The inlet of a centrifugal water pump is 2.3 m above the free surface from which...

 

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The inlet of a centrifugal water pump is 2.3 m above the free surface from which it draws. The inlet consists of 4 m of 5.08 cm schedule-40 steel pipe (inside diameter = 52.50 mm) and contains one long-radius elbow and one check valve. The discharge line is 5 08 cm schedule-40 steel pipe and includes two long-radius elbows and an 27 m nun. The discharge is 6.3 m above the free surface. All components are regular screwed. The water temperature is 21°C (u = 0.9827 x 1o-ª Pa – sec). The following pump curve data are applicable. flow rate head L/s m 37 0.6 36 1.2 35 1.8 34 2.4 33 3.2 31 3.6 29 4.4 26 4.8 22 5.7 17 (a) What is the required operating flow rate? (b) What can be said about the use of this pump in this installation? Do you recommend this pump? Justify your answer. Equivalent Length of Straight Pipe for Various (Generic) Fittings (in feet, turbulent flow only, for any fluid) pipe size (in) fittings 10 12 14 16 18 20 24 14 1% 2 4.4 5.2 6.6 7.4 85 9.3 11.0 13.0 22 3 steel 2.3 3.1 3.6 screwed c.i. eteel langed ci. steel screwed cd. 9.0 11.0 5.9 12.0 14.0 17.0 18.0 21.0 23.0 25.0 30.0 0.92 1.2 1.6 2.1 2.4 3.1 3.6 4.4 7.3 8.9 reg- alar 90°ell 3.0 9.8 12.0 15.0 17.0 19.0 22.0 24.0 28.0 4.8 4.6 7.2 1.5 2.0 2.2 2.3 2.7 3.2 3.4 3.6 3.6 4.0 3.7 3.3 2.7 2.9 3.4 11.0 1.3 1.6 2.0 2.3 4.2 5.0 5.7 7.0 3.0 9.0 9.4 10.0 12.0 14.0 steel 1.1 long radius flanged 90 °ell 2.8 4.7 5.7 6.8 7.8 8.6 9.6 11.0 11.0 13.0 3.4 5.5 c.i. steel 0.34 0.52 0.71 0.92 1.3 1.7 2.1 2.7 3.2 4.0 acrewed ci. steel langed c.t. 3.3 2.6 4.5 3.5 4.5 3.6 7.7 9.0 11.0 13.0 15.0 16.0 18.0 22.0 0.45 0.59 0.81 1.1 1.3 1.7 2.0 reg- ular 6.3 9.7 12.0 13.0 15.0 17.0 20.0 8.1 2.9 17.0 4.5 2.1 1.2 1.7 2.4 3.2 4.6 5.6 7.7 9.3 12.0 45 °eli steel 0.79 scrowed 9.9 2.2 14.0 2.8 c.i. 4.7 5.2 6.0 6.4 7.2 7.6 8.2 9.6 0.69 0.82 1.0 1.3 1.5 1.8 1.9 3.3 3.8 steel fianged c.i. steel screwed c.i. steel branch Hanged c.i. tee- line flow 3.1 3.9 4.6 5.2 5.9 6.5 7.2 T.7 8.8 2.2 21.0 1.9 2.4 3.5 4.2 5.3 6.6 8.7 9.9 12.0 13.0 17.0 14.0 17.0 15.0 18.0 24.0 30.0 34.0 37.0 43.0 47.0 62.0 62.0 2.0 2.6 3.3 4.4 5.2 6.6 7.5 9.4 12.0 tee- 15.0 20.0 25.0 30.0 35.0 39.0 44.0 49.0 57.0 7.7 10.0 13.0 flow steel 2.3 3.1 3.6 4.4 5.2 6.6 7.4 8.5 9.3 11.0 acrewed c.i. 11.0 5.9 9.0 2.4 3.1 3.6 7.3 8.9 12.0 14.0 17.0 18.0 21.0 23.0 25.0 30.0 steel 0.92 1.2 1.6 2.1 4.4 reg- ular flanged c.i. long rosurn radius flanged c.i. 7.2 5.7 9.8 7.0 12.0 