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FISH FRIENDLINESS TPP BROUWERSDAM

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FISH FRIENDLINESS TPP BROUWERSDAM

DR. J. VAN BERKEL

PRO‐TIDE‐NL

ECOLOGY WORKSHOP ISLE OF WIGHT JUNE 30, 2015

Fish Friendly

Turbine options(Specifically for Ultra Low Head Tidal Power, more specifically for the Brouwersdam 4000 m3/s @ 1m)specifically for the Brouwersdam 4000 m3/s @ 1m)

Reopened to improve water quality?

Grevelingen

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Selection and testing of two innovative

Ultra Low Head Tidal Turbines

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Selection done:

1. By an independent advisory board and external experts

2. Analysing Multi Criteria: Costs-Environment-TRL-Perf.-Exportability

Scale 1 : 10 prototype, Nijhuis

Scale 1 : 10 prototype, W2E

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Location: Nuon Vattenfall HPP-Maurik (NL)

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First test: Turbulence level in sink (fish collection) tank

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Soft‐ride Fish injection device

Benchmark Fish (scale model)

Trout, length ~ 18 cmPike-perch, length ~18 cm

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Yellow Eel, length ~ 20 cm Flounders, length 20 cm

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Nervously waiting for the first results: May 12

Majority of the fish uninjured

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30SOME BADLY INJURED

Stand‐in Fish

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41/100 (41 %) broken

23/68 (34 %) damaged

RESULTS :

1. High speed camera recording of fish passing the turbine rotor

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2. Quantitative Fish survival rate

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20 cm Yellow Eels passing safely the propeller turbine at 0,7 m3/s, 175 rpm (blade tipspeed = 4,6 m/s).

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20 cm Yellow Eel struck by a propeller turbine blade at 0,8 m3/s, 190 rpm (blade tip speed = 5 m/s). The Eel survived without damage

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20 cm Trout passing the vertical axis cross-flow turbine at 0,6 m3/s, 75 rpm (blade speed = 2,8 m/s).

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16 cm Bockworst and Carrots passing the propeller turbine at 0,7 m3/s, 175 rpm (blade tipspeed = 4,6 m/s).

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Cradle‐2‐cradle

Quantitative results

&

Model comparison

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Power measurement W2E blade control “A”, 0,94 m3/s 

Blade strike probability

Bladestrike model

Mutilation ratio

Mortality =

x

trout

Van Esch, B.P.M., Spierts, I.L.Y., 2014, Validation of a Model to Predict Fish Passage Mortality in Pumping Stations, Canadian Journal of Fisheries and Aquatic Sciences

Electric Power Research Institute (EPRI), 2011, Fish Passage through Turbines: Application of Conventional Hydropower Data to Hydrokinetic Technologies,Final Technical Report No. 1024638

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Fish friendliness: Propeller turbine

18 cm

Scale 1:16 measured, @ 0,8 m3/s, 0,7 m, 190 rpm

20 cm

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Fish friendliness: Cross-flow turbine

Scale 1:10 measured, @ 0,8 m3/s, 0,4 m, 95 rpm

18 cm 20 cm

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Observations and tentative conclusions:

1. @ 4 % mortality, 100 pcs batch size 95 % confidence interval (Clopper-Pearson method) = 1◄►10 %.

2. Model within 95 % confidence interval of measurements

3. Model predictions for fish mortality of full size devices, at max. operating conditions: indicatively ~ 1 %

4. Less, when incorporating tidal dynamics (to be done).

44Time

Flo

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Bottomline:

Fish friendly operation of TPP Brouwerdam is feasible.

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Thanks!Thanks!Jacob van Berkel

Pro-Tide-NLwww.pro-tide.euentry@xs4all.nl+31 6 228 70 615

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