Digital Commons Network^™

Blocking Out The Sun: Restricting Rooftop Solar In Atlanta, Georgia, Carys Behnke

Geosciences Theses

This study examines the uneven geographies of residential rooftop solar energy adoption across the City of Atlanta. Rooftop solar has the potential to reduce the racial wealth gap, advance economic independence for low-income households, and decrease utility bills. However, research in cities nationwide has consistently shown a marked discrepancy in rooftop solar adoption between white and minority neighborhoods. In Atlanta, analysis of solar permit applications and demographic data shows that 64% of solar installation permits are in majority-white census tracts, though the majority of permits have been located in majority-Black neighborhoods over the last two years. While rapidly increasing adoption …

A Retrospective On 2022 Cyber Incidents In The Wind Energy Sector And Building Future Cyber Resilience, Megan Egan

Cyber Operations and Resilience Program Graduate Projects

Between February and June 2022, multiple wind energy sector companies were hit by cyber-attacks impacting their ability to monitor and control wind turbines. With projected growth in the United States of 110.66 GW from 2020 to 2030, wind energy will increasingly be a critical source of electricity for the United States and an increasingly valuable target for cyberattacks. This paper shows the importance of redundant remote communications, secure third-party providers, and improving response and recovery processes that would ensure this growth period fulfills its potential as a unique opportunity to build in cyber resilience from the outset of new installations …

Scaling Investment In Renewable Energy: Roadblocks And Drivers – Executive Summary, Mithatcan Aydos, Perrine Toledano, Martin Dietrich Brauch, Ladan Mehranvar, Theodoros Iliopoulos, Sunayana Sasmal

Columbia Center on Sustainable Investment

The zero-carbon energy transition is the solution to the 2022 energy crisis and a fundamental part of the solution to the global climate crisis. Yet, there are relatively low levels of investment in renewable energy in developing countries, hindering their achievement of the Sustainable Development Goals (SDGs) and contribution to the Paris Agreement goals.

In 2021, the Asia–Pacific region (excluding China) accounted for less than 8% of investments in energy transition technologies, Latin America and the Caribbean for less than 4%, and Africa and the Middle East for less than 2%. Annual investment in zero-carbon energy in developing economies other …

Scaling Investment In Renewable Energy Generation To Achieve Sustainable Development Goals 7 (Affordable And Clean Energy) And 13 (Climate Action) And The Paris Agreement: Roadblocks And Drivers, Mithatcan Aydos, Perrine Toledano, Martin Dietrich Brauch, Ladan Mehranvar, Theodoros Iliopoulos, Sunayana Sasmal

Columbia Center on Sustainable Investment

The zero-carbon energy transition is the solution to the 2022 energy crisis and a fundamental part of the solution to the global climate crisis. Yet, there are relatively low levels of investment in renewable energy in developing countries, hindering their achievement of the Sustainable Development Goals (SDGs) and contribution to the Paris Agreement goals.

In 2021, the Asia–Pacific region (excluding China) accounted for less than 8% of investments in energy transition technologies, Latin America and the Caribbean for less than 4%, and Africa and the Middle East for less than 2%. Annual investment in zero-carbon energy in developing economies other …

The Role Of Investment Treaties And Investor–State Dispute Settlement (Isds) In Renewable Energy Investments, Ladan Mehranvar, Sunayana Sasmal

Columbia Center on Sustainable Investment

Achieving our global goals of universal access to clean energy and averting a climate crisis will require a mass scale-up of investments in renewable energy infrastructure, redirecting capital from carbon intensive energy and transport systems. The International Renewable Energy Agency estimates that the transformation of the energy system alone will need cumulative investments to reach USD 110 trillion by 2050 to keep the rise in global temperatures to well below 2°C and towards 1.5°C during this century. Of that amount, over 80% will need to be invested in renewables, energy efficiency, end-use electrification, and power grids and flexibility.

