freight From South Africa To China, Qingying Xu
World Maritime University Dissertations
No abstract provided.
Analysis Of Energy-Based Carbon Emission From Landside Operations Of Container Terminal And Its Abatement Strategies, Dwi Astuti
World Maritime University Dissertations
No abstract provided.
The Power Plant Mapping Student Project, Kelsey Tayne, Tom Oda
The Power Plant Mapping Student Project, Kelsey Tayne, Tom Oda
STAR Program Research Presentations
The Power Plant Mapping Student Project: Bringing Citizen Science to Schools
Kelsey Tayne1, Tom Oda2
1STEM Teacher and Researcher (STAR) Fellow, San Francisco State University, San Francisco, CA 94132
2NOAA ESRL, Global Monitoring Division, Boulder, CO 80303
Emissions inventory (EI) is a conventional tool to monitor changes in anthropogenic emissions and can visually show geographical patterns of emission changes. The EI community is aware of significant errors in the geographical locations of point sources, including power plants. The Power Plant Mapping Student Project (PPMSP) is a platform designed for students in 4th through 12 …
Light Pollution Research Through Citizen Science, John Kanemoto
Light Pollution Research Through Citizen Science, John Kanemoto
STAR Program Research Presentations
Light pollution (LP) can disrupt and/or degrade the health of all living things, as well as, their environments. The goal of my research at the NOAO was to check the accuracy of the citizen science LP reporting systems entitled: Globe at Night (GaN), Dark Sky Meter (DSM), and Loss of the Night (LoN). On the GaN webpage, the darkness of the night sky (DotNS) is reported by selecting a magnitude chart. Each magnitude chart has a different density/number of stars around a specific constellation. The greater number of stars implies a darker night sky. Within the DSM iPhone application, a …
Potential And Technological Advancement Of Biofuels, Rajee Olaganathan, Fabian Ko Qui Shen, Lim Jun Shen
Potential And Technological Advancement Of Biofuels, Rajee Olaganathan, Fabian Ko Qui Shen, Lim Jun Shen
Publications
This scientific paper examines the feasibility of biofuels as a solution to the world‟s energy crisis. It studies the development of the four different generations of biofuel that have been discerned over the years, determining the pros and cons of each. The paper further investigates the issues concerning each generation, and determines how their successors have solved and improved on those problems. In order to give the reader an unbiased perspective, the paper studies both general advantages and disadvantages that encompasses social, economic and environmental impacts. Research and development on the first two generations of biofuels have matured, and case …
Development Of A Black-Box Transient Thermal Model For Residential Buildings, Andrew Cross
Development Of A Black-Box Transient Thermal Model For Residential Buildings, Andrew Cross
UNLV Theses, Dissertations, Professional Papers, and Capstones
Heavily populated metropolitan areas located in cooling-dominated climates, as are found in the Desert Southwest, pose a challenge to electrical utilities that service these areas. During the late afternoons of the summer months, residents of these metropolitan areas require larger than normal amounts of power to run their homes' air conditioning systems, at significant expense to the utilities. In the study reported here, interior temperature and power consumption data, accumulated over the course of a year and a half from seven houses within a Las Vegas neighborhood, are used to develop a predictive black-box statistical model for residential thermal transience. …
Power Optimization, Diagnostic Monitoring, And Modeling Of Photovoltaic System, Khalid Hurayb
Power Optimization, Diagnostic Monitoring, And Modeling Of Photovoltaic System, Khalid Hurayb
UNLV Theses, Dissertations, Professional Papers, and Capstones
Photovoltaic (PV) solar energy has been sustaining a major growth rate over the last decade in many parts of the world. This steep growth has been driven by concern about climate change, the adoption of renewable portfolio standards, government incentives, and reduction in PV system costs. Recently, however, such large PV penetration into the electrical grid is cause a concern that might curb such a growth; namely, the incontrollable intermittency of power generated on cloudy days. Furthermore, conventional PV system configurations often do not harness the maximum power that is available under partial shading caused by clouds or shadows of …
Speciation Behavior Of Americium Higher Oxidation States For The Separation Of Americium From Curium, Catherine Lynn Riddle
Speciation Behavior Of Americium Higher Oxidation States For The Separation Of Americium From Curium, Catherine Lynn Riddle
UNLV Theses, Dissertations, Professional Papers, and Capstones
