REU Luncheon Presentation on Locating UW – CAES: Basics

Gabriel E. Colón Reyes, REU Undergraduate StudentUniversidad de Puerto Rico, MayagüezUniversity of Massachusetts, Amherst

Thursday, July 2nd, 2015

UW – CAES: How it works

• Hydrostor Plant

UW – CAES Potential

• According to First Law of Thermo, the general open system rate balance is:

• For an adiabatic model, this turns into:

• WC – Work input into compressor

• P0 – Atmospheric Pressure• ΔV – Change in Volume• ϒ – Specific Heat Ratio (CP/CV)

• β – Pressure Ratio (P/P0)• Presents Energy Storage Capacity as a

Function of Depth

Putting it into Context

• Avg household consumes 1.26 kWhr/hr• 23 TWhr = 18 billion homes for one hour = 750

million homes for one day = 2 million homes for a year!!!!!!!

• GoM has 110 TWhr potential = Running entire US Load for 10 days

Location Parameters

• Environmental• Social• Engineering

Environmental Parameters

• Fish Habitat• Fish Nurseries• Fish Spawning Areas• Whale Migration Patterns

Social Parameters

• Emergency Service Lanes• Commercial Boat Lanes• Fishing Areas• Recreational Uses

Engineering Parameters

• Storage Potential• Staging Port Proximity• Distance to Wind Energy Area• Distance to Substation• Soil Structure• UW Terrain Slope

Methodology

• Apply Layers• Weigh Each Parameter• Determine Location

Example

• Marine Cadastre• 2011 Vessel Density: Fishing• Critical Habitat Designations• Ports• Bathymetric Contours

References

• http://millicentmedia.com/2012/09/11/cutting-costs-for-offshore-wind-farms/

• http://www.arcternventures.com/portfolio/hydrostor/

• “Evaluating the Underwater Compressed Air Energy Storage in the Gulf of Maine”, Carson Pete, Presentation and Research Paper

• http://www.eia.gov/tools/faqs/faq.cfm?id=97&t=3

THANK YOU FOR YOUR ATTENTION!!!

Questions????