The private …

What Ukraine Taught Nato About Hybrid Warfare, Sarah J. Lohmann, Chuck Benson, Vytautas Butrimas, Georgios Giannoulis, Gabriel Raicu, Michael Bervell, Milagro Castilleja, Chris Clyde, Christopher J. Eaton, Alex Elmore, Ryan Fisk, Erin Hodges, Frank J. Kuzminski, Vishwa Padigepati, Caitlin Quirk, Brenton M. Riddle, Shuo Zhang, Lucas Cox, Samira Oakes

Monographs & Collaborative Studies

Russia’s invasion of Ukraine in 2022 forced the United States and its NATO partners to be confronted with the impact of hybrid warfare far beyond the battlefield. Targeting Europe’s energy security, Russia’s malign influence campaigns and malicious cyber intrusions are affecting global gas prices, driving up food costs, disrupting supply chains and grids, and testing US and Allied military mobility. This study examines how hybrid warfare is being used by NATO’s adversaries, what vulnerabilities in energy security exist across the Alliance, and what mitigation strategies are available to the member states.

Cyberattacks targeting the renewable energy landscape during Europe’s green …

Pretreatment Of Corncob With Green Deep Eutectic Solvent To Enhance Cellulose Accessibility For Energy And Fuel Applications, Sanphawat Phromphithak, Nakorn Tippayawong, Thossaporn Onsree, Jochen A. Lauterbach

Faculty Publications

Fossil fuels are the primary source of energy for a long period in spite of excessive environmental hazards, such as greenhouse gas emissions. Production of energy and fuel from lignocellulosic biomass has been the goal of the study in pursuit of renewable alternatives to fossil materials. Corncob is common agricultural biomass waste found in many countries. It can be utilized to produce bioenergy, but the conversion efficiency is limited. Pretreatment may be applied to improve the efficiency of corncob conversion; for example, by the fractionation of lignocellulosic biomass. Choline chloride (ChCl) and glycerol are considered as synthetic deep eutectic solvents …

Lessons From European Energy Transition: Reality Or Green Dream?, Sky Berry-Weiss

Claremont-UC Undergraduate Research Conference on the European Union

As a looming climate crisis continues to overwhelm the global community and Europe grips with fluctuating fossil fuel prices due to geopolitical tensions, the European Union appears to be rushing to forge a path to renewable energy to forgo dependence on nonrenewable energy sources. Decades ahead of the global community, the European Union has succeeded in its 2020 goals by increasing the share of renewable energy to 20% of overall consumption. Heading towards their strikingly ambitious goals for 2030, this great transition provides a case study that other states should be watching closely. This article analyzes the effects of several …

Injustice Within Renewable Energy Life Cycles: Can Irena Offer A Solution?, G. Webster Ross

IdeaFest: Interdisciplinary Journal of Creative Works and Research from Cal Poly Humboldt

This paper explores case studies of green colonialism, supply chain injustices, and poor e-waste management within renewable energy life cycles, and investigates how the International Renewable Energy Agency (IRENA) may be the best suited organization to address and mitigate these issues on a global scale. While renewable energy technology is often heralded as the key to a sustainable future, the life cycle of these technologies is riddled with human rights violations and other injustices. To begin with, many of the minerals required for assembling the hardware are mined in unregulated environments, resulting in several injustices such as health and safety …

News And Notes

Appalachia

No abstract provided.

Teaching Energy Economics In The Gcc: A Synergistic Approach Between Engineering And Economics, Yishu Zhou, Joseph D. Smith, Gregory M. Gelles

Economics Faculty Research & Creative Works

Issues related to safe and abundant energy production have been prominent in recent years. This is particularly true when society considers how to increase the quality of life by providing low-cost energy to citizens. A significant concern of the Gulf Cooperation Council (GCC) relates to the environmental effects of energy production and energy use associated with climate change. Efforts to reduce fossil fuel use and increase the use of renewable energy, together with the price volatility of fossil fuels, have seriously impacted the economics of many oil-producing countries, particularly the Gulf States, which has led to efforts to make their …

Renewable Energy And The Wto: The Limits Of Government Intervention, James J. Nedumpara

Indian Journal of Law and Technology

This paper examines the role of the government in designing and supporting renewable energy programs and the compatibility of such interventions with various covered agreements of the World Trade Organisation (‘WTO’). The WTO treaty does not provide a special framework for renewable energy and a number of programs are susceptible to WTO challenges and domestic trade contingency measures. Of particular interest to developing countries such as India will be the availability of necessary policy space in fostering various renewable energy programs. This paper discusses the current treaty provisions of the WTO, especially the Agreement on Subsidies and Countervailing Measures (‘SCM …