8.0 15.0 9.0 17.0 9.4 19.0 22.0 24.0 28.0 10.0 3.8 4.8 4.2 11.0 12.0 14.0 180° steel 1.1 1.3 1.6 2.0 2.3 2.7 2.9 3.4 5.0 5.7 6.8 7.8 8.6 9.8 11.0 11.0 13.0 2.8 steel 21.0 22.0 22.0 24.0 29.0 37.0 42.0 54.0 62.0 79.0 110.0 3.4 4.7 bend scrowed c.i. 65.0 86.0 38.0 40.0 45.0 54.0 50.0 70.0 77.0 94.0 120.0 150.0 190.0 260.0 310.0 300.0 steel globe langed valve 150.0 210.0 270.0 330.0 77.0 99.0 2.5 c. stcel 0.32 0.45 0.56 0.67 0.84 1.1 1.2 1.5 1.7 1.0 screwed c.! 1.6 2.8 2.0 2.9 2.6 2.7 3.1 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 steel gato flangud 3.0 2.1 2.8 2.9 2.9 3.0 3.0 3.0 valve c.i. steel 12.8 15.0 16.0 15.0 17.0 18.0 18.0 18.0 18.0 18.0 18.0 2.3 2.6 2.7 screwed c.i. etel 15.0 15.0 15.0 13.0 17.0 18.0 18.0 21.0 22.0 28.0 38.0 50.0 63.0 90.0 120.0 140.0 160.0 190.0 210.O 240.0 3000 angle valvo, Hanged c.i. steel screwed c.i. steel 23.0 31.0 74.0 98.0 120.0 L50.0 170.0 200.0 230.0 280.0 52.0 7.2 7.3 8.0 8.8 11.0 13.0 15.0 19.0 22.0, 27.0 38.0 22.0 31.0 3.8 5.3 T.2 10.0 12.0 17.0 21.0 27:0 38.0 50.0 63.0 90,0 120.0 140.0 swing check flanged valve čoup- ling or screwed union 22.0 31.0 52.0 74.0 98.0 120.0 c.i. steel 0.14 0.18 0.21 0.24 0.20 0.36 0.39 0.45 0.47 D.33, 0.65 0.44 0.52 c.i. 1.3 1.6 2.9 3.5 4.0 4.7 5.3 7.6 2.3 steel0.04 0.07 0.10 0.13 0.18 0.26 0.31 0.43 0.52 0.67 0:95 The inlet of a centrifugal water pump is 2.3 m above the free surface from which it draws. The inlet consists of 4 m of 5.08 cm schedule-40 steel pipe (inside diameter = 52.50 mm) and contains one long-radius elbow and one check valve. The discharge line is 5 08 cm schedule-40 steel pipe and includes two long-radius elbows and an 27 m nun. The discharge is 6.3 m above the free surface. All components are regular screwed. The water temperature is 21°C (u = 0.9827 x 1o-ª Pa – sec). The following pump curve data are applicable. flow rate head L/s m 37 0.6 36 1.2 35 1.8 34 2.4 33 3.2 31 3.6 29 4.4 26 4.8 22 5.7 17 (a) What is the required operating flow rate? (b) What can be said about the use of this pump in this installation? Do you recommend this pump? Justify your answer. Equivalent Length of Straight Pipe for Various (Generic) Fittings (in feet, turbulent flow only, for any fluid) pipe size (in) fittings 10 12 14 16 18 20 24 14 1% 2 4.4 5.2 6.6 7.4 85 9.3 11.0 13.0 22 3 steel 2.3 3.1 3.6 screwed c.i. eteel langed ci. steel screwed cd. 9.0 11.0 5.9 12.0 14.0 17.0 18.0 21.0 23.0 25.0 30.0 0.92 1.2 1.6 2.1 2.4 3.1 3.6 4.4 7.3 8.9 reg- alar 90°ell 3.0 9.8 12.0 15.0 17.0 19.0 22.0 24.0 28.0 4.8 4.6 7.2 1.5 2.0 