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Compute the resulting pressure in kPa after a "real" diffuser in which the energy loss due to sudden enlargement is considered for the flow of water at 25°C from a 36 mm OD x 2.0 mm wall copper tube to an 85 mm OD x 2.5 mm wall copper tube, the pipes are the same elevation. The volume flow rate is 150 L/min and the pressure before the enlargement is 505.823 kPa. NB: OD = Outside Diameter, Wall refers to the pipe's thickness (t) Hints: • Obtain the specific weight of water for the given temperature from Appendix A (Table A.1). • Obtain the resistance coefficient (K) for sudden enlargement from Table 10.3B in chapter 10.

Compute the resulting pressure in kPa after a "real" diffuser in which the energy loss due to sudden enlargement is considered for the flow of water at 25°C from a 36 mm OD x 2.0 mm wall copper tube to an 85 mm OD x 2.5 mm wall copper tube, the pipes are the same elevation. The volume flow rate is 150 L/min and the pressure before the enlargement is 505.823 kPa. NB: OD = Outside Diameter, Wall refers to the pipe's thickness (t) Hints: • Obtain the specific weight of water for the given temperature from Appendix A (Table A.1). • Obtain the resistance coefficient (K) for sudden enlargement from Table 10.3B in chapter 10.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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Compute the resulting pressure in kPa after a "real" diffuser in which the energy loss due to sudden enlargement is considered for the flow of water at 25°C from a 36 mm OD x 2.0 mm wall copper tube to an 85 mm OD x 2.5 mm wall copper tube, the pipes are the same elevation. The volume flow rate is 150 L/min and the pressure before the enlargement is 505.823 kPa. NB: OD = Outside Diameter, Wall refers to the pipe's thickness (t) Hints: • Obtain the specific weight of water for the given temperature from Appendix A (Table A.1). • Obtain the resistance coefficient (K) for sudden enlargement from Table 10.3B in chapter 10. Instructions: Only express the areas in scientific notation to three decimal places but round off to three decimal places in normal number format where necessary throughout your calculations leading to the final answer and including the final answer for all other computations excluding the area.
Transcribed Image Text:Compute the resulting pressure in kPa after a "real" diffuser in which the energy loss due to sudden enlargement is considered for the flow of water at 25°C from a 36 mm OD x 2.0 mm wall copper tube to an 85 mm OD x 2.5 mm wall copper tube, the pipes are the same elevation. The volume flow rate is 150 L/min and the pressure before the enlargement is 505.823 kPa. NB: OD = Outside Diameter, Wall refers to the pipe's thickness (t) Hints: • Obtain the specific weight of water for the given temperature from Appendix A (Table A.1). • Obtain the resistance coefficient (K) for sudden enlargement from Table 10.3B in chapter 10. Instructions: Only express the areas in scientific notation to three decimal places but round off to three decimal places in normal number format where necessary throughout your calculations leading to the final answer and including the final answer for all other computations excluding the area.
10.10 Resistance Coefficiemts for Valves and Fittings 297 expressed as equivalent Equivalent Length in Pipe Diameters Туре LID Globe valve-fully open Angle valve-fully open 340 Gate valve-fully open 150 4 open 35 ½ open 160 4 open Check valve-swing type 900 100 Check valve-ball type 150 Butterfly valve-fully open, 0-200 mm (2-8 in.) 45 -250-350 mm (10-14 in.) 35 400-600 mm (16-24 in. ) 25 Foot valve-poppet disc type Foot valve-hinged disc type 420 75 90 standard elbow 30 90 long radius elbow 20 90 street elbow 50 45° standard elbow 16 45° street elbow 26 Close return bend 50 Standard tee-with flow through run 20 60 -with flow through branch Source: Crane Valves, Signal Hill, CA. We can also compute L, = (L/D)D. Note, however, that this would be valid only if the flow in the pipe is in the zone of complete turbulence. If the pipe is made from a material different from new, clean, commercia steel pipe, it is necessary to compute the relative roughness D/e, and then use th. Moody diagram to determine the friction factor in the zone of complete turbulence %3D Friction Factor fr TABLE 10.5 Friction factor in ne of complete turbulence for new, dean, commercial steel pipe Friction Nominal Nominal Factor fr Pipe Size (in) Pipe Size (in) 32, 4 0.017 0.027 5 0.016 0.025 0.015 0.023 8-10 0.014 14 0.022 12-16 0.013 0.021 1½ 18-24 0.012 0.019 0.018 22, 3
Transcribed Image Text:10.10 Resistance Coefficiemts for Valves and Fittings 297 expressed as equivalent Equivalent Length in Pipe Diameters Туре LID Globe valve-fully open Angle valve-fully open 340 Gate valve-fully open 150 4 open 35 ½ open 160 4 open Check valve-swing type 900 100 Check valve-ball type 150 Butterfly valve-fully open, 0-200 mm (2-8 in.) 45 -250-350 mm (10-14 in.) 35 400-600 mm (16-24 in. ) 25 Foot valve-poppet disc type Foot valve-hinged disc type 420 75 90 standard elbow 30 90 long radius elbow 20 90 street elbow 50 45° standard elbow 16 45° street elbow 26 Close return bend 50 Standard tee-with flow through run 20 60 -with flow through branch Source: Crane Valves, Signal Hill, CA. We can also compute L, = (L/D)D. Note, however, that this would be valid only if the flow in the pipe is in the zone of complete turbulence. If the pipe is made from a material different from new, clean, commercia steel pipe, it is necessary to compute the relative roughness D/e, and then use th. Moody diagram to determine the friction factor in the zone of complete turbulence %3D Friction Factor fr TABLE 10.5 Friction factor in ne of complete turbulence for new, dean, commercial steel pipe Friction Nominal Nominal Factor fr Pipe Size (in) Pipe Size (in) 32, 4 0.017 0.027 5 0.016 0.025 0.015 0.023 8-10 0.014 14 0.022 12-16 0.013 0.021 1½ 18-24 0.012 0.019 0.018 22, 3
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