The Role Of Expropriation Clauses In Protection And Promotion Of Foreign Investments In Renewable Energy: An Essential But Overlooked Legal Consideration, Moosa Akefi Ghaziani, Mohammad Akefi Ghaziani

Indonesia Law Review

Today the world is tackling climate change. The global threat of energy poverty along with the growing need for energy has escalated this crisis. The promotion of renewable energy sources is widely known as the main solution to this challenge. Many International and regional agreements address various aspects of renewable energy development such as trade, transit, security, and investment. Since not all states have the financial and technological abilities to develop this sector, foreign investment is recognised as a crucial prerequisite for the global deployment of renewable energies. Various investment agreements are signed to facilitate and promote investments. These instruments …

Most Favoured Nation Clause: Unleashing Its Legal Potential In Favour Of Foreign Investors In Renewable Energy Sector, Mohammad Akefi Ghaziani, Vahid Akefi Ghaziani, Moosa Akefi Ghaziani Dr.

Indonesia Law Review

International Investment Law and other international legal systems, such as trade law and environmental law have interactions and dynamic interrelationships in meeting global challenges including energy security, climate change, and the need for the renewable energy transition. They help in delivering the principles of justice in the context of changing global values and legal practices. Accordingly, they have a potential share in the global climate change mitigation agenda through innovative policies and regulations, inter alia, to facilitate and promote foreign investment and trade in the renewable energy sector. Similarly, these systems have common principles in their respective agreements. The Most-Favoured …

Limited Rigor In Studies Of Raptor Mortality And Mitigation At Wind Power Facilities, Tara J. Conkling, Christopher J.W. Mcclure, Sandra Cuadros, Scott R. Loss, Todd E. Katzner

United States Geological Survey: Staff Publications

Wind power is an expanding source of renewable energy. However, there are ecological challenges related to wind energy generation, including collisions of wildlife with turbines. Lack of rigor, and variation in study design, together limit efforts to understand the broad-scale effects of wind power infrastructure on wildlife populations. It is not clear, however, whether these types of limitations apply to groups of birds such as raptors that are particularly vulnerable to negative effects of wind energy. We reviewed 672 peer-reviewed publications, unpublished reports, and citations from 321 wind facilities in 12 countries to evaluate methods used to monitor and mitigate …

Mediating Role Of Leadership-Led Change In Adoption Of Waste-To-Energy In Nigeria, Jahan Moghadam, Karen Loch, Kamran Khan Niazi

Engaged Management ReView

The use of renewable energy has increased in the past several years. Innovative forms of sustainable alternative energy production, such as solar and wind, are well-recognized energy sources. This paper reviews waste-to-energy (WtE), an innovative and evolving form of renewable energy, and its possible adoption in Nigeria to address this nation’s energy crisis and pollution problem. The theoretical framework of this paper draws from the theory of reasoned action (TRA) and the leadership-led change framework to consider the role of leaders and their influence to adopt WtE. Four factors act as antecedents to the formation of attitudes and subjective norms …

Comparison Of Predicted And Measured Annual Performance Of A Roof-Top Grid-Connected Pv System In The Irish Climate, Chibuisi Chinasaokwu Okorieimoh, Brian Norton Prof, Michael Conlon Prof

Conference Papers

The problem of energy scarcity has reached a global scale as a result of the majority of energy production relying on non-renewable sources of energy. Solar photovoltaic cells use the photovoltaic effect to convert solar energy into electrical energy. Solar energy can reduce emissions of carbon dioxide (CO₂) associated with the generation from fossil fuels as the only CO₂ emissions are those embodied in their manufacture. A 268.8 m² area roof-top grid-connected PV system with a total capacity of 49.92kW_p was installed at Warrenpoint (54.11^oN and 6.26^oW) in Ireland. 192 “Renesola” …

Union County Solar Energy Awareness, Amanda Pennett

Student Project Reports

No abstract provided.

