Balboa Reservoir Site Development and Geothermal Heat Exchange System
The balboa geothermal project was the first of its kind in San Francisco County. The construction consisted of a closed loop geothermal system which uses the core temperature of the earth to reduce the amount of energy needed in order to supply heating or cooling to the Central Utility Plant at City College of San Francisco. The Central Utility Plant has been designed to handle the heating and cooling needs for the Joint Use Facility and five future buildings on the campus. Four hundred wells were drilled to an elevation 400 feet below original grade to create a closed, pressurized, network of 1 1/4" HDPE pipes. These HDPE pipes were routed to a valve vault which balanced the pressure of the field to make sure that the network of 400 wells operated at the best efficiency; i.e. the most consistant temperature. The water from the wells is routed from the valve vault to the Central Utility Plant outfitted with 15 booster pumps, as well as 3 York heat pumps and 3 York chillers. The heat pumps and chillers regulate the temperature of water used to heat or cool the Joint Use Facility and five future buildings. The five future buildings are ready to receive this service as the Central Utility Plant routes the temperature regulated water in a network of sub-grade, pre-insulated steel pipe. This pipe has been installed and is terminated at four different vaults throughout the campus.
Location
50 Phelan Avenue, San Franciso, CA
Contract No.
105A
Start Date
July 2008
Completion Date
May 2009
Original Contract
$4,789,424
Final Amount
$4,791,029
Owner
San Francisco Community College District
c/o Bovis Lend Lease, Inc.
71 Stevenson Street, Suite 800, San Francisco, CA 94105
Steve Barnes
415-512-0586
Engineer
BKF Engineers
255 Shoreline Drive, Suite 200, Redwood City, CA 94065
50 Phelan Avenue, San Franciso, CA
Contract No.
105A
Start Date
July 2008
Completion Date
May 2009
Original Contract
$4,789,424
Final Amount
$4,791,029
Owner
San Francisco Community College District
c/o Bovis Lend Lease, Inc.
71 Stevenson Street, Suite 800, San Francisco, CA 94105
Steve Barnes
415-512-0586
Engineer
BKF Engineers
255 Shoreline Drive, Suite 200, Redwood City, CA 94065