Entries by Anna Adair

Case Study: Winston Cone Optics and Dairy Processing 

Winston Cone Optics’ installed pilot system on the roof of a dairy barn in California. By Anna Adair, NCAT Energy Program Assistant Thanks to the increase of solar photovoltaic sites in recent years, agrivoltaics has started to work its way into the public eye as a means of bridging the gap between land use for […]

Experimental and numerical investigation of the influence of terrain slope on the performance of single-axis trackers

This paper highlights the higher annual solar irradiation incident of single-axis N-S trackers installed on sloping terrain, as compared to horizontal ones. Researchers showcase the results of a year-long experiment in which a N-S aligned single-axis tracker prototype was used in Gijón, Spain. The experimental results confirm the trends in the formulas and simulations. Finally, theoretical values for the energy gain for different slopes, at locations over the northern hemisphere between latitudes of 6◦ and 60◦ are provided. These gains can reach values up to 13.5%.

Solar parks: A review on impacts, mitigation mechanism through agrivoltaics and techno-economic analysis

The current work has a reviewed agrivoltaic projects in India and identified the management practices, constraints, cost econmoics and policy framework. A review of works done on solar park impact assessment and mitigation mechanism by agrivoltaics are done in detail. The work has considered agrivoltaics from a social aspect and focused on impacts due to loss of livelihoods and associated externalities under social impact classification. The social impact assessment concludes that, livelihood impacts can lead to extinction of cultures, urban migrations, growth of uncontrolled peri‑urban regions, the long-term impacts are beyond economics.

Shading Analysis of Agrivoltaic Systems

This study aims to discover how lettuce and potato crops are impacted by the shade of photovoltaic (PV) panels. Four scenarios are considered, with varying parameters such as latitude, azimuth, slope, and row distance between PV modules. The results reveal a significant potential for growing potatoes under PV modules. However, lettuce faces difficulties due to its high requirement for solar intensity (PAR), making it less adaptable to shade. The findings of this study indicate that crops like potatoes, which have a lower requirement for PAR, can be successfully cultivated in conjunction with PV systems.

Grassland Carbon-Water Cycling is Minimally Impacted by a Photovoltaic Array

In this study, researchers used field measurements and a plant hydraulic model to quantify carbon-water cycling in a semi-arid C3 perennial grassland growing beneath a single-axis tracking solar array in Colorado, USA. Although the agrivoltaic array reduced light availability by 38%, net photosynthesis and aboveground net primary productivity were reduced by only 6–7% while evapotranspiration decreased by 1.3%. The minimal changes in carbon-water cycling occurred largely because plant photosynthetic traits underneath the panels changed to take advantage of the dynamic shading environment. The results indicate that agrivoltaic systems can serve as a scalable way to expand solar energy production while maintaining ecosystem function in managed grasslands, especially in climates where water is more limiting than light.

Community Centered Solar Development (CCSD)Case Study Interviews

As part of Berkeley Lab’s Community-Centered Solar Development (CCSD) project, this research set out to explore deep insights and perceptions from large-scale solar (LSS) stakeholders that only qualitative data can provide to identify key factors driving project success or threatened failure. Case studies, such as those utilized in this research, are uniquely adept at capturing the subjective experience of individuals and at identifying variables, structures, and interactions between stakeholders. Our case studies included 54 semi-structured interviews across 7 different LSS sites, representing a diversity of geographies, project sizes (MW), site types (i.e., greenfield, agrivoltaic, and brownfield / contaminated sites), zoning jurisdiction types, and more. In addition to local residents living in close proximity to these LSS sites, we interviewed other key stakeholders involved in the projects such as developers, decision-makers, utility representatives, landowners, and individuals from community-based organizations. The overarching aim of this case study research was two-fold: (1) to inform subsequent tasks in the CCSD research project (including an upcoming national survey of LSS neighbors), and (2) to provide insights into the following set of research questions: -What are the key positive and negative drivers leading to support and opposition to LSS projects? -To what extent do LSS projects exacerbate or mitigate perceived inequities and marginalization within hosting communities and how can those inequities be mitigated going forward? -What strategies can communities employ to align LSS development with local land-use plans and community needs and values? 

Visual Perception and Acceptance of Agrivoltaic in an Eye-Tracking Experiment in Germany

In this study, researchers tested hypotheses on the extent to which varying image content representing different types of
grassland use affects the visual perception and acceptance of agrivoltaics. In the before-and-after comparison, the acceptance of agrivoltaics increased significantly only for grasslands and special crops. The results suggest that attitudes towards agrivoltaics are rather stable and cannot be easily modulated by additional information.

Growing Green Brings Agrivoltaics to Community Gardens in Arizona 

Written for the AgriSolar Clearinghouse by Sarah Bendok, Growing Green  I am a rising sophomore at Phoenix Country Day School. Since I was young, I have always loved gardening. Every summer, I visit my grandma’s village and work in her garden leisurely while observing other farmers in the community tirelessly performing back-breaking labor just to put […]

Case Study: Boulder Housing Partners Triangle Solar Array

The Boulder Housing Partners Triangle Solar Array is one of the first solar arrays in the Boulder, Colorado, area that is solely dedicated to offsetting energy use for low-income residents. The array is a south-facing fixed array with the leading edge of the solar panels about two feet off the ground. Construction was completed in 2021, and the array will generate over 19 GWh of solar energy in the next 10 years.

Reducing Post-Harvest Losses Through the Use of Innovative Solar-Powered Refrigeration Systems 

Written for the AgriSolar Clearinghouse by Ridge to Reefs staff Emma Verlinden, Paul Sturm, and Phal Mantha In 2017, the devastation following Hurricane Maria was catastrophic for countless coastal communities. The archipelago of Puerto Rico experienced mass power loss and severe food-supply shortages, leaving many rural communities without power for extended periods of time (in […]