Question

1. The Davis Dam was constructed 67 miles downstream from the Hoover Dam. The reservoir formed by the dam is called Lake Mohave. The reservoir has a total storage capacity of 1,818,300 acre-feet. Given the average head of the reservoir is 136 feet, determine the potential energy of the water in the reservoir.

2. When the effective head of water behind the Davis Dam is 41 meters, a penstock 22 feet in diameter will flow 42,000 gallons of water per second to the turbine. Determine the output power of a penstock and the velocity of water exiting the penstock.

3. A particular impoundment hydro facility has 5 penstocks feeding 5 Francis turbines. The power of the water at the outlet of each penstock is 64MW. Given the hydro efficiency of 92%, the turbine efficiency is 90% and the generator efficiency is 95%, determine the total plant capacity.

4. The cooling tower of a wood fired power plant extracts 12,550 BTU/kg of burned dry wood. Given dry wood has a TEC of 19,000 BTU/kg determine the mechanical energy of the turbine and the ideal thermal efficiency of the turbine.

Answer 1

Then the potentiol enery of t* of acre-feet wwme the Yeô ewe/v-1815300 Feet 1516943334 lbf- feet 1516943-726 KPdury-feet. Turbine power-a, ~ 2 CAoLinj ower 6450 B/) WT6453394 2.