2.2 2.3 2.7 3.2 3.4 3.6 3.6 4.0 3.7 3.3 2.7 2.9 3.4 11.0 1.3 1.6 2.0 2.3 4.2 5.0 5.7 7.0 3.0 9.0 9.4 10.0 12.0 14.0 steel 1.1 long radius flanged 90 °ell 2.8 4.7 5.7 6.8 7.8 8.6 9.6 11.0 11.0 13.0 3.4 5.5 c.i. steel 0.34 0.52 0.71 0.92 1.3 1.7 2.1 2.7 3.2 4.0 acrewed ci. steel langed c.t. 3.3 2.6 4.5 3.5 4.5 3.6 7.7 9.0 11.0 13.0 15.0 16.0 18.0 22.0 0.45 0.59 0.81 1.1 1.3 1.7 2.0 reg- ular 6.3 9.7 12.0 13.0 15.0 17.0 20.0 8.1 2.9 17.0 4.5 2.1 1.2 1.7 2.4 3.2 4.6 5.6 7.7 9.3 12.0 45 °eli steel 0.79 scrowed 9.9 2.2 14.0 2.8 c.i. 4.7 5.2 6.0 6.4 7.2 7.6 8.2 9.6 0.69 0.82 1.0 1.3 1.5 1.8 1.9 3.3 3.8 steel fianged c.i. steel screwed c.i. steel branch Hanged c.i. tee- line flow 3.1 3.9 4.6 5.2 5.9 6.5 7.2 T.7 8.8 2.2 21.0 1.9 2.4 3.5 4.2 5.3 6.6 8.7 9.9 12.0 13.0 17.0 14.0 17.0 15.0 18.0 24.0 30.0 34.0 37.0 43.0 47.0 62.0 62.0 2.0 2.6 3.3 4.4 5.2 6.6 7.5 9.4 12.0 tee- 15.0 20.0 25.0 30.0 35.0 39.0 44.0 49.0 57.0 7.7 10.0 13.0 flow steel 2.3 3.1 3.6 4.4 5.2 6.6 7.4 8.5 9.3 11.0 acrewed c.i. 11.0 5.9 9.0 2.4 3.1 3.6 7.3 8.9 12.0 14.0 17.0 18.0 21.0 23.0 25.0 30.0 steel 0.92 1.2 1.6 2.1 4.4 reg- ular flanged c.i. long rosurn radius flanged c.i. 7.2 5.7 9.8 7.0 12.0 8.0 15.0 9.0 17.0 9.4 19.0 22.0 24.0 28.0 10.0 3.8 4.8 4.2 11.0 12.0 14.0 180° steel 1.1 1.3 1.6 2.0 2.3 2.7 2.9 3.4 5.0 5.7 6.8 7.8 8.6 9.8 11.0 11.0 13.0 2.8 steel 21.0 22.0 22.0 24.0 29.0 37.0 42.0 54.0 62.0 79.0 110.0 3.4 4.7 bend scrowed c.i. 65.0 86.0 38.0 40.0 45.0 54.0 50.0 70.0 77.0 94.0 120.0 150.0 190.0 260.0 310.0 300.0 steel globe langed valve 150.0 210.0 270.0 330.0 77.0 99.0 2.5 c. stcel 0.32 0.45 0.56 0.67 0.84 1.1 1.2 1.5 1.7 1.0 screwed c.! 1.6 2.8 2.0 2.9 2.6 2.7 3.1 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 steel gato flangud 3.0 2.1 2.8 2.9 2.9 3.0 3.0 3.0 valve c.i. steel 12.8 15.0 16.0 15.0 17.0 18.0 18.0 18.0 18.0 18.0 18.0 2.3 2.6 2.7 screwed c.i. etel 15.0 15.0 15.0 13.0 17.0 18.0 18.0 21.0 22.0 28.0 38.0 50.0 63.0 90.0 120.0 140.0 160.0 190.0 210.O 240.0 3000 angle valvo, Hanged c.i. steel screwed c.i. steel 23.0 31.0 74.0 98.0 120.0 L50.0 170.0 200.0 230.0 280.0 52.0 7.2 7.3 8.0 8.8 11.0 13.0 15.0 19.0 22.0, 27.0 38.0 22.0 31.0 3.8 5.3 T.2 10.0 12.0 17.0 21.0 27:0 38.0 50.0 63.0 90,0 120.0 140.0 swing check flanged valve čoup- ling or screwed union 22.0 31.0 52.0 74.0 98.0 120.0 c.i. steel 0.14 0.18 0.21 0.24 0.20 0.36 0.39 0.45 0.47 D.33, 0.65 0.44 0.52 c.i. 1.3 1.6 2.9 3.5 4.0 4.7 5.3 7.6 2.3 steel0.04 0.07 0.10 0.13 0.18 0.26 0.31 0.43 0.52 0.67 0:95

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