Design of hydraulic recuperation unit
Abstract
Article deals with design and measurement of hydraulic recuperation unit. Recuperation unit consist of radial turbine and axial pump, which are coupled on the same shaft. Speed of shaft with impellers are 6000 1/min. For economic reasons, is design of recuperation unit performed using commercially manufactured propellers.
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Design of hydraulic recuperation unit Pavel Jandourek1,a, Vladimír Habán1, Martin Hudec1, Lenka Dobšáková1 and David Štefan1 1Brno 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 The suggestion of solution ) Table 1. Design parameters. Design parameters of turbine Head HT 10 m Turbine flow QT 0.5 l/s Design parameters of pump Specific energy Y 13.5 J/kg Pump flow QP 1 l/s Figure 1.* 2.1 Model of radial turbine # $+*$ # Figure 2. 2.2 Model of axial pump # )" " , # Figure 3." DOI: 10.1051/ C Owned by the authors, published by EDP Sciences, 201 / 0 0 (201 ) 201 epjconf EPJ Web of Conferences , 1 61 6 6 1 100 4 4 2 2 51 51 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.
-./0 2.3 Recuperation unit ! Figure 4. 3 Development and measurement 3.1. Measurement of turbine 12# ( # ' 3 (#( 3 ' ( . Figure 5. Table 2. Measured quantities at the turbine. . 5 . 6 + & 12 ( 7 . 0 & 1 8 ( ' ( 9 0 : $ $ 6 ; <=# > ; <= Figure 6.* *(12 Figure 7.( %& 3.2. Measurement of pump 1 2# ( # ' "3 (#( 0 0,05 0,1 0,15 0,2 0,25 0,3 0 102030405060 Unit flow Q 11 (m 3 /s) Efficiency η (1) Unit speed n11 (1/min) Q11 η 0 0,01 0,02 0,03 0,04 0,05 0,06 0,07 0,08 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 Torque M k (Nm) Flow Q (l/s) n = 1000 1/min n = 2000 1/min n = 4000 1/min n = 6000 1/min 02051-p.2
-'15 3 ? * " ( " +*# +# Figure 8.+#@ @ Figure 9.) @ Table 3. Measured quantities at the pump. . 5 . 6 + & 12 ( 7 . 0 & Figure 10.* , @ @ Figure 11.* . @ ++ # "# Figure 12. ! ++ Figure 13. ): Figure 14.* 0 5 10 15 20 25 0 0,5 1 1,5 2 Specific energy Y (J/kg) Flow Q (l/s) 3 blades 4 blades 5 blades Design parameters 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0 0,5 1 1,5 2 Efficiency η (1) Flow Q (l/s) 3 blades 4 blades 5 blades 0 2 4 6 8 10 12 14 16 18 0 0,5 1 1,5 2 Specific energy Y (J/kg) Flow Q (l/s) Straight part Rotated, in the straight part Rotated, in the elbow without cross Rotated, in the elbow with cross Design parameters 02051-p.3
-./0 Figure 15.* " @++ 4 Recuperation unit 3 3 # " Figure 16. Figure 17.* * Figure 18.! 5 Conclusion A " " 2 "( ) +* <'%B= )" +* # - +* # ( # ( 'B 2# , +@ & A %%&?#<= +*# +* 1 5@C, " +8@C D # ? # ' B# ? Acknowledgement . ) !-55+5“Rotary machines”. 0 0,1 0,2 0,3 0,4 0,5 0,6 0 0,5 1 1,5 2 Efficiency η (1) Flow Q (l/s) Straight part Rotated, in the straight part Rotated, in the elbow without cross Rotated, in the elbow with cross 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0 0,1 0,2 0,3 0,4 0,5 0,6 Pump flow Q P (l/s) Turbine flow QT(l/s) 460 480 500 520 540 560 580 0 0,25 0,5 0,75 1 1,25 Pressure losses Pz (Pa) Turbine flow QT(l/s) 02051-p.4