REPORT BY THE UNIVERSITY OF WASHINGTON ____________________________________________________________________________________________________________ Renewable Energy Options for Golden Gate National Recreation Area at Alcatraz Island May 2008 Prepared for: University National Park Energy Partnership Program and National Park Service Prepared by: Mary H. Hamman, K. Boyd Fackler, and Philip C. Malte Department of Mechanical Engineering University of Washington Seattle, WA 98195-2600 Phone: 206.543.6851 Email:
[email protected] ________________________________________________________________ Renewable Energy Options for Golden Gate National Recreation Area at Alcatraz Island Mary H. Hamman, K. Boyd Fackler, and Philip C. Malte Department of Mechanical Engineering University of Washington Seattle, WA 98195-2600 EXECUTIVE SUMMARY This report is based on the Masters of Science (Mechanical Engineering) Thesis of Ms. Hamman completed in March 2008. Material on electrical details and wiring diagrams and on pumped storage seawater corrosion has been added. The report includes a comprehensive study of the existing energy situation at Alcatraz Island and the renewable energy opportunities available there. Alcatraz Island is part of the Golden Gate National Recreation Area in San Francisco Bay. As the site of one of the most notorious federal prisons, it is a significant piece of this country’s history and a destination for over a million tourists each year. The island is not connected to the San Francisco power grid, and currently energy is provided by 210 kW rated diesel generators, one that operates all day, regardless of the energy demand, and one held as an alternative. The cost of electricity produced by the diesel generators is $0.39/kWh, including fuel, transportation, maintenance and the emissions from the generators.