Lifetime Maximization In Underwater Wireless Communication Networks, Kazi Yasin Islam, Iftekhar Ahmad, Daryoush Habibi, Jiong Jin, Muhammad Waqas

Research outputs 2022 to 2026

The rise in demand for underwater wireless communication networks (UWCN) has been driven by the emergence of new applications including unmanned underwater vehicles, deep-sea exploration, maritime and underwater archaeology research, and diver communications. For various applications, underwater network lifetime must be long, since unlike terrestrial sensor networks, it is a major job to change/recharge node batteries in underwater environments. In this paper, we introduce a solution where critical nodes in a UWCN are periodically recharged by small renewable energy sources. Further, a caching mechanism is introduced to relieve critical nodes of heavy workload when their residual energies run low. By …

Advances In Energy Hybridization For Resilient Supply: A Sustainable Approach To The Growing World Demand, Haider Al-Rubaye, Joseph D. Smith, Mohammed H.S. Zangana, Prashant Nagapurkar, Yishu Zhou, Gregory M. Gelles

Chemical and Biochemical Engineering Faculty Research & Creative Works

Energy poverty, defined as a lack of access to reliable electricity and reliance on traditional biomass resources for cooking, affects over a billion people daily. The World Health Organization estimates that household air pollution from inefficient stoves causes more premature deaths than malaria, tuberculosis, and HIV/AIDS. Increasing demand for energy has led to dramatic increases in emissions. The need for reliable electricity and limiting emissions drives research on Resilient Hybrid Energy Systems (RHESs), which provide cleaner energy through combining wind, solar, and biomass energy with traditional fossil energy, increasing production efficiency and reliability and reducing generating costs and emissions. Microgrids …

Z-Source-Based High Step-Up Dc-Dc Converters For Photovoltaic Applications, Ramin Rahimi, Saeed Habibi, Mehdi Ferdowsi, Pourya Shamsi

Electrical and Computer Engineering Faculty Research & Creative Works

This article proposes three high step-up Z-source (ZS)-based dc-dc converters by integrating the conventional ZS network with switched-capacitor (SC) cells. The proposed converters offer a simple structure with a smooth input current, a high-voltage gain, and low voltage stress on the semiconductor devices. In addition, the proposed converters, unlike some existing ZS-based topologies in the literature, do not impose any limitation on the duty cycle of the power switch. These characteristics make the proposed converters excellent candidates to interface a low-voltage solar photovoltaic (PV) panel with a high-voltage dc bus in PV applications. Among the proposed three converters, the operating …

Optimization Of Solar-Coal Hybridization For Low Solar Augmentation, Aaron T. Bame, Joseph Furner, Ian Hoag, Kasra Mohammadi, Kody Powell, Brian D. Iverson

Faculty Publications

This work presents a process to determine the preliminary optimal configuration of a concentrating solar power-coal hybrid power plant with low solar augmentation, and is demonstrated on a regenerative steam Rankine cycle coal power plant in Castle Dale, UT, USA (average DNI of 542 W m⁻²). A representative plant model is developed and validated against published data for a coal power plant. The simplifications that lead to the representative model from a coal power plant model include combining multiple feedwater heaters, combining turbines, and using a mass-average calculation for extraction steam properties. Comparing net power generation and boiler …

A Customer Agnostic Machine Learning Based Peak Electric Load Days Forecasting Methodology For Consumers With And Without Renewable Electricity Generation, Omar Aponte

Theses

The adoption of electricity generation from renewable sources, as well as the push for a speedy electrification of sectors such as transportation and buildings, makes peak electric load management an essential aspect to ensure the electric grid’s reliability and safety. Utilities have established peak load charges that can amount to up to 70% of electricity costs to transfer the financial burden of managing these loads to the consumers. These pricing schemes have created a need for efficient peak electric load management strategies that consumers can implement in order to reduce the financial impact of this type of load. Research has …

Modeling And Analysis Of A 12kw Solar-Wind Hybrid Renewable Energy System, Ekaterina Muravleva

Department of Electrical and Computer Engineering: Dissertations, Theses, and Student Research

The increase in rate of depletion of natural resources in the last decade as well as the increased global focus on climate change has made the transition to renewable resources of energy a priority for various countries and organizations across the globe. The sporadic nature of energy generated by photovoltaic systems and wind energy conversion systems has led to an increased utilization of more reliable hybrid renewable energy systems. A combination of both solar and wind energy-based power generations systems reduces the impact of seasonal variation on the amount of power generated and therefore, can be used under varying weather …

