The Temenggor dam produces a total of 6.6 x10 kW of electrical energy through the use...

 

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The Temenggor dam produces a total of 6.6 x10 kW of electrical energy through the use of 33 turbines, or 2.2 x 105 kW of electrical energy from each turbine. The feed to each turbine is drawn through a tube (called a penstock) that is 18 feet in diameter. The penstock draws water from the dam water surface and discharges it 350 feet lower than the water surface on the upstream side of the dam. Each turbine is only 30% efficient in converting the mechanical energy it receives into electrical energy. (a) Draw, label the process and state your assumptions (5 Marks) (b) If changes in kinetic energy are neglected how much water (kg/s) must pass through each turbine? (9 Marks) (c) Using only the mass from Part (b), what is the velocity (m/s) of water coming out from the penstock? (8 Marks) (d) Is the neglect of a change in kinetic energy justified? Substantiate your answer. (3 Marks) The Temenggor dam produces a total of 6.6 x10 kW of electrical energy through the use of 33 turbines, or 2.2 x 105 kW of electrical energy from each turbine. The feed to each turbine is drawn through a tube (called a penstock) that is 18 feet in diameter. The penstock draws water from the dam water surface and discharges it 350 feet lower than the water surface on the upstream side of the dam. Each turbine is only 30% efficient in converting the mechanical energy it receives into electrical energy. (a) Draw, label the process and state your assumptions (5 Marks) (b) If changes in kinetic energy are neglected how much water (kg/s) must pass through each turbine? (9 Marks) (c) Using only the mass from Part (b), what is the velocity (m/s) of water coming out from the penstock? (8 Marks) (d) Is the neglect of a change in kinetic energy justified? Substantiate your answer. (3 Marks)

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b To calculate the amount of water that must pass through each turbine we can use the equation Power Mass flow rate Acceleration due to gravity Height ... View the full answer