Design of hydraulic recuperation unit - EPJ Web of Conferences

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Construction must be secured ... Spiral case and runner are made using 3D printing. Spiral .... 3D printing made turbine with these hydraulic parameters. (Fig.

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

1

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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

Abstract.                       !          "   #     $      %& '   #         

     

1 Introduction

2.1 Model of radial turbine

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2 The suggestion of solution )

                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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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)



Figure 6.*             

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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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0,7

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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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              

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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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