High Hybrid Power Converter Performance Using Modern‐Optimization‐Methods‐Based Pwm Strategy, Khaled Nusair, Feras Alasali, William Holderbaum, Arangarajan Vinayagam, Asma Aziz

Research outputs 2022 to 2026

Recently, interest in DC networks and converters has increased due to the high number of applications in renewable energy systems. Consequently, the importance of improving the efficiency of the hybrid converters has been highlighted. An optimal control strategy is a significant solution to handle the challenges of controlling the hybrid interleaved boost–Cuk converter. In this article, a modern‐optimization‐methods‐based PWM strategy for a hybrid power converter is developed. In order to improve the performance of the hybrid converter, four modern optimization algorithms—namely, Manta ray foraging optimization (MRFO), Marine Predators Algorithm (MPA), Jellyfish Search Optimizer (JS), and Equilibrium Optimizer (EO)—are employed to …

Frequency Event Detection And Mitigation In Power Systems: A Systematic Literature Review, Umar Farooq, Robert B. Bass

Electrical and Computer Engineering Faculty Publications and Presentations

Modern power systems characterized by complex topologies require accurate situational awareness to maintain an adequate level of reliability. Since they are large and spread over wide geographical areas, it is inevitable that failures will occur. Various generation and transmission disturbances, such as generator and transmission line tripping and load disconnection, give rise to a mismatch between generation and demand, which manifest as frequency events. These events can take the form of negligible frequency deviations or more severe emergencies that can precipitate cascading outages, depending on the severity of the disturbance and efficacy of remedial action schema. The impacts of such …

Offshore Speculation: Generative Ethics For Submerged Lands, Leigh Miller

Masters Theses

Where is the line between land and sea? As the United States begins to extend renewable energy infrastructures offshore, it will fundamentally blur the boundary between submerged and visible lands. In communities unfamiliar with landscapes of extraction and generation, the realities of this emerging industry will challenge notions of ownership, aesthetic values, and environmental ethics.

Offshore Speculation opens a dialogue between the discipline of landscape architecture and the spatial politics that support the nation’s transition away from fossil fuels. Reimagining the sea as a new urban territory on submerged land allows honest interrogation of the land-sea binary. Because landscape architects …

Channeling Influence On Noise And Aerodynamic Performance Of Naca 0012 Airfoil As A Possible Solution Of Wind Turbines Noise, Hussein Khudhayer Mohammad

Dissertations

This work numerically and experimentally investigates the effect of using channels inside airfoils on the noise level as a possible resolution for aerodynamic noise generated by wind turbines. The work also investigates aerodynamic performance and turbulence around the employed airfoils. The results reveal that some of the samples show some improvement in reducing the aerodynamic noise. The reduction of the aerodynamic noise is explained as the trailing edge blowing injection that reduces the wake momentum deficit of the blade and reduces the pressure fluctuation which is responsible for noise production. Particularly, the angles of channel inclination with respect to the …

Cooperation Or Competition With China: Interest Groups And Us Policy On Climate Change, Lucia G. Green-Weiskel

Dissertations, Theses, and Capstone Projects

This dissertation analyzes the existence of two constellations of political forces, emphasizing their relationship to each other and the link between their interests related to China and climate change. It argues that two China-related alignments on climate issues are driven by their opposing approaches to US China relations in general in such a way that the latter predicts the former. These broad but opposing coalitions of political forces—one favoring and one opposing cooperation with China—are made up of think tanks, NGOs and industry groups, which have demonstrated a convergence in policy preferences over the course of two presidential administrations, democrat …

Sustainable Rural Development: Is It Possible To Boost Rural Economies While Protecting The Environment?, Jack M. Hempleman

Undergraduate Theses, Capstones, and Recitals

Amidst rapid depletion of our carbon budget, the need to change our practices to be more in line with Earth’s limits has become important in every sector of our economy. From advances in renewable energy generation to the growth of urban gardening, people around the world are taking action to change the way they interact with our planet. However, growing concerns have been raised that protections for the environment will disproportionately harm struggling communities. For instance, rural communities in the United States already exhibit disproportionately high poverty rates, income inequality, and unemployment, as well as lower quality healthcare and public …