Embed Size (px)
Citation preview
9/23/2013
1
Low Head Fish Friendly Turbine Design
for
Static and Dynamic Tidal Power
September 2013
FLOW TECHNOLOGIES – FAIRBANKS NIJHUIS
PENTAIR 2
FISH FRIENDLY TIDAL TURBINES
FAIRBANKS NIJHUIS‘ FISH-FRIENDLY TURBINE
• Bi-directional operation
• High efficiency at head differences ranging from 0. 2 – 3 [m]
• Minimal impact on marine life (fish, eel)
• Minimal impact of marine environment (corrosion, fo uling)
• High energy production
• Low manufacturing cost (modular design)
• Low operational cost (maintenance)
• High ratio of yield versus cost for the system
Turbine requirements for low head tidal power
9/23/2013
2
PENTAIR 3
FISH FRIENDLY TIDAL TURBINES
FAIRBANKS NIJHUIS‘ FISH-FRIENDLY TURBINE
Fish collision model
( )[ ] ][14
3 2)sin( −−≈ − δωeQ
Lnp
o
b
PENTAIR 4
FISH FRIENDLY TIDAL TURBINES
FAIRBANKS NIJHUIS‘ FISH-FRIENDLY TURBINE
Example prediction fish mortality
9/23/2013
3
PENTAIR 5
FISH FRIENDLY TIDAL TURBINES
FAIRBANKS NIJHUIS‘ FISH-FRIENDLY TURBINE
First prototype developed by Pentair - Nijhuis
Fish-friendly (patented) turbine
PENTAIR 6
FISH FRIENDLY TIDAL TURBINES
FAIRBANKS NIJHUIS‘ FISH-FRIENDLY TURBINE
Mortality rates eels
Group Control Turbine, guide vane 30°
Turbine, guide vane open
Trial order 3 5 2 4 1 6
N eels recovered after trial 73 63 79 70 80 93
Fraction wild caught eel 0.64 0.73 0.71 0.69 0.70 0.71
Mean length [cm] 42.0 40.7 40.6 40.3 41.3 42.8
Length range (cm) 32-75 31-64 31-76 28-60 31-75 31-84
Direct mortality % 0 % 0 % 0 % 0 % 0 % 0 %
Normal swimming % * 100 % 100 % 100 % 100 % 100 % 100 %
Mortality after 96 h % 1.5 % 0 % 1.2 %
9/23/2013
4
PENTAIR 7
FISH FRIENDLY TIDAL TURBINES
FAIRBANKS NIJHUIS‘ FISH-FRIENDLY TURBINE
Measured performance prototype
PENTAIR
FISH FRIENDLY TIDAL TURBINES
FAIRBANKS NIJHUIS‘ FISH-FRIENDLY TURBINE
Scale model ultra-low head tidal turbine
Design Properties:- Diameter = 0.5 [m]- Head = 1 ± 0.75 [m]- Flow = 1.40 ± 0.8 [m³/s]- Speed = 300 ± 100 [rpm]- Blade angles – fixed- Rotor pitch - ± 180 [degrees]
9/23/2013
5
PENTAIR 9
FISH FRIENDLY TIDAL TURBINES
FAIRBANKS NIJHUIS‘ FISH-FRIENDLY TURBINE
Bi-directional rotor design
PENTAIR 10
FISH FRIENDLY TIDAL TURBINES
FAIRBANKS NIJHUIS‘ FISH-FRIENDLY TURBINE
Expected performance prototype
antconstQHQH ssss =⇒∝ 22 /,
antconstQHNQNH tttt =⇒∝∝ 22 /,,
System characteristic:
Turbine characteristic:
9/23/2013
6
PENTAIR 11
FISH FRIENDLY TIDAL TURBINES
FAIRBANKS NIJHUIS‘ FISH-FRIENDLY TURBINE
Prototype system and turbine
WWW.FAIRBANKSNIJHUIS.COM
FLOW TECHNOLOGIES – FAIRBANKS NIJHUIS
