Use the energy again obtain the head dissipated the turbine

SCHOOL OF CIVIL ENVIRONEMENTAL & CHEMICAL ENGINEERING Water Engineering (CIVE1181)

Semester-long Assignment (SLA)

Melbourne. The Victorian Government’s ‘Our Water Our Future’ outlines major infrastructure projects to secure Victoria’s water supplies in the face of drought and the challenge of climate change. One of these projects has built a pipeline connecting the Goulburn River near Yea, to Sugarloaf Reservoir at north east of Melbourne (Figure 1). The Sugarloaf Pipeline will transfer up to 75 giga liters (GL) of watenformation on the Sugarloaf pipeline project could be obtained from .

As shown in Figure 1, water will be pumped with two parallel pumps from the Goulburn River at Point A near Killingworth (assume river water level elevation is 180m AHD) to two parallel storage tanks at a distance of 6.5 km away at Point B. Each tank would have 4 hours flow holding capacity at a maximum water level height of (180+N)m AHD (N has been defined later). From these tanks water will again be pumped to an elevation of (180+6N)m AHD at Point C by two parallel pipe and pump systems, where each parallel system will have few pumps in series connection (number of pumps need to be found out) to take water over the Great Dividing Range along the Melba Highway. The distance from Point B to Point C is L km. When selecting the pumps, you need to ensure that the pressure at Point C is not cavitational (i.e. it’s a phenomenon where negative pressure develops below the vapor pressure to create noise, vibration and thus disrupts the flow). From Point C to Point D at Kinglake, water is transferred through a single pipe (called penstock) to an elevation of (180+3N)m AHD at a distance of 500m away. This flow will rotate a hydraulic turbine, which in turn will drive a generator to produce and supply electrical power to the area. The water from the turbine will move to a downstream manmade reservoir of size enough to hold 3 days flow. Area available for the reservoir construction is a maximum of 1 ha.

The Group average of the summation of all the numbers = (3+6+4+5+2+4+3 + 3+6+3+0+6+8+7) / 2 = 30 km.

N is the Group average of the summation of last three digits of your student IDs. E.g. for the same Group members given above, the Group average of the summation of last two digits = (2+4+3 + 6+8+7) / 2 = 30/2 = 15 m

Step 3 – Similarly assume a diameter for each of the parallel pipeline between B and C and follow the same procedure as stated in Step 2. It is important that we have to avoid the occurrence of cavitational pressure at Point C, the peak height of the pipeline system. If we set the maximum pressure at Point C to a value equal to the vapor pressure (for a given temperature) into the System eq, it would produce the total head dissipated and thus the number of pumps required for the specified flow capacity. Any fractional value has to be converted into the next higher integer of pumps. All these pumps need to be connected in series in order to overcome the total head required. It is to note that pumps in series will add heads from each pump algebraically keeping the discharge same. Calculate the total power

required in the system. Estimate the size of the manmade reservoir for the flow rate and the stated 3 days of operation. Make an estimation of the reservoir bottom elevation also.

As part of the report it is expected that you would include the following: •Introduction and objective of the study
•All calculations
•Justification of all the assumptions used

•Selection of pipes (eg: size, type, etc)
•Procedure in selecting the pump and configuration (e.g. type of pump, number of pumps, pumps in series or parallel, etc)

C (180+6N)m AHD

D (180+3N)m AHD