Several countries are currently expanding the use of nuclear energy as a method for the safe generation of carbon free energy and a number are evaluating starting up a nuclear power program. Closed fuel cycle technologies may be key to waste reduction and a sustainable nuclear energy future and to support the development of more efficient fuel cycles, the investigation of the chemical properties of key actinides is at the forefront of separations research. In this work the characterization of higher oxidation states of americium (Am) has been performed using spectroscopic methods. Americium in the formal oxidation state of Am(V) …
A Geospatial Approach For Prioritizing Wind Farm Development In Northeast Nebraska, Usa, Adam Miller, Ruopu Li
A Geospatial Approach For Prioritizing Wind Farm Development In Northeast Nebraska, Usa, Adam Miller, Ruopu Li
School of Natural Resources: Faculty Publications
Being cleaner and climate friendly, wind energy has been increasingly utilized to meet the ever-growing global energy demands. In the State of Nebraska, USA, a wide gap exists between wind resource and actual energy production, and it is imperative to expand the wind energy development. Because of the formidable costs associated with wind energy development, the locations for new wind turbines need to be carefully selected to provide the greatest benefit for a given investment. Geographic Information Systems (GIS) have been widely used to identify the suitable wind farm locations. In this study, a GIS-based multi-criteria approach was developed to …
Organic Fluids And Passive Cooling In A Supercritical Rankine Cycle For Power Generation From Low Grade Heat Sources, Rachana Vidhi
Organic Fluids And Passive Cooling In A Supercritical Rankine Cycle For Power Generation From Low Grade Heat Sources, Rachana Vidhi
USF Tampa Graduate Theses and Dissertations
Low grade heat sources have a large amount of thermal energy content. Due to low temperature, the conventional power generation technologies result in lower efficiency and hence cannot be used. In order to efficiently generate power, alternate methods need to be used. In this study, a supercritical organic Rankine cycle was used for heat source temperatures varying from 125°C to 200°C. Organic refrigerants with zero ozone depletion potential and their mixtures were selected as working fluid for this study while the cooling water temperature was changed from 10-25°C. Operating pressure of the cycle has been optimized for each fluid at …
A Novel Microgrid Demand-Side Management System For Manufacturing Facilities, Terance Jerome Harper
A Novel Microgrid Demand-Side Management System For Manufacturing Facilities, Terance Jerome Harper
Open Access Theses
Thirty-one percent of annual energy consumption in the United States occurs within the industrial sector, where manufacturing processes account for the largest amount of energy consumption and carbon emissions. For this reason, energy efficiency in manufacturing facilities is increasingly important for reducing operating costs and improving profits. Using microgrids to generate local sustainable power should reduce energy consumption from the main utility grid along with energy costs and carbon emissions. Also, microgrids have the potential to serve as reliable energy generators in international locations where the utility grid is often unstable.
For this research, a manufacturing process that had approximately …
Field To Flight: A Techno-Economic Analysis Of Stover To Aviation Biofuels Supply Chain, Amanda C. Bittner
Field To Flight: A Techno-Economic Analysis Of Stover To Aviation Biofuels Supply Chain, Amanda C. Bittner
Open Access Theses
Greenhouse gas emissions have been a growing concern. The transportation sector contributes to one-third of GHG emissions in the United States from fossil fuel burning. The Renewable Fuel Standard set a requirement for 16 billion gallons (ethanol equivalent) of cellulosic biofuels to be used in the market. Aviation biofuels can help to meet both of these problems as well as improve U.S. energy security.
Investment in the biofuel industry carries a lot of risk. The biofuel industry is run by the private sector, but can be incentivized by government. Cellulosic biofuels carry even more risk than first generation biofuels, because …
Catalysts For Portable, Solid State Hydrogen Genration Systems, Jason Robert Gabl
Catalysts For Portable, Solid State Hydrogen Genration Systems, Jason Robert Gabl
Open Access Theses
Hydrogen and air powered proton exchange membrane fuel cells are a potential alternative to batteries. In portable power systems, the design requirements often focus on cost efficiency, energy density, storability, as well as safety. Ammonia borane (AB), a chemical hydride containing 19.6 wt. % hydrogen, has a high hydrogen capacity and is a stable and non-toxic candidate for storing hydrogen in portable systems.
