Presenter Information

Lars Krakers, Flowserve Hengelo

Location

Groningen, The Netherlands

Event Website

http://fishpassage.umass.edu/

Start Date

24-6-2015 4:45 PM

End Date

24-6-2015 5:00 PM

Description

Abstract:

The low lying parts of Holland are vulnerable to flooding and are therefore heavily protected by dykes and several pumping stations. These however cause serious obstacles to migratory fish. Pumping stations can be lethal barriers for fish migration. Currently a lot of pump manufacturers are developing new fish friendly pumps. To fit these new pumps in existing pumping stations, usually civil adjustments are required at considerable costs. A more cost effective alternative would be to perform a fish friendly upgrade of the existing pumps.

During the last 3 years Flowserve conducted excessive research to increase their knowledge on fish friendly pump design. This research project led to a comprehensive calculation method to predict survivability rates of fish passing pumps. With this knowledge Flowserve has developed a very cost effective retrofit program to upgrade existing pumping stations equiped with fish unfriendly concrete volute pumps that have open axial flow screw impellers, also known as BVOP pumps. Currently Flowserve has executed several retrofit projects proving fish friendly upgrade possibilities at relatively low costs, lowering the investment threshold to solve fish migration barriers.

The presentation will take you along the developments made the last three years including the full scale in house fish survivability tests performed to validate our developed calculation method. The full scale test involved a total of +/-1800 fish at 7 different operating conditions. Hereafter we will give you insights on two current projects: • A BVOP retrofit project consisting of a new impeller/wear ring combination that fits the existing pumps without civil adjustment requirements. • The upgrade of 2 fully metal, Stork heritage, open axial flow screw impeller, diffuser pumps. To fit the geometrical constraints of these pumps, a new patented fish friendly diffuser-bend combination was developed

Comments

Presenting Author Bio: Born at Hengelo ov in the Netherlands, Studied Aerospace engineering at TU Delft. PhD at TU Delft on multidisciplinary fuselage design of passenger aircraft. Post doc on piezoelectric materials at NIMR-TU Delft. In 2006 started at Flowserve Hengelo as hydraulic engineer. Currently product specialist at Flowserve for water pumps. Last 3 years mainly spent on fish friendly pump design.

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Jun 24th, 4:45 PM Jun 24th, 5:00 PM

Session E9: Incorporating Fish Friendly Solutions in Existing Pumping Stations; An Economical Solution Enabling Fish Migration

Groningen, The Netherlands

Abstract:

The low lying parts of Holland are vulnerable to flooding and are therefore heavily protected by dykes and several pumping stations. These however cause serious obstacles to migratory fish. Pumping stations can be lethal barriers for fish migration. Currently a lot of pump manufacturers are developing new fish friendly pumps. To fit these new pumps in existing pumping stations, usually civil adjustments are required at considerable costs. A more cost effective alternative would be to perform a fish friendly upgrade of the existing pumps.

During the last 3 years Flowserve conducted excessive research to increase their knowledge on fish friendly pump design. This research project led to a comprehensive calculation method to predict survivability rates of fish passing pumps. With this knowledge Flowserve has developed a very cost effective retrofit program to upgrade existing pumping stations equiped with fish unfriendly concrete volute pumps that have open axial flow screw impellers, also known as BVOP pumps. Currently Flowserve has executed several retrofit projects proving fish friendly upgrade possibilities at relatively low costs, lowering the investment threshold to solve fish migration barriers.

The presentation will take you along the developments made the last three years including the full scale in house fish survivability tests performed to validate our developed calculation method. The full scale test involved a total of +/-1800 fish at 7 different operating conditions. Hereafter we will give you insights on two current projects: • A BVOP retrofit project consisting of a new impeller/wear ring combination that fits the existing pumps without civil adjustment requirements. • The upgrade of 2 fully metal, Stork heritage, open axial flow screw impeller, diffuser pumps. To fit the geometrical constraints of these pumps, a new patented fish friendly diffuser-bend combination was developed

https://scholarworks.umass.edu/fishpassage_conference/2015/June24/26