- 4 An Engineering Company Has Been Appointed To Review The Design Of The Water Supply Infrastructure For Taung In The Nor 1 (79.36 KiB) Viewed 42 times
- 4 An Engineering Company Has Been Appointed To Review The Design Of The Water Supply Infrastructure For Taung In The Nor 2 (14.55 KiB) Viewed 42 times
- 4 An Engineering Company Has Been Appointed To Review The Design Of The Water Supply Infrastructure For Taung In The Nor 3 (110.16 KiB) Viewed 42 times
this is a water engineering problem, all the data has been provided on the table and the diagram above
I've re-posted my question with all the mising information, nevermind this one
4 An engineering company has been appointed to review the design of the water supply infrastructure for Taung in the North West Province. The review is based on data given in Table 1 and relevant values from The Neighbourhood Planning and Design Guide (Redbook). A brochure from the pipe supplier is also provided. Table 1: Design data for a Taung S/No. Design data Value Units 1 Population growth rate 2.4 % 2 Design Horizon 15 years 120 3 Abattoir Cattle 200 Sheep Hospital 250 beds 5 Day school 600 Students 6 Boarding School 450 students 7 Church 550 m2 Filling station 400 m2 Standpipes 1050 9 Yard connections with full flush sanitation 2460 population Low-income housing connection 4000 Residential house connection 1200 10 Lodge 70 Single rooms 90 Double rooms 11 Fruit processing industry 0.6 ML/day 12 Design Loss Factor (LF) % 13 Summer Peak Factor (SPF): 8 10 1.4 Figure 1 depicts the Water supply scheme from the treatment plant to the distribution system. Water is pumped from temporary storage (contact tank) to the distribution reservoir and flows by gravity to consumers. The various consumer groups have been allocated to nodes (not required for this task).
1155 m 1155 Reserva A1120 1001 masi Pum 1090 m Contact tank Figure 1: Schematic Layout of the Taung Water Supply System
Task 1 (a) Determine AADD, GAADD & SDD for Taung (use Table 1 and consumption figures from the Redbook). (b) Use GAADD to determine the pump head required if both the suction and delivery pipes have a diameter of 160 mm (UPVC pipes - see brochure for details). Select appropriate classes for both the pumping main and the gravity main. (C) Use this calculated pump head to select the most suitable impeller size (a system characteristic curve is required). Determine the power at the duty point. (d) Check for cavitation. The pump characteristic curves for various impeller sizes as well as efficiency curves are given in Figure 2. 30% 50%60% 60 70% 73% 475%。 H 50 (m) 170% 40 200mm XXXXX 190mmits 60% 209mm 30 ki 80mm 170mm 20 0,01 0,03 0,04 0,05 0,02 Q (m3/s) Figure 2 Pump characteristic and efficiency curves Components of the water supply system • Delivery line: 4 bends, 3 valves • Suction line: 1 bend, 1 valve • Water temperature = 20°C • Pipe between the contact tank and pump: 15 m • Pipe between the pump and the reservoir: 870 m (diameter 160 mm) • Pipe between the reservoir the supply area: 200 m (diameter 160 mm) • Elevations of the various points are indicated on the layout. • Information not provided should be reasonably assumed and justified. • Assume atmospheric pressure = 101.1 kPa; vapour pressure at 20°C. NPSHR= 4.2 m. Task 2 Use SDD to determine the pressure head at the inlet node (A). Investigations revealed that fire fighting requirements are well catered for within the summer daily demand. 3