Throughout this work, Department of Energy guidelines for low power portable hydrogen power systems were used as a baseline and comparison with commercially available systems. In order to make this comparison, the system parameters of a system …
High Temperature Flooded Expansion For Solar Thermal Power Generation, Nelson Alexander James
High Temperature Flooded Expansion For Solar Thermal Power Generation, Nelson Alexander James
Open Access Theses
Even though solar power usage has seen rapid growth over the past decade, fossil fuel generation sources are still generally a less expensive means of producing power. The Liquid-Flooded Ericsson Cycle (LFEC) was investigated as a high efficiency power cycle for reducing the cost of concentrated solar power (CSP) plants and helping to address this cost disparity. High temperature flooded expansion was identified as one of the main challenges in regards to utilizing the LFEC as a power cycle. Thermodynamic models were developed to help assess the performance of the LFEC and a load stand was constructed to test a …
A Multi-Period Mixed Integer Linear Programming Model For Desalination And Electricity Co-Generation In Kuwait, Nael Abdulhameed Alqattan
A Multi-Period Mixed Integer Linear Programming Model For Desalination And Electricity Co-Generation In Kuwait, Nael Abdulhameed Alqattan
USF Tampa Graduate Theses and Dissertations
Water is the root of life and the engine that drives agriculture, industry, economy and services. The demand for water often necessitates desalination, particularly in arid coastal environments where there are several desalination technologies in use today such as Multi-Effect Distillation (MED) and Reverse Osmosis (RO). The key utility requirement for technologies such as desalination and population in general include energy in one form or another. Therefore, desalination and co-generation are often integrated. Another key utility is electricity which is generated from either renewable or non-renewable sources. The demands for water and electricity change over time and are subject to …
Slides: What We Know (And Don't Know) About Air Quality Impacts Of Oil And Gas Development, Anna Karion
Slides: What We Know (And Don't Know) About Air Quality Impacts Of Oil And Gas Development, Anna Karion
Water and Air Quality Issues in Oil and Gas Development: The Evolving Framework of Regulation and Management (Martz Summer Conference, June 5-6)
Presenter: Anna Karion, NOAA/ESRL, University of Colorado/CIRES
35 slides
Slides: The Efd Program: Addressing Environmental Issues And Increasing Environmental Awareness, Richard Haut
Slides: The Efd Program: Addressing Environmental Issues And Increasing Environmental Awareness, Richard Haut
Water and Air Quality Issues in Oil and Gas Development: The Evolving Framework of Regulation and Management (Martz Summer Conference, June 5-6)
Presenter: Rich Haut, Houston Advanced Research Center
8 slides
Slides: Details Of The Regulatory Framework: Air Quality Regulation Of Oil And Gas Development, Olivia D. Lucas
Slides: Details Of The Regulatory Framework: Air Quality Regulation Of Oil And Gas Development, Olivia D. Lucas
Water and Air Quality Issues in Oil and Gas Development: The Evolving Framework of Regulation and Management (Martz Summer Conference, June 5-6)
Presenter: Olivia D. Lucas, Esq., Counsel, Faegre Baker Daniels
22 slides
Slides: Regulating Oil And Gas Emissions In The Denver Julesberg Basin, Garry Kaufman
Slides: Regulating Oil And Gas Emissions In The Denver Julesberg Basin, Garry Kaufman
Water and Air Quality Issues in Oil and Gas Development: The Evolving Framework of Regulation and Management (Martz Summer Conference, June 5-6)
Presenter: Garry Kaufman, Deputy Director, Colorado Air Pollution Control Division
25 slides
Slides: The Stronger State Review Process: Draft Air Quality Guideline, Bruce Baizel
Slides: The Stronger State Review Process: Draft Air Quality Guideline, Bruce Baizel
Water and Air Quality Issues in Oil and Gas Development: The Evolving Framework of Regulation and Management (Martz Summer Conference, June 5-6)
Presenter: Bruce Baizel, Chair, STRONGER Board
17 slides
Slides: Colorado Home Rule And Fracking, Richard Collins
Slides: Colorado Home Rule And Fracking, Richard Collins
Water and Air Quality Issues in Oil and Gas Development: The Evolving Framework of Regulation and Management (Martz Summer Conference, June 5-6)
Presenter: Richard Collins, University of Colorado Law School
33 slides
Slides: Exploring New Frameworks Of Regulation: Negotiating Model Regulations, Mark K. Boling
Slides: Exploring New Frameworks Of Regulation: Negotiating Model Regulations, Mark K. Boling
Water and Air Quality Issues in Oil and Gas Development: The Evolving Framework of Regulation and Management (Martz Summer Conference, June 5-6)
Presenter: Mark K. Boling, President, Southwestern Energy
13 slides