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Northwest Fisheries Science Center (NWFSC) Environmental and Fisheries Sciences EFS - Fisheries Enhancement and Conservation

Information

Project
Impacts of chiller failure
Title
Impact of chiller failure on the short-term temperature variation in the incubation of salmonids
Description
In salmon recovery programs it is commonly necessary to chill incubation and early rearing temperatures to match wild development times. The most common failure mode for a chiller system is failure of the chiller or circulating pumps. Following chiller failure, the water temperature can rise from 5-7 C to 10-13 C depending on the well temperatures and ambient air temperatures.

The speed and magnitude of the temperature increases depends on how the chillers are designed. The simplest design is a direct-coupled chiller with chilled gas/process water heat exchanger. Other chiller designs include both chilled glycol and water reservoirs. The addition of these reservoirs serves to reduce the maximum rate of temperature change following chiller failure. Increased deformities have been observed in direct-coupled chiller systems for sockeye salmon following chiller failures.

Research Themes

Research Foci

Keywords

None designated

Products

Impact of chiller failure on the short-term temperature variation in the incubation of salmonids
Peer-reviewed article in fisheries or aquaculture journal

Taxa

None assigned

People

Desmond Maynard
Co-Lead
John Colt
Co-Lead