School of Sustainability Graduate Culminating Experiences
Student capstone and applied projects from ASU's School of Sustainability.
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Description
Before the rise in renewable energy, few people considered the consequences of adding large amounts of intermittent power onto the grid. As renewable energy has become more prevalent, utility companies must adapt their business practices to accommodate these unique sources of power. This is leading to challenges on how best to manage a grid with large amounts of renewable power. Arizona Public Service (APS), the largest electricity provider in the state of Arizona, has more than 70,000 distributed solar customers on their grid and the number of solar customers increases every day. With this increase in distributed solar customers comes the solar duck curve—the phenomenon whereby solar produces energy during times of low demand. However, with the use of storage, the duck curve problem may be mitigated. This project examines the sustainability of three storage options: pumped hydro energy storage, compressed air energy storage, and lithium-ion batteries. Using several sustainability indicators, this project makes a policy recommendation to APS on the most sustainable choice for large-scale energy storage. This project found that compressed air energy storage was the most sustainable option for APS. This considered the impacts of compressed air on the environment, communities, and the costs of this storage option. One important aspect to acknowledge regarding this technology is that in its current form, it does emit some carbon emissions. However, the carbon emissions may have less of an impact if this storage facility can allow APS to use its renewable energy assets most efficiently and continue to use energy from Palo Verde, the nuclear facility in Arizona.
ContributorsRood, Devon (Author) / Romito, Marc (Contributor)
Created2018-04-25
Description
This document contains a feasibility study that explores the necessity, collaborations, and
possible methods of installing a 1 megawatt lithium-ion battery storage facility at San Diego Gas
& Electric’s Century Park campus located in the Kearny Mesa neighborhood in central San
Diego, California. The battery will serve purposes of adding renewable energy to the energy mix,
reducing operations costs via peak shaving, an educational component for the region, and
meeting stringent State of California and California Public Utilities Commission mandates for
both renewable energy and battery storage capacity.
possible methods of installing a 1 megawatt lithium-ion battery storage facility at San Diego Gas
& Electric’s Century Park campus located in the Kearny Mesa neighborhood in central San
Diego, California. The battery will serve purposes of adding renewable energy to the energy mix,
reducing operations costs via peak shaving, an educational component for the region, and
meeting stringent State of California and California Public Utilities Commission mandates for
both renewable energy and battery storage capacity.
ContributorsShamblin, Sandra M. (Writer of accompanying material)
Created2020-05-15
Description
"Community and Composting in Victory Acres” implemented a pilot composting program for a local neighborhood in an effort to increase community cohesion. Victory Acres is a low-income, culturally diverse neighborhood located in Tempe that used to have easier access to the Escalante Community Center before the 101 freeway divided the community. Residents of the neighborhoods surrounding ECC do not have access to the Escalante Community Garden except on Community Harvest Days twice a month. The goal of the project was to reconnect broken ties to the ECG through a neighborhood composting service. Through composting, residents could directly benefit from the community garden’s composting capabilities while encouraging a more sustainable method for dealing with food waste. The composting pilot project in Victory Acres was used as a way to mitigate the greenhouse gases emanating from food waste along with other neighborhood issues. The project would encourage aspects of community cohesion, sustainability, and happiness. By the completion of the project, composting in the neighborhood could continue through increased access to the Escalante Community Center Garden. An assessment via survey responses was made on improvements in perceived community connectedness, sustainability, and happiness. The pilot was unsuccessful in gaining a large client base for composting participation, but it was successful in exploring challenges and barriers to implementation of projects in Victory Acres. Several intervention points were explored, several lessons were learned from successful and unsuccessful engagement techniques, and opportunities arose for further future research.
ContributorsKiefer, Alyssa (Author) / Cloutier, Scott (Contributor) / Prosser, Paul (Contributor)
Created2017-04-28
Description
Greenhouse gas (GHG) emissions cause climate change, and if the world does not lower its GHG emissions soon, it will cause irreversible damage that will have overwhelmingly negative cascading effects on the entire planet (Mann & Kump, 2008). Up to 47% of the United States GHG emissions are the result of energy used to produce, process, transport, and dispose of the food we eat and the goods that we consume (US EPA, 2009). The linear-economy status quo does nothing to slow down climate change because it puts resources into landfills. This project promotes a circular economy which combats climate change by reusing resources that are at the end of their life cycle, e.g., food waste soil. The project was a month-long compost competition at an apartment building in Phoenix, AZ that houses 194 residents. The apartment building, Urban Living 2 (UL2), is subsidized housing owned by Native American Connections (NAC), a non-profit organization. The project’s main objective was to increase waste diversion. This was done through composting and improving zero-waste capacity. The compost competition included activities to change community behavior such as private and public commitments, a community barbecue, a movie night (which replaced a planned field trip), and a visioning meeting. By the end of the project, 22% of the tenants were composting. Over a year-long period, this equates to a diversion of, 6000 pounds from the landfill and 1.59 metric tons of Carbon Dioxide equivalent (MTCO2E). The waste diversion increased from 28% to 38%. Tenant participation trended upwards during the project and as the social norm develops over time, more tenant participation is expected even after the competition is over. The six indicators that were used to determine the zero-waste capacity, collectively went up by 1.24 points on a five-point scale. This project will be used as a model for NAC for its other 16 properties in the Valley.
ContributorsVelez, Daniel (Author)
Created2017-04-10