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EPJ Web of Conferences 114, 0 20 51 (2016 ) DOI: 10.1051/epjconf/ 2016 11 4 0 2 0 51 C Owned by the authors, published by EDP Sciences, 2016
Design of hydraulic recuperation unit 1,a
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Pavel Jandourek , Vladimír Habán , Martin Hudec , Lenka Dobšáková and David Štefan
1 Brno University of Technology, Faculty of Mechanical Engineering, Energy Institute, Victor Kaplan Department of Fluid Engineering, Technicka 2896/2, 616 69 Brno, Czech Republic
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1 Introduction
2.1 Model of radial turbine
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Table 1. Design parameters. Design parameters of turbine Head HT
10 m
Turbine flow QT
0.5 l/s
Figure 2.
2.2 Model of axial pump
Design parameters of pump Specific energy Y
13.5 J/kg
Pump flow QP
1 l/s
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Figure 3."
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits distribution, and reproduction in any medium, provided the original work is properly cited.
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2.3 Recuperation unit !
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Figure 4.
Unit flow Q11 (m3/s) Efficiency η (1)
0,3
3 Development and measurement 3.1. Measurement of turbine
0,2 0,15 0,1 Q11
0,05
η
0 0
10
20
30
40
50
60
Unit speed n11 (1/min)
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0,08 0,07
Torque Mk (Nm)
1
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0,25
0,06 0,05 0,04 0,03 0,02 0,01 0 0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
Flow Q (l/s) n = 1000 1/min n = 4000 1/min
Figure 5.
Table 2. Measured quantities at the turbine.
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n = 2000 1/min n = 6000 1/min
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3.2. Measurement of pump 1
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Efficiency η (1)
0,6 0,5 0,4 0,3 0,2 0,1 0 0
0,5
1
1,5
2
Flow Q (l/s)
3 blades
5 blades
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4 blades
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Table 3. Measured quantities at the pump.
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12
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Figure 12. !
20 15 10
Figure 13. ):
5 0 0
0,5
1
1,5
Specific energy Y (J/kg)
Specific energy Y (J/kg)
25
2
Flow Q (l/s) 3 blades
4 blades
5 blades
Design parameters
Figure 10.*
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18 16 14 12 10 8 6 4 2 0
Straight part Rotated, in the straight part Rotated, in the elbow without cross Rotated, in the elbow with cross Design parameters
0
0,5
1
1,5
Flow Q (l/s) Figure 14.*
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Efficiency η (1)
0,5 0,4 0,3 0,2 0,1 0 0
0,5
1
1,5
2
Flow Q (l/s)
Straight part Rotated, in the straight part Rotated, in the elbow without cross Rotated, in the elbow with cross
580 560 540 520 500 480 460 0
0,25
0,5
0,75
1
1,25
Turbine flow QT (l/s) Figure 18.!
Figure 15.*
5 Conclusion
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4 Recuperation unit 3
3 # "
Figure 16.
Pump flow QP (l/s)
Pressure losses Pz (Pa)
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0,6
0,7 0,6 0,5 0,4 0,3 0,2 0,1 0
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