Exploratorium Seawater Cooling Water Intake

Exploratorium Seawater Cooling Water Intake


The Exploratorium is a public learning laboratory located in San Francisco, California that uses cold San Francisco Bay saltwater to meet the majority of the building’s air conditioning needs. Cold saltwater is withdrawn from under the pier-supported Exploratorium and passed through a series of heat exchangers to cool water contained in a closed-loop, cold-water distribution system within the building. After passing through the heat exchanger, saltwater is returned to the bay. The saltwater intake is fitted with two of ISI’s hydraulic-drive, mechanical brush-cleaned wedge wire screens.

Benefit of ISI System

ISI’s screens provide compliance with stringent California and NOAA fish protection requirement through use of 1.75-mm slots openings and a 0.2 fps (6.1 cm/s) approach velocity. The brush cleaning system and anti-fouling coating ensures that the screens remain free from debris and fouling organisms that would otherwise impede operation of the intake or elevate approach velocities.




Power Engineering

General Contractor:

Nibbi Brothers General Contractors


Pacific Ocean, San Fransisco, CA

Year Installed:


Slot Size:

1.75 mm

Screen Model:


Drive System:



Public Education Facility

Water Body:


Flow Rate:

10 cfs (6.5 MGD; 1,019 m3/h)

Screen Type:

Drum Screens (single cylinder)

Retrieval Systems:

Retrievable Vertical Track

Number of Screens:


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