Reference no: EM132826029

SEHS4629 Fluid Engineering - The Hong Kong Polytechnic University

Project - Water Supply Pipe Network Design and Pump Selection

Instructions

1. This mini project should be completed by groups. Each group is formed by 4~5 students.

2. Each group should submit a project report and the spreadsheet calculations in Excel format. Full details of the design calculations method and analysis should be presented in the report in a logical manner.

B. Design Data
• Each group is required to design the water supply pipe networks. The pipe network covers all major 11 buildings (Block A to K) within the site. Different group is assigned with different building information.

Group 1			Group 2
Block	Total floor	Flat per floor	Block	Total floor	Flat per floor
A, D, E	32	8	A, D, E	25	6
B, C	25	6	B, C	32	8
H, I, F	18	8	H, I, F	18	6
G, J, K	28	6	G, J, K	28	8

Group 3			Group 4
Block	Total floor	Flat per floor	Block	Total floor	Flat per floor
A, D, E	28	4	A, D, E	24	6
B, C	18	6	B, C	35	4
H, I, F	36	6	H, I, F	26	8
G, J, K	28	8	G, J, K	32	6

 

Group 5			Group 6
Block	Total floor	Flat per floor	Block	Total floor	Flat per floor
A, D, E	22	6	A, D, E	31	4
B, C	32	6	B, C	42	6
H, I, F	28	8	H, I, F	22	8
G, J, K	32	4	G, J, K	26	6

 

Group 7			Group 8
Block	Total floor	Flat per floor	Block	Total floor	Flat per floor
A, D, E	25	6	A, D, E	30	6
B, C	36	6	B, C	36	6
H, I, F	42	6	H, I, F	24	6
G, J, K	22	8	G, J, K	28	6

 

Group 9			Group 10
Block	Total floor	Flat per floor	Block	Total floor	Flat per floor
A, D, E	26	8	A, D, E	27	6
B, C	24	8	B, C	35	8
H, I, F	40	6	H, I, F	32	6
G, J, K	18	6	G, J, K	28	6

 

Group 11			Group 12
Block	Total floor	Flat per floor	Block	Total floor	Flat per floor
A, D, E	26	8	A, D, E	29	6
B, C	25	8	B, C	36	8
H, I, F	39	6	H, I, F	33	8
G, J, K	19	6	G, J, K	27	6

• Fire water demand is not considered in this case and topography of the site is virtually flat. The working pressure at the inlet point of the pipe network is assumed to be 65 m.
• Darcy Weisbach equation should be used in the design calculation.
• Allowable velocity range in pipes: 0.5 to 2.0 m/s
• Working pressure in pipes:
» Maximum of 70 m
• Standard pipe sizes (pipe diameters):
100mm, 150mm, 200mm 250mm, 300mm, 350mm, 400mm, 450mm, 500mm, 600mm, 750mm, 900mm, 1050mm, 1200mm, 1350mm, 1500mm and 1600mm

C. Water Supply and Water Demand
The project group is required to estimate:
1. Population in each building
2. Average daily rate of water demand in the system
3. Design flow = maximum daily rate = 1.5 x average daily rate
Note: Make assumptions where necessary and cite the sources of information.

D. Pipe Network Design and Pump Selection
Hardy-Cross method should be used to perform the following assessments:
1. Determine the sizes of pipes in the system by satisfying the required demands at various locations and the allowable working pressures in pipes. Minor losses in the system can be ignored in this case.
2. Record the pipe diameter, velocity, flow rate and head loss in each pipe and the pressure at each node.

3. Determine whether pumps or other accessories are required for the system or any assumptions have to be proposed in order to make the design feasible. (Hint: The minimum requirement for the normal operation of taps in a flat is 0.5 bar).
4. If pump is added for a certain building. Select proper pump in the market and provide its detail specifications.
5. Present details of the calculations and clearly describe the design steps.
Note: The system should be adequate to meet the design demands. Ideally, the pipe sizes of the system should be such that they cannot be reduced further without violating the pressure and velocity requirements.
E. Report Requirements

Each group is required to submit a project design report covering the pipe network design and calculation process.

Attachment:- Projecct - Pipe Network Design.rar