This collection includes most of the ASU Theses and Dissertations from 2011 to present. ASU Theses and Dissertations are available in downloadable PDF format; however, a small percentage of items are under embargo. Information about the dissertations/theses includes degree information, committee members, an abstract, supporting data or media.

In addition to the electronic theses found in the ASU Digital Repository, ASU Theses and Dissertations can be found in the ASU Library Catalog.

Dissertations and Theses granted by Arizona State University are archived and made available through a joint effort of the ASU Graduate College and the ASU Libraries. For more information or questions about this collection contact or visit the Digital Repository ETD Library Guide or contact the ASU Graduate College at gradformat@asu.edu.

Displaying 1 - 2 of 2
Filtering by

Clear all filters

172011-Thumbnail Image.png
Description
Concerns about the environmental and social impacts of anthropogenic climate change have called into question the efficacy, efficiency, and equity of energy systems. People committed to renewable energy transitions, and those who defend fossil-based systems, are simultaneously envisioning energy futures and seeking to build them. In the process, they are

Concerns about the environmental and social impacts of anthropogenic climate change have called into question the efficacy, efficiency, and equity of energy systems. People committed to renewable energy transitions, and those who defend fossil-based systems, are simultaneously envisioning energy futures and seeking to build them. In the process, they are changing both energy technologies and how social life is organized around them. In this dissertation, I examine how ideas and materialities around distributed solar power become inscribed into energy policies, etched into urban landscapes, and embedded into city life. These processes engender particular kinds of embodied communities, which I define as solar communities. I study the visual and affective dimensions of emerging solar communities in Arizona and Italy using the qualitative methods of semi-structured interviews, photo-documentation, and observation. The dissertation consists of three papers. In Chapter 2, I explore how rooftops are constructed as newly productive sites for electricity generation through economic, legal, cartographic, and political negotiations, and how they become sites of struggle over who has access to them. I describe a case study in Phoenix about a proposed change in compensation for residential rooftop solar customers and the affective dynamics of a protest around it. In Chapter 3, I examine how a variety of photovoltaic applications are appearing in urban landscapes in Treviso, Italy and Flagstaff, Arizona. I investigate how aesthetic and environmental values are imbued in the physical forms those installations ultimately take, and the role that in/visibility plays in shaping these decisions. I use photography to document these emergent solar communities and argue that there is value to seeing photovoltaics in your city. In Chapter 4, I describe a workshop I led on the human dimensions and ethical trade-offs of renewable energy transitions using interactive activities and case studies from Ethiopia and Appalachia. I show how decisions about energy transitions have far-reaching impacts on people’s lives, health, the way they work, and geopolitical relationships. Together, these chapters begin to form a picture of the governance around, and visuality of, photovoltaic designs that emerge as fixtures of both landscape and society, which in turn inform solar communities.
ContributorsFuller, Jennifer Lynn (Author) / Miller, Clark A (Thesis advisor) / Wetmore, Jameson (Committee member) / Graffy, Elisabeth (Committee member) / Arizona State University (Publisher)
Created2022
189218-Thumbnail Image.png
Description
Solar photovoltaic (PV) generation has seen significant growth in 2021, with an increase of around 22% and exceeding 1000 TWh. However, this has also led to reliability and durability issues, particularly potential induced degradation (PID), which can reduce module output by up to 30%. This study uses cell- and module-level

Solar photovoltaic (PV) generation has seen significant growth in 2021, with an increase of around 22% and exceeding 1000 TWh. However, this has also led to reliability and durability issues, particularly potential induced degradation (PID), which can reduce module output by up to 30%. This study uses cell- and module-level analysis to investigate the impact of superstrate, encapsulant, and substrate on PID.The influence of different substrates and encapsulants is studied using one-cell modules, showing that substrates with poor water-blocking properties can worsen PID, and encapsulants with lower volumetric resistance can conduct easily under damp conditions, enabling PID mechanisms (results show maximum degradation of 9%). Applying an anti-soiling coating on the front glass (superstrate) reduces PID by nearly 53%. Typical superstrates have sodium which accelerates the PID process, and therefore, using such coatings can lessen the PID problem. At the module level, the study examines the influence of weakened interface adhesion strengths in traditional Glass-Backsheet (GB) and emerging Glass-Glass (GG) (primarily bifacial modules) constructions. The findings show nearly 64% more power degradation in GG modules than in GB. Moreover, the current methods for detecting PID use new modules, which can give inaccurate information instead of DH-stressed modules for PID testing, as done in this work. A comprehensive PID susceptibility analysis for multiple fresh bifacial constructions shows significant degradation from 20 to 50% in various constructions. The presence of glass as the substrate exacerbates the PID problem due to more ionic activity available from the two glass sides. Recovery experiments are also conducted to understand the extent of the PID issue. Overall, this study identifies, studies, and explains the impact of superstrate, substrate, and encapsulant on the underlying PID mechanisms. Various pre- and post-stress characterization tests, including light and dark current-voltage (I-V) tests, electroluminescence (EL) imaging, infrared (IR) imaging, and UV fluorescence (UVF) imaging, are used to evaluate the findings. This study is significant as it provides insights into the PID issues in solar PV systems, which can help improve their performance and reliability.
ContributorsMahmood, Farrukh ibne (Author) / Tamizhmani, Govindasamy (Thesis advisor) / Rogers, Bradley (Committee member) / Oh, Jaewon (Committee member) / Rajadas, John (Committee member) / Arizona State University (Publisher)
Created2023