Sunhusky.png Michigan Tech's Open Sustainability Technology Lab.

Contact Dr. Joshua Pearce now at Free Appropriate Sustainable Technology
MOST: Projects & Publications, Methods, Lit. reviews, People, Sponsors, News
Updates: Twitter, YouTube

Create-Joshua-Pearce.png

Shotcretepv.jpg
Project data
Authors Joshua M. Pearce
Completed 2021
Instance of Photovoltaic system
Export to Open Know How Manifest


Relentless cost declines in solar photovoltaic (PV) modules have radically reduced system costs, but the result is that racking costs have become more important. In this study a new open source racking method using earth and shotcrete-based ground mounts is investigated in two geographic regions: (1) Boa Vista, Brazil, where PV rows have an optimized shallow tilt angle and can be close-packed and (2) Kingston, Canada, where racks can make use of low concentration in the required inter-row spacing. Models are developed for both locations with single, double and triple vertical stacked shotcrete-based ground-mounted PV racking systems. Using these models bills of materials and energy simulations are produced to provide a cost benefit analysis specifically for the shotcrete racks. The results show that for utility-scale PV systems near the equator, a shotcrete racking system could reduce racking costs by 18–22% from the least expensive conventional racking and as much as 47% reduction for more expensive commercial racking. Economics is less clear for shotcrete-based racking at higher latitudes that incorporate low-concentration reflectors as they can be both lower and higher costs than conventional racking, but would be expected to produce at least 18% more electricity per installed Watt. Overall this novel racking concept was found to be promising, particularly for desert regions where it could reduce soiling losses. The results of this study indicate a need for future work to fully evaluate the potential of shotcrete racking to reduce solar electricity costs at the utility scale.

Source


Tctscover.png Create-Joshua-Pearce.png Pearce Publications
FAST
MOST
QAS
Energy Conservation Energy Policy Industrial SymbiosisLife Cycle Analysis Materials Science Open Source Photovoltaic Systems Solar CellsSustainable Development Sustainability Education

OSL.jpg Feedingeveryone.jpg


Highlights[edit | edit source]

  • Open source PV racking to reduce cost in utility scale ground mount systems.
  • Modules fastened to graded land covered in shotcrete with basic mounting hardware.
  • Open source V-shaped design, bill of materials, and cost comparison.
  • Northern latitude with low concentration reflector and equator designs.
  • Racking costs reduced 18–22% at low latitudes.

Keywords[edit | edit source]

Low concentration, Ground mount, Racking, Utility solar, Sustainable development; Open-source; Photovoltaic

See also[edit | edit source]

  1. Open source DIY solar photovoltaic racking